./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/fragtest_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/fragtest_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa --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 be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:48:47,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:48:47,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:48:47,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:48:47,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:48:47,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:48:47,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:48:47,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:48:47,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:48:47,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:48:47,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:48:47,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:48:47,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:48:47,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:48:47,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:48:47,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:48:47,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:48:47,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:48:47,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:48:47,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:48:47,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:48:47,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:48:47,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:48:47,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:48:47,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:48:47,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:48:47,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:48:47,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:48:47,272 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:48:47,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:48:47,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:48:47,274 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:48:47,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:48:47,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:48:47,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:48:47,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:48:47,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:48:47,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:48:47,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:48:47,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:48:47,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:48:47,279 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:48:47,295 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:48:47,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:48:47,295 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:48:47,296 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:48:47,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:48:47,296 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:48:47,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:48:47,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:48:47,297 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:48:47,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:48:47,297 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:48:47,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:48:47,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:48:47,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:48:47,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:48:47,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:48:47,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:48:47,298 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:48:47,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:48:47,299 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:48:47,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:48:47,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:48:47,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:48:47,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:48:47,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:48:47,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:48:47,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:48:47,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:48:47,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:48:47,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:48:47,300 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:48:47,300 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:48:47,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:48:47,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:48:47,300 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_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e [2021-12-06 17:48:47,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:48:47,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:48:47,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:48:47,486 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:48:47,486 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:48:47,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loop-invgen/fragtest_simple.i [2021-12-06 17:48:47,530 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/data/46ab36806/3dbae01df3bd44c39be5eb505ee91825/FLAGbc7be6302 [2021-12-06 17:48:47,880 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:48:47,881 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/sv-benchmarks/c/loop-invgen/fragtest_simple.i [2021-12-06 17:48:47,885 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/data/46ab36806/3dbae01df3bd44c39be5eb505ee91825/FLAGbc7be6302 [2021-12-06 17:48:48,327 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/data/46ab36806/3dbae01df3bd44c39be5eb505ee91825 [2021-12-06 17:48:48,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:48:48,336 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:48:48,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:48:48,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:48:48,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:48:48,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aefc319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48, skipping insertion in model container [2021-12-06 17:48:48,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:48:48,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:48:48,467 WARN L230 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_0875f6d7-c64d-47ce-9b0d-505ec06f780a/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2021-12-06 17:48:48,475 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:48:48,481 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:48:48,489 WARN L230 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_0875f6d7-c64d-47ce-9b0d-505ec06f780a/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2021-12-06 17:48:48,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:48:48,502 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:48:48,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48 WrapperNode [2021-12-06 17:48:48,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:48:48,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:48:48,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:48:48,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:48:48,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,524 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2021-12-06 17:48:48,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:48:48,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:48:48,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:48:48,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:48:48,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:48:48,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:48:48,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:48:48,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:48:48,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:48:48,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:48,567 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:48:48,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:48:48,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:48:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:48:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:48:48,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:48:48,653 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:48:48,655 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:48:48,738 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:48:48,744 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:48:48,744 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 17:48:48,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:48:48 BoogieIcfgContainer [2021-12-06 17:48:48,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:48:48,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:48:48,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:48:48,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:48:48,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:48:48" (1/3) ... [2021-12-06 17:48:48,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2183d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:48:48, skipping insertion in model container [2021-12-06 17:48:48,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (2/3) ... [2021-12-06 17:48:48,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2183d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:48:48, skipping insertion in model container [2021-12-06 17:48:48,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:48:48" (3/3) ... [2021-12-06 17:48:48,754 INFO L111 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2021-12-06 17:48:48,759 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:48:48,759 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:48:48,805 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:48:48,812 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 [2021-12-06 17:48:48,813 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:48:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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) [2021-12-06 17:48:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 17:48:48,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:48,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:48,831 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:48,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:48,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1265170590, now seen corresponding path program 1 times [2021-12-06 17:48:48,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:48,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878146782] [2021-12-06 17:48:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:48,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:48,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:48,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878146782] [2021-12-06 17:48:48,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878146782] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:48,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:48,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:48:48,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868981079] [2021-12-06 17:48:48,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:48,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:48:48,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:48,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:48:48,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:48:48,972 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-12-06 17:48:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:48,983 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2021-12-06 17:48:48,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:48:48,984 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2021-12-06 17:48:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:48,990 INFO L225 Difference]: With dead ends: 34 [2021-12-06 17:48:48,990 INFO L226 Difference]: Without dead ends: 15 [2021-12-06 17:48:48,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:48:49,001 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:49,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:49,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-06 17:48:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-06 17:48:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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) [2021-12-06 17:48:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-12-06 17:48:49,037 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2021-12-06 17:48:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:49,038 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-12-06 17:48:49,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-12-06 17:48:49,038 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-12-06 17:48:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 17:48:49,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:49,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:49,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:48:49,039 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:49,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:49,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1704738984, now seen corresponding path program 1 times [2021-12-06 17:48:49,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:49,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906160454] [2021-12-06 17:48:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:49,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:49,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:49,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906160454] [2021-12-06 17:48:49,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906160454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:49,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:49,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:48:49,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674139824] [2021-12-06 17:48:49,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:49,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:48:49,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:49,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:48:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:48:49,136 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-06 17:48:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:49,163 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-12-06 17:48:49,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:48:49,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-12-06 17:48:49,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:49,164 INFO L225 Difference]: With dead ends: 20 [2021-12-06 17:48:49,164 INFO L226 Difference]: Without dead ends: 18 [2021-12-06 17:48:49,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:48:49,166 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:49,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:49,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-06 17:48:49,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-12-06 17:48:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2021-12-06 17:48:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-12-06 17:48:49,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2021-12-06 17:48:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:49,172 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-12-06 17:48:49,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-06 17:48:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-12-06 17:48:49,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 17:48:49,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:49,173 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:49,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:48:49,174 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:49,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:49,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1111328011, now seen corresponding path program 1 times [2021-12-06 17:48:49,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:49,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614446179] [2021-12-06 17:48:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:49,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:49,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:49,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614446179] [2021-12-06 17:48:49,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614446179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:49,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:49,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:48:49,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847264951] [2021-12-06 17:48:49,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:49,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:48:49,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:49,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:48:49,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:48:49,242 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-12-06 17:48:49,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:49,285 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-12-06 17:48:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:48:49,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2021-12-06 17:48:49,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:49,286 INFO L225 Difference]: With dead ends: 34 [2021-12-06 17:48:49,286 INFO L226 Difference]: Without dead ends: 23 [2021-12-06 17:48:49,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:48:49,288 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:49,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-06 17:48:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2021-12-06 17:48:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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) [2021-12-06 17:48:49,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-12-06 17:48:49,293 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2021-12-06 17:48:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:49,294 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-12-06 17:48:49,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-12-06 17:48:49,294 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-12-06 17:48:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:48:49,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:49,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:49,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:48:49,295 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:49,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1396960176, now seen corresponding path program 1 times [2021-12-06 17:48:49,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:49,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897155436] [2021-12-06 17:48:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:49,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:49,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:49,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897155436] [2021-12-06 17:48:49,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897155436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:49,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545800793] [2021-12-06 17:48:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:49,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:49,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:49,355 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:49,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:48:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:49,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:48:49,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:49,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:49,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545800793] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:49,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:49,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-06 17:48:49,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606339023] [2021-12-06 17:48:49,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:49,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:48:49,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:49,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:48:49,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:48:49,535 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 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) [2021-12-06 17:48:49,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:49,639 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-12-06 17:48:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 17:48:49,639 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 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 18 [2021-12-06 17:48:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:49,640 INFO L225 Difference]: With dead ends: 45 [2021-12-06 17:48:49,640 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 17:48:49,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-12-06 17:48:49,642 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:49,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 52 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:49,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 17:48:49,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2021-12-06 17:48:49,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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) [2021-12-06 17:48:49,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-06 17:48:49,647 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-12-06 17:48:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:49,647 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-06 17:48:49,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 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) [2021-12-06 17:48:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-06 17:48:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 17:48:49,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:49,648 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:49,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:48:49,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:49,850 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:49,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2071602104, now seen corresponding path program 2 times [2021-12-06 17:48:49,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:49,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791804818] [2021-12-06 17:48:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:49,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:50,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:50,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791804818] [2021-12-06 17:48:50,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791804818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:50,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315224377] [2021-12-06 17:48:50,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:48:50,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:50,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:50,016 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:50,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:48:50,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:48:50,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:48:50,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:48:50,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:50,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:50,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315224377] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:50,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:50,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2021-12-06 17:48:50,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140552059] [2021-12-06 17:48:50,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:50,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 17:48:50,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:50,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 17:48:50,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:48:50,221 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 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) [2021-12-06 17:48:50,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:50,372 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2021-12-06 17:48:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 17:48:50,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 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 24 [2021-12-06 17:48:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:50,374 INFO L225 Difference]: With dead ends: 59 [2021-12-06 17:48:50,375 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 17:48:50,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2021-12-06 17:48:50,376 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 79 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:50,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 59 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:50,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 17:48:50,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-12-06 17:48:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 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) [2021-12-06 17:48:50,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-06 17:48:50,382 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2021-12-06 17:48:50,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:50,382 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-06 17:48:50,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 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) [2021-12-06 17:48:50,382 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-06 17:48:50,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 17:48:50,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:50,383 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:50,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:48:50,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:50,585 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:50,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:50,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1976024800, now seen corresponding path program 3 times [2021-12-06 17:48:50,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:50,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662112298] [2021-12-06 17:48:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:50,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:50,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:50,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662112298] [2021-12-06 17:48:50,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662112298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:50,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361956472] [2021-12-06 17:48:50,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:48:50,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:50,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:50,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:50,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:48:50,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 17:48:50,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:48:50,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 17:48:50,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:50,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:50,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361956472] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:50,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:50,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 15 [2021-12-06 17:48:50,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185625653] [2021-12-06 17:48:50,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:50,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:48:50,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:50,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:48:50,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:48:50,822 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 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) [2021-12-06 17:48:50,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:50,976 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2021-12-06 17:48:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 17:48:50,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 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 30 [2021-12-06 17:48:50,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:50,978 INFO L225 Difference]: With dead ends: 75 [2021-12-06 17:48:50,978 INFO L226 Difference]: Without dead ends: 56 [2021-12-06 17:48:50,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2021-12-06 17:48:50,979 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:50,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 74 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:50,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-06 17:48:50,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 37. [2021-12-06 17:48:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 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) [2021-12-06 17:48:50,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-12-06 17:48:50,984 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2021-12-06 17:48:50,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:50,985 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-12-06 17:48:50,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 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) [2021-12-06 17:48:50,985 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-12-06 17:48:50,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 17:48:50,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:50,986 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:51,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:48:51,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:51,188 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:51,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:51,189 INFO L85 PathProgramCache]: Analyzing trace with hash -634009032, now seen corresponding path program 4 times [2021-12-06 17:48:51,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:51,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107376642] [2021-12-06 17:48:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:51,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 23 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:51,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:51,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107376642] [2021-12-06 17:48:51,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107376642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:51,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096250426] [2021-12-06 17:48:51,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:48:51,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:51,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:51,370 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:51,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:48:51,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:48:51,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:48:51,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 17:48:51,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:51,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:51,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096250426] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:51,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:51,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 18 [2021-12-06 17:48:51,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863971909] [2021-12-06 17:48:51,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:51,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 17:48:51,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:51,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:48:51,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:48:51,544 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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) [2021-12-06 17:48:51,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:51,735 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2021-12-06 17:48:51,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 17:48:51,735 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 36 [2021-12-06 17:48:51,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:51,736 INFO L225 Difference]: With dead ends: 89 [2021-12-06 17:48:51,736 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 17:48:51,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=1125, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 17:48:51,737 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:51,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 85 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 17:48:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 43. [2021-12-06 17:48:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 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) [2021-12-06 17:48:51,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-12-06 17:48:51,743 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2021-12-06 17:48:51,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:51,743 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-12-06 17:48:51,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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) [2021-12-06 17:48:51,744 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-12-06 17:48:51,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 17:48:51,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:51,744 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:51,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 17:48:51,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 17:48:51,946 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:51,948 INFO L85 PathProgramCache]: Analyzing trace with hash 858072976, now seen corresponding path program 5 times [2021-12-06 17:48:51,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:51,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073068226] [2021-12-06 17:48:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:51,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 38 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:52,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:52,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073068226] [2021-12-06 17:48:52,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073068226] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:52,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006080042] [2021-12-06 17:48:52,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:48:52,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:52,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:52,137 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:52,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:48:52,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 17:48:52,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:48:52,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:48:52,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:52,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:52,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006080042] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:52,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:52,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2021-12-06 17:48:52,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443577911] [2021-12-06 17:48:52,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:52,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 17:48:52,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:52,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 17:48:52,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:48:52,389 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 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) [2021-12-06 17:48:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:52,484 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2021-12-06 17:48:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:48:52,484 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 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 42 [2021-12-06 17:48:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:52,485 INFO L225 Difference]: With dead ends: 96 [2021-12-06 17:48:52,485 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 17:48:52,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-12-06 17:48:52,486 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 80 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:52,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 123 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:52,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 17:48:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2021-12-06 17:48:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 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) [2021-12-06 17:48:52,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-12-06 17:48:52,491 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 42 [2021-12-06 17:48:52,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:52,491 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-12-06 17:48:52,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 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) [2021-12-06 17:48:52,492 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-12-06 17:48:52,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 17:48:52,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:52,493 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:52,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:48:52,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:52,694 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:52,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:52,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1499997707, now seen corresponding path program 6 times [2021-12-06 17:48:52,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:52,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832974681] [2021-12-06 17:48:52,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:52,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:52,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:52,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832974681] [2021-12-06 17:48:52,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832974681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:52,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071525352] [2021-12-06 17:48:52,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:48:52,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:52,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:52,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:52,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:48:52,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 17:48:52,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:48:52,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 17:48:52,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:52,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:53,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071525352] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:53,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:53,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2021-12-06 17:48:53,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403217602] [2021-12-06 17:48:53,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:53,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:48:53,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:53,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:48:53,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:48:53,051 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 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) [2021-12-06 17:48:53,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:53,120 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-12-06 17:48:53,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 17:48:53,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 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 44 [2021-12-06 17:48:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:53,122 INFO L225 Difference]: With dead ends: 62 [2021-12-06 17:48:53,122 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 17:48:53,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:48:53,123 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:53,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 92 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:53,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 17:48:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-12-06 17:48:53,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 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) [2021-12-06 17:48:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-12-06 17:48:53,128 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 44 [2021-12-06 17:48:53,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:53,128 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-12-06 17:48:53,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 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) [2021-12-06 17:48:53,128 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-12-06 17:48:53,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 17:48:53,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:53,130 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:53,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:48:53,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:53,331 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:53,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1325832485, now seen corresponding path program 7 times [2021-12-06 17:48:53,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:53,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715645711] [2021-12-06 17:48:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:53,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 80 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:53,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:53,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715645711] [2021-12-06 17:48:53,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715645711] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:53,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688659267] [2021-12-06 17:48:53,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:48:53,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:53,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:53,545 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:53,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:48:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:53,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 17:48:53,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 96 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:48:53,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 96 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:48:53,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688659267] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:53,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:53,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 26 [2021-12-06 17:48:53,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59051676] [2021-12-06 17:48:53,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:53,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 17:48:53,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:53,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 17:48:53,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-12-06 17:48:53,803 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 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) [2021-12-06 17:48:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:53,910 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2021-12-06 17:48:53,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:48:53,911 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 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 52 [2021-12-06 17:48:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:53,912 INFO L225 Difference]: With dead ends: 116 [2021-12-06 17:48:53,912 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 17:48:53,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 17:48:53,913 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 95 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:53,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 111 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:53,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 17:48:53,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2021-12-06 17:48:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2021-12-06 17:48:53,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-12-06 17:48:53,921 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 52 [2021-12-06 17:48:53,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:53,921 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-12-06 17:48:53,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 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) [2021-12-06 17:48:53,921 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-12-06 17:48:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 17:48:53,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:53,922 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:53,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 17:48:54,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 17:48:54,123 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:54,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:54,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1066393856, now seen corresponding path program 8 times [2021-12-06 17:48:54,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:54,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649120069] [2021-12-06 17:48:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:54,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 80 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:54,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:54,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649120069] [2021-12-06 17:48:54,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649120069] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:54,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50765949] [2021-12-06 17:48:54,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:48:54,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:54,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:54,252 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:54,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:48:54,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:48:54,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:48:54,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:48:54,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:54,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:54,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50765949] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:54,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:54,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 27 [2021-12-06 17:48:54,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837966449] [2021-12-06 17:48:54,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:54,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 17:48:54,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:54,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 17:48:54,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-12-06 17:48:54,503 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 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) [2021-12-06 17:48:54,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:54,862 INFO L93 Difference]: Finished difference Result 131 states and 152 transitions. [2021-12-06 17:48:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 17:48:54,862 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 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 54 [2021-12-06 17:48:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:54,863 INFO L225 Difference]: With dead ends: 131 [2021-12-06 17:48:54,863 INFO L226 Difference]: Without dead ends: 96 [2021-12-06 17:48:54,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=626, Invalid=2796, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 17:48:54,865 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 163 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:54,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 130 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:48:54,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-06 17:48:54,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 61. [2021-12-06 17:48:54,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 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) [2021-12-06 17:48:54,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-12-06 17:48:54,871 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2021-12-06 17:48:54,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:54,871 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-12-06 17:48:54,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 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) [2021-12-06 17:48:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-12-06 17:48:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 17:48:54,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:54,872 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:54,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 17:48:55,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 17:48:55,074 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:55,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:55,075 INFO L85 PathProgramCache]: Analyzing trace with hash 85268760, now seen corresponding path program 9 times [2021-12-06 17:48:55,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:55,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84888691] [2021-12-06 17:48:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:55,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 107 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:55,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:55,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84888691] [2021-12-06 17:48:55,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84888691] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:55,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669803485] [2021-12-06 17:48:55,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:48:55,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:55,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:55,228 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:55,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 17:48:55,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 17:48:55,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:48:55,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 17:48:55,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 128 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:55,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 128 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:55,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669803485] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:55,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:55,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2021-12-06 17:48:55,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449710728] [2021-12-06 17:48:55,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:55,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 17:48:55,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:55,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 17:48:55,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2021-12-06 17:48:55,530 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 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) [2021-12-06 17:48:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:55,662 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2021-12-06 17:48:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 17:48:55,662 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 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 60 [2021-12-06 17:48:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:55,663 INFO L225 Difference]: With dead ends: 138 [2021-12-06 17:48:55,663 INFO L226 Difference]: Without dead ends: 99 [2021-12-06 17:48:55,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=405, Invalid=1155, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 17:48:55,664 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 98 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:55,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 168 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-06 17:48:55,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 63. [2021-12-06 17:48:55,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 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) [2021-12-06 17:48:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-12-06 17:48:55,669 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 60 [2021-12-06 17:48:55,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:55,669 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-12-06 17:48:55,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 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) [2021-12-06 17:48:55,669 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-12-06 17:48:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 17:48:55,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:55,670 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:55,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 17:48:55,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 17:48:55,872 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:55,873 INFO L85 PathProgramCache]: Analyzing trace with hash -600318915, now seen corresponding path program 10 times [2021-12-06 17:48:55,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:55,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291978532] [2021-12-06 17:48:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:55,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 72 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:55,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:55,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291978532] [2021-12-06 17:48:55,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291978532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:55,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379257808] [2021-12-06 17:48:55,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:48:55,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:55,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:55,994 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:55,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 17:48:56,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:48:56,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:48:56,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 17:48:56,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:56,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:56,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379257808] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:56,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:56,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16 [2021-12-06 17:48:56,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912621884] [2021-12-06 17:48:56,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:56,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 17:48:56,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:56,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 17:48:56,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:48:56,174 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 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) [2021-12-06 17:48:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:56,261 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-12-06 17:48:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 17:48:56,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 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 62 [2021-12-06 17:48:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:56,262 INFO L225 Difference]: With dead ends: 80 [2021-12-06 17:48:56,262 INFO L226 Difference]: Without dead ends: 78 [2021-12-06 17:48:56,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-12-06 17:48:56,263 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 56 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:56,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 138 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:56,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-06 17:48:56,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-12-06 17:48:56,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 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) [2021-12-06 17:48:56,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-12-06 17:48:56,268 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 62 [2021-12-06 17:48:56,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:56,268 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-12-06 17:48:56,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 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) [2021-12-06 17:48:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-12-06 17:48:56,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 17:48:56,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:56,269 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:56,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 17:48:56,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 17:48:56,471 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:56,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:56,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2101960413, now seen corresponding path program 11 times [2021-12-06 17:48:56,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:56,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081527638] [2021-12-06 17:48:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:56,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 173 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:56,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:56,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081527638] [2021-12-06 17:48:56,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081527638] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:56,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171745298] [2021-12-06 17:48:56,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:48:56,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:56,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:56,655 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:56,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 17:48:56,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 17:48:56,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:48:56,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 17:48:56,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 200 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:56,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 200 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:57,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171745298] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:57,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:57,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2021-12-06 17:48:57,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500432991] [2021-12-06 17:48:57,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:57,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 17:48:57,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:57,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 17:48:57,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1066, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 17:48:57,024 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 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) [2021-12-06 17:48:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:57,262 INFO L93 Difference]: Finished difference Result 205 states and 232 transitions. [2021-12-06 17:48:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 17:48:57,262 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 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 70 [2021-12-06 17:48:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:57,263 INFO L225 Difference]: With dead ends: 205 [2021-12-06 17:48:57,263 INFO L226 Difference]: Without dead ends: 119 [2021-12-06 17:48:57,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 17:48:57,265 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:57,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 279 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:57,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-06 17:48:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 75. [2021-12-06 17:48:57,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 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) [2021-12-06 17:48:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-12-06 17:48:57,270 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 70 [2021-12-06 17:48:57,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:57,270 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-12-06 17:48:57,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 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) [2021-12-06 17:48:57,270 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-12-06 17:48:57,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 17:48:57,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:57,271 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:57,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 17:48:57,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 17:48:57,472 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:57,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:57,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1953124947, now seen corresponding path program 12 times [2021-12-06 17:48:57,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:57,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407557226] [2021-12-06 17:48:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:57,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 110 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:57,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:57,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407557226] [2021-12-06 17:48:57,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407557226] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:57,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113094482] [2021-12-06 17:48:57,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:48:57,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:57,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:57,589 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:57,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 17:48:57,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-06 17:48:57,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:48:57,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 17:48:57,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 132 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:57,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 132 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:57,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113094482] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:57,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:57,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 18 [2021-12-06 17:48:57,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085762704] [2021-12-06 17:48:57,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:57,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 17:48:57,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:57,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:48:57,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:48:57,809 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 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) [2021-12-06 17:48:57,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:57,918 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2021-12-06 17:48:57,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 17:48:57,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 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 74 [2021-12-06 17:48:57,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:57,919 INFO L225 Difference]: With dead ends: 92 [2021-12-06 17:48:57,919 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 17:48:57,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2021-12-06 17:48:57,920 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 97 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:57,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 128 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 17:48:57,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2021-12-06 17:48:57,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 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) [2021-12-06 17:48:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2021-12-06 17:48:57,925 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 74 [2021-12-06 17:48:57,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:57,925 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2021-12-06 17:48:57,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 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) [2021-12-06 17:48:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2021-12-06 17:48:57,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 17:48:57,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:57,926 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:57,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-06 17:48:58,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:58,127 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:58,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:58,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1101267603, now seen corresponding path program 13 times [2021-12-06 17:48:58,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:58,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622177243] [2021-12-06 17:48:58,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:58,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 255 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:58,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:58,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622177243] [2021-12-06 17:48:58,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622177243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:58,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256575029] [2021-12-06 17:48:58,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:48:58,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:58,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:58,351 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:58,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 17:48:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:58,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 17:48:58,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 286 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:48:58,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 286 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:48:58,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256575029] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:58,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:58,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 41 [2021-12-06 17:48:58,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198567437] [2021-12-06 17:48:58,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:58,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 17:48:58,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:58,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 17:48:58,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1259, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 17:48:58,792 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 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) [2021-12-06 17:48:58,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:58,982 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2021-12-06 17:48:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 17:48:58,983 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 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 82 [2021-12-06 17:48:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:58,983 INFO L225 Difference]: With dead ends: 186 [2021-12-06 17:48:58,984 INFO L226 Difference]: Without dead ends: 133 [2021-12-06 17:48:58,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=695, Invalid=2061, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 17:48:58,985 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 150 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:58,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 234 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:58,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-06 17:48:58,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 85. [2021-12-06 17:48:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 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) [2021-12-06 17:48:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-12-06 17:48:58,990 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 82 [2021-12-06 17:48:58,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:58,990 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-12-06 17:48:58,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 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) [2021-12-06 17:48:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-12-06 17:48:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 17:48:58,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:58,991 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:59,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 17:48:59,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 17:48:59,192 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:59,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:59,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1272075272, now seen corresponding path program 14 times [2021-12-06 17:48:59,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:59,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001571585] [2021-12-06 17:48:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:59,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 255 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:59,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:59,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001571585] [2021-12-06 17:48:59,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001571585] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:59,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045701321] [2021-12-06 17:48:59,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:48:59,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:59,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:59,467 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:59,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 17:48:59,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:48:59,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:48:59,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 17:48:59,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 156 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:59,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 156 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:59,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045701321] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:59,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:59,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 42 [2021-12-06 17:48:59,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874723373] [2021-12-06 17:48:59,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:59,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 17:48:59,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:59,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 17:48:59,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1419, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 17:48:59,817 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 42 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 42 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) [2021-12-06 17:49:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:00,410 INFO L93 Difference]: Finished difference Result 201 states and 232 transitions. [2021-12-06 17:49:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 17:49:00,410 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 42 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 84 [2021-12-06 17:49:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:00,411 INFO L225 Difference]: With dead ends: 201 [2021-12-06 17:49:00,411 INFO L226 Difference]: Without dead ends: 146 [2021-12-06 17:49:00,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1501, Invalid=7241, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 17:49:00,414 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 372 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:00,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 229 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:49:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-06 17:49:00,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 91. [2021-12-06 17:49:00,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 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) [2021-12-06 17:49:00,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2021-12-06 17:49:00,420 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2021-12-06 17:49:00,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:00,420 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2021-12-06 17:49:00,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 42 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) [2021-12-06 17:49:00,421 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2021-12-06 17:49:00,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 17:49:00,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:00,421 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:00,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 17:49:00,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 17:49:00,622 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:00,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:00,623 INFO L85 PathProgramCache]: Analyzing trace with hash -641963184, now seen corresponding path program 15 times [2021-12-06 17:49:00,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:00,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174492763] [2021-12-06 17:49:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:00,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 302 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:00,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:00,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174492763] [2021-12-06 17:49:00,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174492763] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:00,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045356412] [2021-12-06 17:49:00,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:49:00,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:00,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:00,845 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:00,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 17:49:00,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-06 17:49:00,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:00,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 17:49:00,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:01,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:01,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045356412] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:01,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:01,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2021-12-06 17:49:01,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181383653] [2021-12-06 17:49:01,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:01,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 17:49:01,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:01,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 17:49:01,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1587, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 17:49:01,309 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 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) [2021-12-06 17:49:01,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:01,527 INFO L93 Difference]: Finished difference Result 208 states and 240 transitions. [2021-12-06 17:49:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 17:49:01,528 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 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 90 [2021-12-06 17:49:01,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:01,528 INFO L225 Difference]: With dead ends: 208 [2021-12-06 17:49:01,528 INFO L226 Difference]: Without dead ends: 149 [2021-12-06 17:49:01,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 17:49:01,530 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 187 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:01,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 319 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:49:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-06 17:49:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 93. [2021-12-06 17:49:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 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) [2021-12-06 17:49:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2021-12-06 17:49:01,535 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 90 [2021-12-06 17:49:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:01,535 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2021-12-06 17:49:01,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 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) [2021-12-06 17:49:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2021-12-06 17:49:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 17:49:01,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:01,536 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:01,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 17:49:01,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 17:49:01,737 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:01,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1603067829, now seen corresponding path program 16 times [2021-12-06 17:49:01,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:01,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916733984] [2021-12-06 17:49:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:01,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 182 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:01,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:01,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916733984] [2021-12-06 17:49:01,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916733984] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:01,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330751103] [2021-12-06 17:49:01,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:49:01,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:01,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:01,892 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:01,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 17:49:01,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:49:01,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:01,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 17:49:01,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:02,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:02,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330751103] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:02,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:02,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 21 [2021-12-06 17:49:02,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689973189] [2021-12-06 17:49:02,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:02,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 17:49:02,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:02,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 17:49:02,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:49:02,143 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 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) [2021-12-06 17:49:02,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:02,274 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2021-12-06 17:49:02,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 17:49:02,274 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 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 92 [2021-12-06 17:49:02,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:02,275 INFO L225 Difference]: With dead ends: 110 [2021-12-06 17:49:02,275 INFO L226 Difference]: Without dead ends: 108 [2021-12-06 17:49:02,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=502, Invalid=904, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 17:49:02,276 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 72 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:02,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 204 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:49:02,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-06 17:49:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-12-06 17:49:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 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) [2021-12-06 17:49:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2021-12-06 17:49:02,281 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 92 [2021-12-06 17:49:02,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:02,281 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2021-12-06 17:49:02,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 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) [2021-12-06 17:49:02,281 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2021-12-06 17:49:02,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 17:49:02,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:02,282 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:02,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 17:49:02,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:02,483 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:02,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:02,484 INFO L85 PathProgramCache]: Analyzing trace with hash 778874011, now seen corresponding path program 17 times [2021-12-06 17:49:02,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:02,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833566759] [2021-12-06 17:49:02,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:02,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 408 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:02,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:02,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833566759] [2021-12-06 17:49:02,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833566759] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:02,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593009783] [2021-12-06 17:49:02,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:49:02,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:02,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:02,743 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:02,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 17:49:02,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-06 17:49:02,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:02,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 17:49:02,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:03,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:03,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593009783] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:03,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:03,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2021-12-06 17:49:03,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87993714] [2021-12-06 17:49:03,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:03,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 17:49:03,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:03,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 17:49:03,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=2106, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 17:49:03,307 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 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) [2021-12-06 17:49:03,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:03,711 INFO L93 Difference]: Finished difference Result 295 states and 332 transitions. [2021-12-06 17:49:03,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 17:49:03,712 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 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 100 [2021-12-06 17:49:03,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:03,713 INFO L225 Difference]: With dead ends: 295 [2021-12-06 17:49:03,713 INFO L226 Difference]: Without dead ends: 169 [2021-12-06 17:49:03,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1721, Invalid=5251, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 17:49:03,715 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 289 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:03,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 422 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:49:03,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-06 17:49:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 105. [2021-12-06 17:49:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 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) [2021-12-06 17:49:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2021-12-06 17:49:03,721 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 100 [2021-12-06 17:49:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:03,721 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2021-12-06 17:49:03,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 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) [2021-12-06 17:49:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2021-12-06 17:49:03,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 17:49:03,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:03,722 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:03,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 17:49:03,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:03,922 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:03,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:03,923 INFO L85 PathProgramCache]: Analyzing trace with hash -706040923, now seen corresponding path program 18 times [2021-12-06 17:49:03,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:03,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664083438] [2021-12-06 17:49:03,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:03,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 240 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:04,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:04,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664083438] [2021-12-06 17:49:04,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664083438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:04,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026960244] [2021-12-06 17:49:04,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:49:04,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:04,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:04,071 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:04,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 17:49:04,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-06 17:49:04,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:04,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 17:49:04,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:04,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:04,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026960244] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:04,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:04,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 23 [2021-12-06 17:49:04,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623530794] [2021-12-06 17:49:04,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:04,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 17:49:04,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:04,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 17:49:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2021-12-06 17:49:04,386 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 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) [2021-12-06 17:49:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:04,539 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2021-12-06 17:49:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 17:49:04,539 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 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 104 [2021-12-06 17:49:04,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:04,540 INFO L225 Difference]: With dead ends: 122 [2021-12-06 17:49:04,540 INFO L226 Difference]: Without dead ends: 120 [2021-12-06 17:49:04,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=617, Invalid=1105, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 17:49:04,541 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 102 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:04,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 202 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:49:04,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-06 17:49:04,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2021-12-06 17:49:04,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 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) [2021-12-06 17:49:04,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2021-12-06 17:49:04,547 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 104 [2021-12-06 17:49:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:04,547 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2021-12-06 17:49:04,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 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) [2021-12-06 17:49:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2021-12-06 17:49:04,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 17:49:04,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:04,548 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:04,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 17:49:04,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:04,749 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:04,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1006078091, now seen corresponding path program 19 times [2021-12-06 17:49:04,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:04,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028578992] [2021-12-06 17:49:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:04,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 530 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:05,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:05,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028578992] [2021-12-06 17:49:05,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028578992] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:05,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742031539] [2021-12-06 17:49:05,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:49:05,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:05,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:05,071 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:05,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 17:49:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:05,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 17:49:05,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:49:05,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:49:05,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742031539] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:05,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:05,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 56 [2021-12-06 17:49:05,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288540302] [2021-12-06 17:49:05,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:05,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 17:49:05,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 17:49:05,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=2374, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 17:49:05,652 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 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) [2021-12-06 17:49:05,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:05,944 INFO L93 Difference]: Finished difference Result 256 states and 294 transitions. [2021-12-06 17:49:05,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 17:49:05,944 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 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 112 [2021-12-06 17:49:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:05,945 INFO L225 Difference]: With dead ends: 256 [2021-12-06 17:49:05,945 INFO L226 Difference]: Without dead ends: 183 [2021-12-06 17:49:05,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1320, Invalid=3936, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 17:49:05,947 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 237 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:05,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 401 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:49:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-06 17:49:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 115. [2021-12-06 17:49:05,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 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) [2021-12-06 17:49:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2021-12-06 17:49:05,953 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 112 [2021-12-06 17:49:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:05,953 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2021-12-06 17:49:05,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 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) [2021-12-06 17:49:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2021-12-06 17:49:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 17:49:05,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:05,954 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:05,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 17:49:06,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 17:49:06,155 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:06,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1154118448, now seen corresponding path program 20 times [2021-12-06 17:49:06,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:06,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250130891] [2021-12-06 17:49:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:06,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 530 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:06,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:06,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250130891] [2021-12-06 17:49:06,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250130891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:06,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629663763] [2021-12-06 17:49:06,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:49:06,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:06,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:06,508 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:06,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 17:49:06,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:49:06,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:06,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 17:49:06,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:07,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:07,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629663763] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:07,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:07,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2021-12-06 17:49:07,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392405488] [2021-12-06 17:49:07,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:07,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 17:49:07,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:07,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 17:49:07,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=2543, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 17:49:07,119 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 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) [2021-12-06 17:49:07,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:07,435 INFO L93 Difference]: Finished difference Result 264 states and 304 transitions. [2021-12-06 17:49:07,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 17:49:07,435 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 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 114 [2021-12-06 17:49:07,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:07,436 INFO L225 Difference]: With dead ends: 264 [2021-12-06 17:49:07,436 INFO L226 Difference]: Without dead ends: 189 [2021-12-06 17:49:07,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1449, Invalid=4251, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 17:49:07,437 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 220 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:07,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 396 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:49:07,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-06 17:49:07,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 117. [2021-12-06 17:49:07,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 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) [2021-12-06 17:49:07,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2021-12-06 17:49:07,444 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 114 [2021-12-06 17:49:07,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:07,444 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2021-12-06 17:49:07,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 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) [2021-12-06 17:49:07,444 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2021-12-06 17:49:07,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 17:49:07,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:07,444 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:07,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 17:49:07,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:07,645 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:07,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:07,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1686980757, now seen corresponding path program 21 times [2021-12-06 17:49:07,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:07,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475755708] [2021-12-06 17:49:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:07,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 306 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:07,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:07,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475755708] [2021-12-06 17:49:07,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475755708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:07,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792966509] [2021-12-06 17:49:07,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:49:07,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:07,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:07,838 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:07,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 17:49:07,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-06 17:49:07,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:07,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 17:49:07,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:08,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:08,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792966509] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:08,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:08,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 25 [2021-12-06 17:49:08,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289384605] [2021-12-06 17:49:08,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:08,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 17:49:08,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 17:49:08,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2021-12-06 17:49:08,166 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 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) [2021-12-06 17:49:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:08,332 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2021-12-06 17:49:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 17:49:08,333 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 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 116 [2021-12-06 17:49:08,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:08,333 INFO L225 Difference]: With dead ends: 134 [2021-12-06 17:49:08,333 INFO L226 Difference]: Without dead ends: 132 [2021-12-06 17:49:08,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=744, Invalid=1326, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 17:49:08,334 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 92 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:08,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 211 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:49:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-06 17:49:08,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2021-12-06 17:49:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 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) [2021-12-06 17:49:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2021-12-06 17:49:08,341 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 116 [2021-12-06 17:49:08,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:08,341 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2021-12-06 17:49:08,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 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) [2021-12-06 17:49:08,341 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2021-12-06 17:49:08,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 17:49:08,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:08,342 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:08,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 17:49:08,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 17:49:08,543 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:08,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:08,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1134152325, now seen corresponding path program 22 times [2021-12-06 17:49:08,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:08,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960340973] [2021-12-06 17:49:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:08,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 668 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:08,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:08,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960340973] [2021-12-06 17:49:08,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960340973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:08,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505240321] [2021-12-06 17:49:08,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:49:08,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:08,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:08,901 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:08,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 17:49:08,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:49:08,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:08,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 17:49:08,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:09,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:09,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505240321] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:09,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:09,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 65 [2021-12-06 17:49:09,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450447251] [2021-12-06 17:49:09,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:09,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 17:49:09,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:09,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 17:49:09,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=970, Invalid=3190, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 17:49:09,613 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 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) [2021-12-06 17:49:10,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:10,171 INFO L93 Difference]: Finished difference Result 367 states and 412 transitions. [2021-12-06 17:49:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 17:49:10,171 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 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 124 [2021-12-06 17:49:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:10,172 INFO L225 Difference]: With dead ends: 367 [2021-12-06 17:49:10,172 INFO L226 Difference]: Without dead ends: 209 [2021-12-06 17:49:10,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2629, Invalid=8083, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 17:49:10,173 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 300 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:10,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 510 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:49:10,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-06 17:49:10,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 129. [2021-12-06 17:49:10,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 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) [2021-12-06 17:49:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2021-12-06 17:49:10,180 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 124 [2021-12-06 17:49:10,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:10,181 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2021-12-06 17:49:10,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 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) [2021-12-06 17:49:10,181 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2021-12-06 17:49:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-06 17:49:10,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:10,181 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:10,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 17:49:10,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 17:49:10,382 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:10,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:10,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1132082821, now seen corresponding path program 23 times [2021-12-06 17:49:10,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:10,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139347502] [2021-12-06 17:49:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:10,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 380 proven. 762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:10,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:10,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139347502] [2021-12-06 17:49:10,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139347502] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:10,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959295902] [2021-12-06 17:49:10,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:49:10,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:10,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:10,617 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:10,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 17:49:10,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-12-06 17:49:10,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:10,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 17:49:10,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:10,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:10,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959295902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:10,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:10,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 27 [2021-12-06 17:49:10,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101530346] [2021-12-06 17:49:10,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:10,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 17:49:10,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:10,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 17:49:10,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-12-06 17:49:10,977 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 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) [2021-12-06 17:49:11,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:11,177 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2021-12-06 17:49:11,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 17:49:11,177 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 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 128 [2021-12-06 17:49:11,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:11,178 INFO L225 Difference]: With dead ends: 146 [2021-12-06 17:49:11,178 INFO L226 Difference]: Without dead ends: 144 [2021-12-06 17:49:11,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=883, Invalid=1567, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 17:49:11,179 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 124 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:11,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 233 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:49:11,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-06 17:49:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2021-12-06 17:49:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 136 states have internal predecessors, (140), 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) [2021-12-06 17:49:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2021-12-06 17:49:11,186 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 128 [2021-12-06 17:49:11,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:11,187 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2021-12-06 17:49:11,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 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) [2021-12-06 17:49:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2021-12-06 17:49:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-06 17:49:11,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:11,187 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:11,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 17:49:11,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 17:49:11,388 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:11,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1245590379, now seen corresponding path program 24 times [2021-12-06 17:49:11,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:11,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995718205] [2021-12-06 17:49:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:11,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 822 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:11,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:11,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995718205] [2021-12-06 17:49:11,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995718205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:11,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348653618] [2021-12-06 17:49:11,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:49:11,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:11,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:11,861 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:11,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 17:49:11,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-12-06 17:49:11,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:11,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 17:49:11,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:12,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:12,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348653618] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:12,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:12,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 71 [2021-12-06 17:49:12,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318882532] [2021-12-06 17:49:12,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:12,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 17:49:12,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:12,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 17:49:12,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=3816, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 17:49:12,713 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 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) [2021-12-06 17:49:13,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:13,340 INFO L93 Difference]: Finished difference Result 403 states and 452 transitions. [2021-12-06 17:49:13,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 17:49:13,341 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 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 [2021-12-06 17:49:13,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:13,342 INFO L225 Difference]: With dead ends: 403 [2021-12-06 17:49:13,342 INFO L226 Difference]: Without dead ends: 229 [2021-12-06 17:49:13,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3155, Invalid=9727, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 17:49:13,343 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 371 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:13,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 560 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:49:13,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-06 17:49:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 141. [2021-12-06 17:49:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 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) [2021-12-06 17:49:13,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2021-12-06 17:49:13,351 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 136 [2021-12-06 17:49:13,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:13,351 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2021-12-06 17:49:13,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 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) [2021-12-06 17:49:13,351 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2021-12-06 17:49:13,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 17:49:13,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:13,352 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:13,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 17:49:13,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 17:49:13,553 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:13,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1485376139, now seen corresponding path program 25 times [2021-12-06 17:49:13,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:13,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374796029] [2021-12-06 17:49:13,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:13,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 462 proven. 926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:13,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:13,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374796029] [2021-12-06 17:49:13,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374796029] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:13,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386526885] [2021-12-06 17:49:13,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:49:13,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:13,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:13,786 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:13,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 17:49:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:13,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 17:49:13,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:13,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:14,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386526885] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:14,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:14,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 29 [2021-12-06 17:49:14,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619347863] [2021-12-06 17:49:14,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:14,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 17:49:14,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 17:49:14,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2021-12-06 17:49:14,119 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 states have internal predecessors, (163), 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) [2021-12-06 17:49:14,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:14,337 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2021-12-06 17:49:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 17:49:14,337 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 states have internal predecessors, (163), 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 140 [2021-12-06 17:49:14,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:14,338 INFO L225 Difference]: With dead ends: 158 [2021-12-06 17:49:14,338 INFO L226 Difference]: Without dead ends: 156 [2021-12-06 17:49:14,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1034, Invalid=1828, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 17:49:14,339 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 164 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:14,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 222 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:49:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-06 17:49:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 149. [2021-12-06 17:49:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 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) [2021-12-06 17:49:14,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2021-12-06 17:49:14,347 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 140 [2021-12-06 17:49:14,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:14,347 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2021-12-06 17:49:14,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 states have internal predecessors, (163), 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) [2021-12-06 17:49:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2021-12-06 17:49:14,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-06 17:49:14,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:14,348 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:14,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 17:49:14,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 17:49:14,549 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:14,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:14,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1127939493, now seen corresponding path program 26 times [2021-12-06 17:49:14,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:14,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123760115] [2021-12-06 17:49:14,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:14,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 992 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:15,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:15,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123760115] [2021-12-06 17:49:15,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123760115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:15,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3036329] [2021-12-06 17:49:15,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:49:15,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:15,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:15,019 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:15,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 17:49:15,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:49:15,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:15,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 17:49:15,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:49:15,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:49:15,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3036329] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:15,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:15,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 74 [2021-12-06 17:49:15,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63292774] [2021-12-06 17:49:15,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:15,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-06 17:49:15,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:15,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-06 17:49:15,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=4174, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 17:49:15,925 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 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) [2021-12-06 17:49:16,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:16,397 INFO L93 Difference]: Finished difference Result 340 states and 390 transitions. [2021-12-06 17:49:16,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 17:49:16,397 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 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 148 [2021-12-06 17:49:16,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:16,399 INFO L225 Difference]: With dead ends: 340 [2021-12-06 17:49:16,399 INFO L226 Difference]: Without dead ends: 243 [2021-12-06 17:49:16,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2334, Invalid=6978, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 17:49:16,400 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 259 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:16,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 536 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:49:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-06 17:49:16,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 151. [2021-12-06 17:49:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 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) [2021-12-06 17:49:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2021-12-06 17:49:16,414 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 148 [2021-12-06 17:49:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:16,414 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2021-12-06 17:49:16,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 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) [2021-12-06 17:49:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2021-12-06 17:49:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 17:49:16,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:16,415 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:16,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 17:49:16,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:16,616 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1461075584, now seen corresponding path program 27 times [2021-12-06 17:49:16,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:16,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657945681] [2021-12-06 17:49:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:16,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 992 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:17,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:17,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657945681] [2021-12-06 17:49:17,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657945681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:17,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226609927] [2021-12-06 17:49:17,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:49:17,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:17,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:17,098 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:17,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 17:49:17,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-12-06 17:49:17,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:17,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 17:49:17,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 1058 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:17,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 1058 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:18,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226609927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:18,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:18,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 76 [2021-12-06 17:49:18,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228241500] [2021-12-06 17:49:18,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:18,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-06 17:49:18,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:18,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-06 17:49:18,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1303, Invalid=4397, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 17:49:18,062 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 76 states, 76 states have (on average 3.289473684210526) internal successors, (250), 76 states have internal predecessors, (250), 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) [2021-12-06 17:49:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:18,515 INFO L93 Difference]: Finished difference Result 348 states and 400 transitions. [2021-12-06 17:49:18,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 17:49:18,515 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.289473684210526) internal successors, (250), 76 states have internal predecessors, (250), 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 150 [2021-12-06 17:49:18,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:18,517 INFO L225 Difference]: With dead ends: 348 [2021-12-06 17:49:18,517 INFO L226 Difference]: Without dead ends: 249 [2021-12-06 17:49:18,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2505, Invalid=7395, Unknown=0, NotChecked=0, Total=9900 [2021-12-06 17:49:18,518 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 431 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:18,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 502 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:49:18,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-12-06 17:49:18,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 153. [2021-12-06 17:49:18,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0263157894736843) internal successors, (156), 152 states have internal predecessors, (156), 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) [2021-12-06 17:49:18,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2021-12-06 17:49:18,527 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 150 [2021-12-06 17:49:18,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:18,527 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2021-12-06 17:49:18,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.289473684210526) internal successors, (250), 76 states have internal predecessors, (250), 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) [2021-12-06 17:49:18,527 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2021-12-06 17:49:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-06 17:49:18,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:18,528 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:18,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 17:49:18,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:18,729 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:18,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1576467099, now seen corresponding path program 28 times [2021-12-06 17:49:18,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:18,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194796089] [2021-12-06 17:49:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:18,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 552 proven. 1106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:19,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:19,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194796089] [2021-12-06 17:49:19,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194796089] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:19,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076875514] [2021-12-06 17:49:19,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:49:19,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:19,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:19,008 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:19,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 17:49:19,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:49:19,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:19,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 17:49:19,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 600 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:19,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 600 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:19,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076875514] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:19,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:19,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 31 [2021-12-06 17:49:19,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443104366] [2021-12-06 17:49:19,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:19,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 17:49:19,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:19,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 17:49:19,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2021-12-06 17:49:19,374 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 31 states, 31 states have (on average 5.645161290322581) internal successors, (175), 31 states have internal predecessors, (175), 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) [2021-12-06 17:49:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:19,604 INFO L93 Difference]: Finished difference Result 170 states and 174 transitions. [2021-12-06 17:49:19,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 17:49:19,605 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.645161290322581) internal successors, (175), 31 states have internal predecessors, (175), 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 152 [2021-12-06 17:49:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:19,605 INFO L225 Difference]: With dead ends: 170 [2021-12-06 17:49:19,605 INFO L226 Difference]: Without dead ends: 168 [2021-12-06 17:49:19,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 323 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1197, Invalid=2109, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 17:49:19,606 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 122 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:19,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 248 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:49:19,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-06 17:49:19,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2021-12-06 17:49:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.025) internal successors, (164), 160 states have internal predecessors, (164), 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) [2021-12-06 17:49:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2021-12-06 17:49:19,615 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 152 [2021-12-06 17:49:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:19,615 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2021-12-06 17:49:19,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.645161290322581) internal successors, (175), 31 states have internal predecessors, (175), 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) [2021-12-06 17:49:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2021-12-06 17:49:19,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-06 17:49:19,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:19,619 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:19,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 17:49:19,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:19,820 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:19,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash 134226507, now seen corresponding path program 29 times [2021-12-06 17:49:19,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:19,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852758048] [2021-12-06 17:49:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:19,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1178 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:20,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:20,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852758048] [2021-12-06 17:49:20,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852758048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:20,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774424344] [2021-12-06 17:49:20,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:49:20,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:20,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:20,368 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:20,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 17:49:20,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-06 17:49:20,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:20,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 17:49:20,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1250 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:21,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1250 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:21,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774424344] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:21,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:21,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 83 [2021-12-06 17:49:21,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699290797] [2021-12-06 17:49:21,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:21,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-06 17:49:21,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:21,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-06 17:49:21,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1570, Invalid=5236, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 17:49:21,415 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand has 83 states, 83 states have (on average 3.3373493975903616) internal successors, (277), 83 states have internal predecessors, (277), 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) [2021-12-06 17:49:22,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:22,259 INFO L93 Difference]: Finished difference Result 475 states and 532 transitions. [2021-12-06 17:49:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-06 17:49:22,260 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.3373493975903616) internal successors, (277), 83 states have internal predecessors, (277), 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 160 [2021-12-06 17:49:22,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:22,261 INFO L225 Difference]: With dead ends: 475 [2021-12-06 17:49:22,261 INFO L226 Difference]: Without dead ends: 269 [2021-12-06 17:49:22,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4316 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4351, Invalid=13471, Unknown=0, NotChecked=0, Total=17822 [2021-12-06 17:49:22,262 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 410 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:22,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 799 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:49:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-06 17:49:22,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 165. [2021-12-06 17:49:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 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) [2021-12-06 17:49:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2021-12-06 17:49:22,272 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 160 [2021-12-06 17:49:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:22,272 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2021-12-06 17:49:22,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.3373493975903616) internal successors, (277), 83 states have internal predecessors, (277), 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) [2021-12-06 17:49:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2021-12-06 17:49:22,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-06 17:49:22,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:22,273 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:22,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 17:49:22,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:22,474 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:22,475 INFO L85 PathProgramCache]: Analyzing trace with hash 24503893, now seen corresponding path program 30 times [2021-12-06 17:49:22,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:22,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804732473] [2021-12-06 17:49:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:22,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 650 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:22,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:22,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804732473] [2021-12-06 17:49:22,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804732473] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:22,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308870346] [2021-12-06 17:49:22,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:49:22,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:22,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:22,771 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:22,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 17:49:22,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-12-06 17:49:22,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:22,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 17:49:22,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:23,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:23,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308870346] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:23,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:23,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 33 [2021-12-06 17:49:23,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095846623] [2021-12-06 17:49:23,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:23,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 17:49:23,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:23,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 17:49:23,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 17:49:23,197 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 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) [2021-12-06 17:49:23,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:23,490 INFO L93 Difference]: Finished difference Result 182 states and 186 transitions. [2021-12-06 17:49:23,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 17:49:23,490 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 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 164 [2021-12-06 17:49:23,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:23,491 INFO L225 Difference]: With dead ends: 182 [2021-12-06 17:49:23,491 INFO L226 Difference]: Without dead ends: 180 [2021-12-06 17:49:23,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1372, Invalid=2410, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 17:49:23,492 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 154 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:23,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 277 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:49:23,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-06 17:49:23,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2021-12-06 17:49:23,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 172 states have internal predecessors, (176), 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) [2021-12-06 17:49:23,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2021-12-06 17:49:23,502 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 164 [2021-12-06 17:49:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:23,502 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2021-12-06 17:49:23,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 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) [2021-12-06 17:49:23,502 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2021-12-06 17:49:23,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-06 17:49:23,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:23,503 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:23,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-06 17:49:23,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:23,704 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:23,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:23,705 INFO L85 PathProgramCache]: Analyzing trace with hash 481628987, now seen corresponding path program 31 times [2021-12-06 17:49:23,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:23,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916990980] [2021-12-06 17:49:23,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:23,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1380 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:24,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:24,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916990980] [2021-12-06 17:49:24,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916990980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:24,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232934369] [2021-12-06 17:49:24,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:49:24,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:24,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:24,282 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:24,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 17:49:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:24,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 17:49:24,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:49:25,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:49:25,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232934369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:25,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:25,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 86 [2021-12-06 17:49:25,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445745544] [2021-12-06 17:49:25,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:25,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-06 17:49:25,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:25,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-06 17:49:25,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1656, Invalid=5654, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 17:49:25,373 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand has 86 states, 86 states have (on average 3.3488372093023258) internal successors, (288), 86 states have internal predecessors, (288), 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) [2021-12-06 17:49:25,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:25,902 INFO L93 Difference]: Finished difference Result 396 states and 454 transitions. [2021-12-06 17:49:25,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 17:49:25,902 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.3488372093023258) internal successors, (288), 86 states have internal predecessors, (288), 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 172 [2021-12-06 17:49:25,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:25,904 INFO L225 Difference]: With dead ends: 396 [2021-12-06 17:49:25,904 INFO L226 Difference]: Without dead ends: 283 [2021-12-06 17:49:25,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2822 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3170, Invalid=9486, Unknown=0, NotChecked=0, Total=12656 [2021-12-06 17:49:25,905 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 464 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:25,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 509 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:49:25,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-12-06 17:49:25,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 175. [2021-12-06 17:49:25,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0229885057471264) internal successors, (178), 174 states have internal predecessors, (178), 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) [2021-12-06 17:49:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2021-12-06 17:49:25,915 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 172 [2021-12-06 17:49:25,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:25,915 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2021-12-06 17:49:25,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.3488372093023258) internal successors, (288), 86 states have internal predecessors, (288), 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) [2021-12-06 17:49:25,915 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2021-12-06 17:49:25,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-06 17:49:25,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:25,916 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:25,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 17:49:26,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 17:49:26,117 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:26,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:26,117 INFO L85 PathProgramCache]: Analyzing trace with hash -2129825696, now seen corresponding path program 32 times [2021-12-06 17:49:26,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:26,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853398282] [2021-12-06 17:49:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:26,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1380 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:26,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:26,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853398282] [2021-12-06 17:49:26,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853398282] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:26,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381555386] [2021-12-06 17:49:26,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:49:26,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:26,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:26,722 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:26,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 17:49:26,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:49:26,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:26,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 17:49:26,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 756 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:27,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 756 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:27,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381555386] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:27,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:27,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 31, 31] total 87 [2021-12-06 17:49:27,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289804900] [2021-12-06 17:49:27,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:27,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-06 17:49:27,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:27,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-06 17:49:27,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1278, Invalid=6204, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 17:49:27,655 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 87 states, 87 states have (on average 3.9770114942528734) internal successors, (346), 87 states have internal predecessors, (346), 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) [2021-12-06 17:49:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:29,349 INFO L93 Difference]: Finished difference Result 411 states and 472 transitions. [2021-12-06 17:49:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-12-06 17:49:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.9770114942528734) internal successors, (346), 87 states have internal predecessors, (346), 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 174 [2021-12-06 17:49:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:29,351 INFO L225 Difference]: With dead ends: 411 [2021-12-06 17:49:29,351 INFO L226 Difference]: Without dead ends: 296 [2021-12-06 17:49:29,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13146 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6376, Invalid=33026, Unknown=0, NotChecked=0, Total=39402 [2021-12-06 17:49:29,353 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 749 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 2143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:29,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 423 Invalid, 2143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:49:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-06 17:49:29,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 181. [2021-12-06 17:49:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 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) [2021-12-06 17:49:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2021-12-06 17:49:29,367 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 174 [2021-12-06 17:49:29,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:29,367 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2021-12-06 17:49:29,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.9770114942528734) internal successors, (346), 87 states have internal predecessors, (346), 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) [2021-12-06 17:49:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2021-12-06 17:49:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-06 17:49:29,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:29,368 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:29,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 17:49:29,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 17:49:29,568 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:29,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:29,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1983684472, now seen corresponding path program 33 times [2021-12-06 17:49:29,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:29,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542460413] [2021-12-06 17:49:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:29,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1487 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:30,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:30,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542460413] [2021-12-06 17:49:30,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542460413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:30,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768817260] [2021-12-06 17:49:30,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:49:30,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:30,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:30,234 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:30,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 17:49:30,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2021-12-06 17:49:30,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:30,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 17:49:30,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1568 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:31,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1568 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:31,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768817260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:31,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:31,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 91 [2021-12-06 17:49:31,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429153979] [2021-12-06 17:49:31,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:31,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-06 17:49:31,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:31,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-06 17:49:31,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1863, Invalid=6327, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 17:49:31,466 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 91 states, 91 states have (on average 3.2967032967032965) internal successors, (300), 91 states have internal predecessors, (300), 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) [2021-12-06 17:49:32,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:32,114 INFO L93 Difference]: Finished difference Result 418 states and 480 transitions. [2021-12-06 17:49:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 17:49:32,114 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.2967032967032965) internal successors, (300), 91 states have internal predecessors, (300), 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 180 [2021-12-06 17:49:32,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:32,116 INFO L225 Difference]: With dead ends: 418 [2021-12-06 17:49:32,116 INFO L226 Difference]: Without dead ends: 299 [2021-12-06 17:49:32,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3148 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3605, Invalid=10675, Unknown=0, NotChecked=0, Total=14280 [2021-12-06 17:49:32,117 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 433 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:32,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 727 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:49:32,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-12-06 17:49:32,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 183. [2021-12-06 17:49:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.021978021978022) internal successors, (186), 182 states have internal predecessors, (186), 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) [2021-12-06 17:49:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2021-12-06 17:49:32,128 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 180 [2021-12-06 17:49:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:32,128 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2021-12-06 17:49:32,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.2967032967032965) internal successors, (300), 91 states have internal predecessors, (300), 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) [2021-12-06 17:49:32,128 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2021-12-06 17:49:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-06 17:49:32,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:32,129 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:32,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 17:49:32,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:32,330 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:32,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:32,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1288439709, now seen corresponding path program 34 times [2021-12-06 17:49:32,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:32,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953792334] [2021-12-06 17:49:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:32,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2438 backedges. 812 proven. 1626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:32,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:32,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953792334] [2021-12-06 17:49:32,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953792334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:32,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108773843] [2021-12-06 17:49:32,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:49:32,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:32,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:32,655 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:32,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 17:49:32,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:49:32,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:32,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 17:49:32,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2438 backedges. 870 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:32,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2438 backedges. 870 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:33,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108773843] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:33,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:33,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 36 [2021-12-06 17:49:33,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330172238] [2021-12-06 17:49:33,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:33,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 17:49:33,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:33,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 17:49:33,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=723, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 17:49:33,084 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 36 states, 36 states have (on average 5.694444444444445) internal successors, (205), 36 states have internal predecessors, (205), 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) [2021-12-06 17:49:33,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:33,381 INFO L93 Difference]: Finished difference Result 200 states and 204 transitions. [2021-12-06 17:49:33,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 17:49:33,382 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.694444444444445) internal successors, (205), 36 states have internal predecessors, (205), 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 182 [2021-12-06 17:49:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:33,382 INFO L225 Difference]: With dead ends: 200 [2021-12-06 17:49:33,383 INFO L226 Difference]: Without dead ends: 198 [2021-12-06 17:49:33,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 388 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1657, Invalid=2899, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 17:49:33,383 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 202 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:33,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 256 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:49:33,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-06 17:49:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 191. [2021-12-06 17:49:33,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0210526315789474) internal successors, (194), 190 states have internal predecessors, (194), 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) [2021-12-06 17:49:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 194 transitions. [2021-12-06 17:49:33,394 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 194 transitions. Word has length 182 [2021-12-06 17:49:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:33,394 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 194 transitions. [2021-12-06 17:49:33,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.694444444444445) internal successors, (205), 36 states have internal predecessors, (205), 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) [2021-12-06 17:49:33,395 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 194 transitions. [2021-12-06 17:49:33,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 17:49:33,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:33,395 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:33,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 17:49:33,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:33,596 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:33,597 INFO L85 PathProgramCache]: Analyzing trace with hash 932801667, now seen corresponding path program 35 times [2021-12-06 17:49:33,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:33,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020813054] [2021-12-06 17:49:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:33,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 1713 proven. 957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:34,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:34,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020813054] [2021-12-06 17:49:34,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020813054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:34,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448504475] [2021-12-06 17:49:34,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:49:34,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:34,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:34,275 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:34,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 17:49:34,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-12-06 17:49:34,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:34,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 17:49:34,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 1800 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:35,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 1800 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:35,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448504475] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:35,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:35,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 98 [2021-12-06 17:49:35,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821205162] [2021-12-06 17:49:35,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:35,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-06 17:49:35,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:35,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-06 17:49:35,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2180, Invalid=7326, Unknown=0, NotChecked=0, Total=9506 [2021-12-06 17:49:35,686 INFO L87 Difference]: Start difference. First operand 191 states and 194 transitions. Second operand has 98 states, 98 states have (on average 3.336734693877551) internal successors, (327), 98 states have internal predecessors, (327), 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) [2021-12-06 17:49:36,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:36,802 INFO L93 Difference]: Finished difference Result 565 states and 632 transitions. [2021-12-06 17:49:36,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-06 17:49:36,802 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.336734693877551) internal successors, (327), 98 states have internal predecessors, (327), 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 190 [2021-12-06 17:49:36,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:36,803 INFO L225 Difference]: With dead ends: 565 [2021-12-06 17:49:36,803 INFO L226 Difference]: Without dead ends: 319 [2021-12-06 17:49:36,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6081 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6116, Invalid=19006, Unknown=0, NotChecked=0, Total=25122 [2021-12-06 17:49:36,805 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 519 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:36,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 933 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:49:36,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-12-06 17:49:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 195. [2021-12-06 17:49:36,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0206185567010309) internal successors, (198), 194 states have internal predecessors, (198), 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) [2021-12-06 17:49:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2021-12-06 17:49:36,821 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 190 [2021-12-06 17:49:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:36,821 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2021-12-06 17:49:36,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.336734693877551) internal successors, (327), 98 states have internal predecessors, (327), 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) [2021-12-06 17:49:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2021-12-06 17:49:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-06 17:49:36,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:36,822 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:36,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-06 17:49:37,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 17:49:37,023 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:37,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:37,023 INFO L85 PathProgramCache]: Analyzing trace with hash 12059405, now seen corresponding path program 36 times [2021-12-06 17:49:37,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:37,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550638582] [2021-12-06 17:49:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:37,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 930 proven. 1862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:37,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:37,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550638582] [2021-12-06 17:49:37,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550638582] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:37,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354649230] [2021-12-06 17:49:37,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:49:37,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:37,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:37,345 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:37,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 17:49:37,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-12-06 17:49:37,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:37,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 17:49:37,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 992 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:37,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 992 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:37,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354649230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:37,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:37,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 38 [2021-12-06 17:49:37,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641584143] [2021-12-06 17:49:37,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:37,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 17:49:37,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:37,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 17:49:37,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=802, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 17:49:37,874 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 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) [2021-12-06 17:49:38,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:38,210 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2021-12-06 17:49:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 17:49:38,210 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 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 194 [2021-12-06 17:49:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:38,211 INFO L225 Difference]: With dead ends: 212 [2021-12-06 17:49:38,211 INFO L226 Difference]: Without dead ends: 210 [2021-12-06 17:49:38,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 414 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1862, Invalid=3250, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 17:49:38,212 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 243 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:38,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 286 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:49:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-06 17:49:38,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2021-12-06 17:49:38,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0198019801980198) internal successors, (206), 202 states have internal predecessors, (206), 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) [2021-12-06 17:49:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2021-12-06 17:49:38,224 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 194 [2021-12-06 17:49:38,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:38,224 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2021-12-06 17:49:38,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 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) [2021-12-06 17:49:38,224 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2021-12-06 17:49:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-06 17:49:38,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:38,225 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:38,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-06 17:49:38,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 17:49:38,426 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:38,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:38,427 INFO L85 PathProgramCache]: Analyzing trace with hash -951388173, now seen corresponding path program 37 times [2021-12-06 17:49:38,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:38,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271699170] [2021-12-06 17:49:38,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:38,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 1955 proven. 1085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:39,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:39,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271699170] [2021-12-06 17:49:39,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271699170] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:39,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510547269] [2021-12-06 17:49:39,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:49:39,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:39,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:39,225 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:39,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 17:49:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:39,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-06 17:49:39,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 2046 proven. 992 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:49:40,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 2046 proven. 992 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:49:40,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510547269] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:40,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:40,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 101 [2021-12-06 17:49:40,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543035120] [2021-12-06 17:49:40,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:40,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-06 17:49:40,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:40,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-06 17:49:40,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2281, Invalid=7819, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 17:49:40,587 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 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) [2021-12-06 17:49:41,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:41,394 INFO L93 Difference]: Finished difference Result 466 states and 534 transitions. [2021-12-06 17:49:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 17:49:41,395 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 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 202 [2021-12-06 17:49:41,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:41,396 INFO L225 Difference]: With dead ends: 466 [2021-12-06 17:49:41,396 INFO L226 Difference]: Without dead ends: 333 [2021-12-06 17:49:41,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3907 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4395, Invalid=13161, Unknown=0, NotChecked=0, Total=17556 [2021-12-06 17:49:41,397 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 457 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:41,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 848 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:49:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-06 17:49:41,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 205. [2021-12-06 17:49:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 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) [2021-12-06 17:49:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2021-12-06 17:49:41,410 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 202 [2021-12-06 17:49:41,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:41,410 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2021-12-06 17:49:41,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 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) [2021-12-06 17:49:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2021-12-06 17:49:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-06 17:49:41,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:41,411 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:41,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 17:49:41,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 17:49:41,612 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:41,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:41,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1744337320, now seen corresponding path program 38 times [2021-12-06 17:49:41,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:41,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851461086] [2021-12-06 17:49:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:41,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 1955 proven. 1149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:42,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851461086] [2021-12-06 17:49:42,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851461086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382582979] [2021-12-06 17:49:42,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:49:42,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:42,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:42,467 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:42,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 17:49:42,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:49:42,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:42,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 17:49:42,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 2048 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:43,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 2048 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:44,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382582979] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:44,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:44,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 103 [2021-12-06 17:49:44,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97035511] [2021-12-06 17:49:44,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:44,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-12-06 17:49:44,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:44,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-12-06 17:49:44,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2383, Invalid=8123, Unknown=0, NotChecked=0, Total=10506 [2021-12-06 17:49:44,038 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 103 states, 103 states have (on average 3.3009708737864076) internal successors, (340), 103 states have internal predecessors, (340), 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) [2021-12-06 17:49:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:44,857 INFO L93 Difference]: Finished difference Result 474 states and 544 transitions. [2021-12-06 17:49:44,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-06 17:49:44,858 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.3009708737864076) internal successors, (340), 103 states have internal predecessors, (340), 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 204 [2021-12-06 17:49:44,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:44,859 INFO L225 Difference]: With dead ends: 474 [2021-12-06 17:49:44,859 INFO L226 Difference]: Without dead ends: 339 [2021-12-06 17:49:44,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4046 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4629, Invalid=13731, Unknown=0, NotChecked=0, Total=18360 [2021-12-06 17:49:44,860 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 608 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:44,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 774 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:49:44,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-06 17:49:44,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 207. [2021-12-06 17:49:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0194174757281553) internal successors, (210), 206 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) [2021-12-06 17:49:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2021-12-06 17:49:44,877 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 204 [2021-12-06 17:49:44,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:44,877 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2021-12-06 17:49:44,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.3009708737864076) internal successors, (340), 103 states have internal predecessors, (340), 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) [2021-12-06 17:49:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2021-12-06 17:49:44,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-06 17:49:44,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:44,878 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:44,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-06 17:49:45,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:45,080 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:45,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:45,081 INFO L85 PathProgramCache]: Analyzing trace with hash 735711101, now seen corresponding path program 39 times [2021-12-06 17:49:45,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:45,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685023140] [2021-12-06 17:49:45,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:45,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1056 proven. 2114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:45,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:45,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685023140] [2021-12-06 17:49:45,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685023140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:45,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386849272] [2021-12-06 17:49:45,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:49:45,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:45,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:45,467 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:45,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 17:49:45,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-12-06 17:49:45,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:45,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 17:49:45,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1122 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:45,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1122 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:46,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386849272] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:46,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:46,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 40 [2021-12-06 17:49:46,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489820109] [2021-12-06 17:49:46,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:46,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 17:49:46,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:46,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 17:49:46,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=885, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 17:49:46,008 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand has 40 states, 40 states have (on average 5.725) internal successors, (229), 40 states have internal predecessors, (229), 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) [2021-12-06 17:49:46,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:46,411 INFO L93 Difference]: Finished difference Result 224 states and 228 transitions. [2021-12-06 17:49:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-06 17:49:46,411 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.725) internal successors, (229), 40 states have internal predecessors, (229), 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 206 [2021-12-06 17:49:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:46,412 INFO L225 Difference]: With dead ends: 224 [2021-12-06 17:49:46,412 INFO L226 Difference]: Without dead ends: 222 [2021-12-06 17:49:46,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 440 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2079, Invalid=3621, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 17:49:46,413 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 257 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:46,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 294 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:49:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-06 17:49:46,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2021-12-06 17:49:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0186915887850467) internal successors, (218), 214 states have internal predecessors, (218), 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) [2021-12-06 17:49:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 218 transitions. [2021-12-06 17:49:46,428 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 218 transitions. Word has length 206 [2021-12-06 17:49:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:46,428 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 218 transitions. [2021-12-06 17:49:46,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.725) internal successors, (229), 40 states have internal predecessors, (229), 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) [2021-12-06 17:49:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 218 transitions. [2021-12-06 17:49:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-06 17:49:46,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:46,429 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:46,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 17:49:46,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-06 17:49:46,630 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:46,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:46,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1013869469, now seen corresponding path program 40 times [2021-12-06 17:49:46,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:46,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877112050] [2021-12-06 17:49:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:46,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2213 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:47,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:47,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877112050] [2021-12-06 17:49:47,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877112050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:47,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624386919] [2021-12-06 17:49:47,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:49:47,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:47,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:47,600 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:47,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 17:49:47,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:49:47,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:47,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 17:49:47,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2312 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:48,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2312 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:49,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624386919] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:49,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:49,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 110 [2021-12-06 17:49:49,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53866907] [2021-12-06 17:49:49,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:49,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-06 17:49:49,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-06 17:49:49,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2740, Invalid=9250, Unknown=0, NotChecked=0, Total=11990 [2021-12-06 17:49:49,204 INFO L87 Difference]: Start difference. First operand 215 states and 218 transitions. Second operand has 110 states, 110 states have (on average 3.3363636363636364) internal successors, (367), 110 states have internal predecessors, (367), 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) [2021-12-06 17:49:50,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:50,606 INFO L93 Difference]: Finished difference Result 637 states and 712 transitions. [2021-12-06 17:49:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-06 17:49:50,606 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.3363636363636364) internal successors, (367), 110 states have internal predecessors, (367), 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 214 [2021-12-06 17:49:50,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:50,607 INFO L225 Difference]: With dead ends: 637 [2021-12-06 17:49:50,607 INFO L226 Difference]: Without dead ends: 359 [2021-12-06 17:49:50,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7709 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7744, Invalid=24118, Unknown=0, NotChecked=0, Total=31862 [2021-12-06 17:49:50,609 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 563 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:50,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 1018 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:49:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-12-06 17:49:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 219. [2021-12-06 17:49:50,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.018348623853211) internal successors, (222), 218 states have internal predecessors, (222), 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) [2021-12-06 17:49:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2021-12-06 17:49:50,624 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 214 [2021-12-06 17:49:50,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:50,624 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2021-12-06 17:49:50,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.3363636363636364) internal successors, (367), 110 states have internal predecessors, (367), 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) [2021-12-06 17:49:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2021-12-06 17:49:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-06 17:49:50,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:50,626 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:50,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 17:49:50,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-06 17:49:50,827 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:50,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:50,828 INFO L85 PathProgramCache]: Analyzing trace with hash 567782637, now seen corresponding path program 41 times [2021-12-06 17:49:50,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:50,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000667712] [2021-12-06 17:49:50,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:50,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1190 proven. 2382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:51,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:51,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000667712] [2021-12-06 17:49:51,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000667712] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:51,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823813928] [2021-12-06 17:49:51,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:49:51,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:51,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:51,240 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:51,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 17:49:51,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-12-06 17:49:51,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:51,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 17:49:51,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1260 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:51,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1260 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:51,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823813928] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:51,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:51,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 42 [2021-12-06 17:49:51,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089705076] [2021-12-06 17:49:51,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:51,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 17:49:51,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:51,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 17:49:51,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=972, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 17:49:51,769 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 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) [2021-12-06 17:49:52,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:52,166 INFO L93 Difference]: Finished difference Result 236 states and 240 transitions. [2021-12-06 17:49:52,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-06 17:49:52,166 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 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 218 [2021-12-06 17:49:52,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:52,167 INFO L225 Difference]: With dead ends: 236 [2021-12-06 17:49:52,167 INFO L226 Difference]: Without dead ends: 234 [2021-12-06 17:49:52,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 466 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2308, Invalid=4012, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 17:49:52,168 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 193 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:52,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 417 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:49:52,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-06 17:49:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 227. [2021-12-06 17:49:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.0176991150442478) internal successors, (230), 226 states have internal predecessors, (230), 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) [2021-12-06 17:49:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 230 transitions. [2021-12-06 17:49:52,182 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 230 transitions. Word has length 218 [2021-12-06 17:49:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:52,183 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 230 transitions. [2021-12-06 17:49:52,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 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) [2021-12-06 17:49:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 230 transitions. [2021-12-06 17:49:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-06 17:49:52,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:52,184 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:52,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-06 17:49:52,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-06 17:49:52,385 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:52,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:52,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1116914131, now seen corresponding path program 42 times [2021-12-06 17:49:52,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:52,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335332065] [2021-12-06 17:49:52,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:52,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2487 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:53,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:53,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335332065] [2021-12-06 17:49:53,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335332065] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:53,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344027548] [2021-12-06 17:49:53,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:49:53,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:53,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:53,322 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:53,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 17:49:53,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-12-06 17:49:53,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:53,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 17:49:53,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2592 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:54,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2592 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:55,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344027548] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:55,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:55,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 116 [2021-12-06 17:49:55,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508781007] [2021-12-06 17:49:55,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:55,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-06 17:49:55,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:55,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-06 17:49:55,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3044, Invalid=10296, Unknown=0, NotChecked=0, Total=13340 [2021-12-06 17:49:55,141 INFO L87 Difference]: Start difference. First operand 227 states and 230 transitions. Second operand has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 states have internal predecessors, (387), 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) [2021-12-06 17:49:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:56,647 INFO L93 Difference]: Finished difference Result 673 states and 752 transitions. [2021-12-06 17:49:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-12-06 17:49:56,648 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 states have internal predecessors, (387), 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 226 [2021-12-06 17:49:56,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:56,649 INFO L225 Difference]: With dead ends: 673 [2021-12-06 17:49:56,649 INFO L226 Difference]: Without dead ends: 379 [2021-12-06 17:49:56,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8595 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=8630, Invalid=26902, Unknown=0, NotChecked=0, Total=35532 [2021-12-06 17:49:56,651 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 646 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:56,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 1049 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:49:56,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-12-06 17:49:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 231. [2021-12-06 17:49:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.017391304347826) internal successors, (234), 230 states have internal predecessors, (234), 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) [2021-12-06 17:49:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 234 transitions. [2021-12-06 17:49:56,666 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 234 transitions. Word has length 226 [2021-12-06 17:49:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:56,667 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 234 transitions. [2021-12-06 17:49:56,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 states have internal predecessors, (387), 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) [2021-12-06 17:49:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 234 transitions. [2021-12-06 17:49:56,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-06 17:49:56,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:56,668 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:56,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-06 17:49:56,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:56,869 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:56,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1125538653, now seen corresponding path program 43 times [2021-12-06 17:49:56,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:56,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181040680] [2021-12-06 17:49:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:56,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1332 proven. 2666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:57,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:57,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181040680] [2021-12-06 17:49:57,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181040680] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:57,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111638116] [2021-12-06 17:49:57,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:49:57,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:57,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:57,307 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:57,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 17:49:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:57,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 17:49:57,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1406 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:57,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1406 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:57,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111638116] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:57,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:57,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 44 [2021-12-06 17:49:57,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540738297] [2021-12-06 17:49:57,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:57,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 17:49:57,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:57,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 17:49:57,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=1063, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 17:49:57,838 INFO L87 Difference]: Start difference. First operand 231 states and 234 transitions. Second operand has 44 states, 44 states have (on average 5.75) internal successors, (253), 44 states have internal predecessors, (253), 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) [2021-12-06 17:49:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:58,245 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2021-12-06 17:49:58,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-12-06 17:49:58,245 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.75) internal successors, (253), 44 states have internal predecessors, (253), 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 230 [2021-12-06 17:49:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:58,246 INFO L225 Difference]: With dead ends: 248 [2021-12-06 17:49:58,247 INFO L226 Difference]: Without dead ends: 246 [2021-12-06 17:49:58,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 492 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2549, Invalid=4423, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 17:49:58,247 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 285 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:58,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 330 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:49:58,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-06 17:49:58,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 239. [2021-12-06 17:49:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0168067226890756) internal successors, (242), 238 states have internal predecessors, (242), 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) [2021-12-06 17:49:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 242 transitions. [2021-12-06 17:49:58,263 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 242 transitions. Word has length 230 [2021-12-06 17:49:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:58,263 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 242 transitions. [2021-12-06 17:49:58,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.75) internal successors, (253), 44 states have internal predecessors, (253), 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) [2021-12-06 17:49:58,263 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 242 transitions. [2021-12-06 17:49:58,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-06 17:49:58,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:58,264 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:58,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-06 17:49:58,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-06 17:49:58,465 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:58,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:58,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1489764285, now seen corresponding path program 44 times [2021-12-06 17:49:58,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:58,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057145102] [2021-12-06 17:49:58,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:58,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2777 proven. 1517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:59,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:59,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057145102] [2021-12-06 17:49:59,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057145102] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:59,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969138736] [2021-12-06 17:49:59,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:49:59,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:59,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:59,503 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:59,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 17:49:59,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:49:59,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:59,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-06 17:49:59,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2886 proven. 1406 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:50:01,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2886 proven. 1406 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:50:01,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969138736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:01,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:01,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 119 [2021-12-06 17:50:01,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130050141] [2021-12-06 17:50:01,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:01,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-06 17:50:01,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:01,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-06 17:50:01,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3163, Invalid=10879, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 17:50:01,389 INFO L87 Difference]: Start difference. First operand 239 states and 242 transitions. Second operand has 119 states, 119 states have (on average 3.3445378151260505) internal successors, (398), 119 states have internal predecessors, (398), 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) [2021-12-06 17:50:02,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:02,396 INFO L93 Difference]: Finished difference Result 550 states and 630 transitions. [2021-12-06 17:50:02,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-06 17:50:02,397 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.3445378151260505) internal successors, (398), 119 states have internal predecessors, (398), 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 238 [2021-12-06 17:50:02,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:02,398 INFO L225 Difference]: With dead ends: 550 [2021-12-06 17:50:02,398 INFO L226 Difference]: Without dead ends: 393 [2021-12-06 17:50:02,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5440 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6129, Invalid=18363, Unknown=0, NotChecked=0, Total=24492 [2021-12-06 17:50:02,400 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 552 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:02,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 903 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:50:02,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-06 17:50:02,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 241. [2021-12-06 17:50:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0166666666666666) internal successors, (244), 240 states have internal predecessors, (244), 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) [2021-12-06 17:50:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 244 transitions. [2021-12-06 17:50:02,416 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 244 transitions. Word has length 238 [2021-12-06 17:50:02,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:02,416 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 244 transitions. [2021-12-06 17:50:02,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.3445378151260505) internal successors, (398), 119 states have internal predecessors, (398), 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) [2021-12-06 17:50:02,416 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 244 transitions. [2021-12-06 17:50:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-06 17:50:02,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:02,417 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:02,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-12-06 17:50:02,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 17:50:02,618 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:02,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1569193944, now seen corresponding path program 45 times [2021-12-06 17:50:02,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:02,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121912222] [2021-12-06 17:50:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:02,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2777 proven. 1593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:03,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:03,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121912222] [2021-12-06 17:50:03,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121912222] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:03,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717255960] [2021-12-06 17:50:03,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:50:03,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:03,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:03,716 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:03,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 17:50:03,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-12-06 17:50:03,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:03,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-06 17:50:03,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2888 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:05,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2888 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:05,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717255960] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:05,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:05,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 121 [2021-12-06 17:50:05,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363673245] [2021-12-06 17:50:05,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:05,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-12-06 17:50:05,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:05,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-12-06 17:50:05,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3283, Invalid=11237, Unknown=0, NotChecked=0, Total=14520 [2021-12-06 17:50:05,703 INFO L87 Difference]: Start difference. First operand 241 states and 244 transitions. Second operand has 121 states, 121 states have (on average 3.3057851239669422) internal successors, (400), 121 states have internal predecessors, (400), 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) [2021-12-06 17:50:06,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:06,747 INFO L93 Difference]: Finished difference Result 558 states and 640 transitions. [2021-12-06 17:50:06,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-06 17:50:06,748 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.3057851239669422) internal successors, (400), 121 states have internal predecessors, (400), 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 240 [2021-12-06 17:50:06,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:06,749 INFO L225 Difference]: With dead ends: 558 [2021-12-06 17:50:06,749 INFO L226 Difference]: Without dead ends: 399 [2021-12-06 17:50:06,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5603 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6405, Invalid=19035, Unknown=0, NotChecked=0, Total=25440 [2021-12-06 17:50:06,751 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 536 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:06,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 890 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:50:06,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-12-06 17:50:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 243. [2021-12-06 17:50:06,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0165289256198347) internal successors, (246), 242 states have internal predecessors, (246), 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) [2021-12-06 17:50:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 246 transitions. [2021-12-06 17:50:06,768 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 246 transitions. Word has length 240 [2021-12-06 17:50:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:06,768 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 246 transitions. [2021-12-06 17:50:06,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.3057851239669422) internal successors, (400), 121 states have internal predecessors, (400), 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) [2021-12-06 17:50:06,769 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 246 transitions. [2021-12-06 17:50:06,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-06 17:50:06,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:06,770 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:06,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-06 17:50:06,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-06 17:50:06,971 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:06,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:06,972 INFO L85 PathProgramCache]: Analyzing trace with hash -591684915, now seen corresponding path program 46 times [2021-12-06 17:50:06,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:06,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746035044] [2021-12-06 17:50:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:06,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1482 proven. 2966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:07,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:07,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746035044] [2021-12-06 17:50:07,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746035044] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:07,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816272095] [2021-12-06 17:50:07,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:50:07,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:07,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:07,475 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:07,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 17:50:07,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:50:07,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:07,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 17:50:07,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1560 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:07,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1560 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:08,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816272095] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:08,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:08,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 46 [2021-12-06 17:50:08,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522116766] [2021-12-06 17:50:08,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:08,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 17:50:08,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:08,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 17:50:08,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=1158, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 17:50:08,100 INFO L87 Difference]: Start difference. First operand 243 states and 246 transitions. Second operand has 46 states, 46 states have (on average 5.760869565217392) internal successors, (265), 46 states have internal predecessors, (265), 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) [2021-12-06 17:50:08,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:08,530 INFO L93 Difference]: Finished difference Result 260 states and 264 transitions. [2021-12-06 17:50:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-06 17:50:08,531 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.760869565217392) internal successors, (265), 46 states have internal predecessors, (265), 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 242 [2021-12-06 17:50:08,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:08,532 INFO L225 Difference]: With dead ends: 260 [2021-12-06 17:50:08,532 INFO L226 Difference]: Without dead ends: 258 [2021-12-06 17:50:08,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 518 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1947 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2802, Invalid=4854, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 17:50:08,533 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 258 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:08,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 372 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:50:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-06 17:50:08,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 251. [2021-12-06 17:50:08,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.016) internal successors, (254), 250 states have internal predecessors, (254), 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) [2021-12-06 17:50:08,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 254 transitions. [2021-12-06 17:50:08,549 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 254 transitions. Word has length 242 [2021-12-06 17:50:08,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:08,550 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 254 transitions. [2021-12-06 17:50:08,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.760869565217392) internal successors, (265), 46 states have internal predecessors, (265), 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) [2021-12-06 17:50:08,550 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 254 transitions. [2021-12-06 17:50:08,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-12-06 17:50:08,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:08,551 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:08,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-06 17:50:08,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-06 17:50:08,752 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:08,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:08,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2128949325, now seen corresponding path program 47 times [2021-12-06 17:50:08,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:08,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760773374] [2021-12-06 17:50:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:08,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3083 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:09,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:09,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760773374] [2021-12-06 17:50:09,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760773374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:09,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928479854] [2021-12-06 17:50:09,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:50:09,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:09,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:09,912 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:09,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 17:50:10,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2021-12-06 17:50:10,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:10,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-06 17:50:10,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3200 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:11,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3200 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:12,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928479854] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:12,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:12,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 128 [2021-12-06 17:50:12,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354282970] [2021-12-06 17:50:12,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:12,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-12-06 17:50:12,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:12,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-12-06 17:50:12,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3700, Invalid=12556, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 17:50:12,040 INFO L87 Difference]: Start difference. First operand 251 states and 254 transitions. Second operand has 128 states, 128 states have (on average 3.3359375) internal successors, (427), 128 states have internal predecessors, (427), 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) [2021-12-06 17:50:13,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:13,851 INFO L93 Difference]: Finished difference Result 745 states and 832 transitions. [2021-12-06 17:50:13,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-12-06 17:50:13,852 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.3359375) internal successors, (427), 128 states have internal predecessors, (427), 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 250 [2021-12-06 17:50:13,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:13,853 INFO L225 Difference]: With dead ends: 745 [2021-12-06 17:50:13,853 INFO L226 Difference]: Without dead ends: 419 [2021-12-06 17:50:13,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10511 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=10546, Invalid=32926, Unknown=0, NotChecked=0, Total=43472 [2021-12-06 17:50:13,855 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 788 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:13,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 1152 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:50:13,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-06 17:50:13,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 255. [2021-12-06 17:50:13,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.015748031496063) internal successors, (258), 254 states have internal predecessors, (258), 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) [2021-12-06 17:50:13,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 258 transitions. [2021-12-06 17:50:13,882 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 258 transitions. Word has length 250 [2021-12-06 17:50:13,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:13,883 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 258 transitions. [2021-12-06 17:50:13,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.3359375) internal successors, (427), 128 states have internal predecessors, (427), 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) [2021-12-06 17:50:13,883 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 258 transitions. [2021-12-06 17:50:13,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-12-06 17:50:13,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:13,884 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:13,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 17:50:14,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 17:50:14,086 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:14,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:14,087 INFO L85 PathProgramCache]: Analyzing trace with hash 145550141, now seen corresponding path program 48 times [2021-12-06 17:50:14,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:14,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438843316] [2021-12-06 17:50:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:14,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1640 proven. 3282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:14,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:14,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438843316] [2021-12-06 17:50:14,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438843316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:14,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878412955] [2021-12-06 17:50:14,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:50:14,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:14,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:14,640 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:14,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 17:50:14,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2021-12-06 17:50:14,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:14,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-06 17:50:14,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1722 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:15,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1722 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:15,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878412955] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:15,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:15,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 48 [2021-12-06 17:50:15,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332047460] [2021-12-06 17:50:15,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:15,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 17:50:15,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:15,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 17:50:15,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=1257, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 17:50:15,290 INFO L87 Difference]: Start difference. First operand 255 states and 258 transitions. Second operand has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 48 states have internal predecessors, (277), 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) [2021-12-06 17:50:15,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:15,834 INFO L93 Difference]: Finished difference Result 272 states and 276 transitions. [2021-12-06 17:50:15,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-06 17:50:15,834 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 48 states have internal predecessors, (277), 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 254 [2021-12-06 17:50:15,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:15,836 INFO L225 Difference]: With dead ends: 272 [2021-12-06 17:50:15,836 INFO L226 Difference]: Without dead ends: 270 [2021-12-06 17:50:15,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 544 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=3067, Invalid=5305, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 17:50:15,836 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 223 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:15,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 441 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:50:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-06 17:50:15,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 263. [2021-12-06 17:50:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.015267175572519) internal successors, (266), 262 states have internal predecessors, (266), 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) [2021-12-06 17:50:15,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 266 transitions. [2021-12-06 17:50:15,854 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 266 transitions. Word has length 254 [2021-12-06 17:50:15,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:15,855 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 266 transitions. [2021-12-06 17:50:15,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 48 states have internal predecessors, (277), 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) [2021-12-06 17:50:15,855 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 266 transitions. [2021-12-06 17:50:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-06 17:50:15,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:15,856 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:15,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-06 17:50:16,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-12-06 17:50:16,056 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:16,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:16,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1823256611, now seen corresponding path program 49 times [2021-12-06 17:50:16,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:16,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363745078] [2021-12-06 17:50:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:16,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3405 proven. 1845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:17,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:17,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363745078] [2021-12-06 17:50:17,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363745078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:17,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702892184] [2021-12-06 17:50:17,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:50:17,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:17,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:17,262 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:17,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 17:50:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:17,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-06 17:50:17,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3526 proven. 1722 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:50:19,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3526 proven. 1722 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:50:19,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702892184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:19,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:19,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 131 [2021-12-06 17:50:19,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612548732] [2021-12-06 17:50:19,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:19,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-12-06 17:50:19,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:19,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-12-06 17:50:19,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3831, Invalid=13199, Unknown=0, NotChecked=0, Total=17030 [2021-12-06 17:50:19,439 INFO L87 Difference]: Start difference. First operand 263 states and 266 transitions. Second operand has 131 states, 131 states have (on average 3.3435114503816794) internal successors, (438), 131 states have internal predecessors, (438), 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) [2021-12-06 17:50:20,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:20,617 INFO L93 Difference]: Finished difference Result 606 states and 694 transitions. [2021-12-06 17:50:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-06 17:50:20,617 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.3435114503816794) internal successors, (438), 131 states have internal predecessors, (438), 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 262 [2021-12-06 17:50:20,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:20,619 INFO L225 Difference]: With dead ends: 606 [2021-12-06 17:50:20,619 INFO L226 Difference]: Without dead ends: 433 [2021-12-06 17:50:20,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6602 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7445, Invalid=22311, Unknown=0, NotChecked=0, Total=29756 [2021-12-06 17:50:20,620 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 647 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:20,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 933 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:50:20,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-12-06 17:50:20,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 265. [2021-12-06 17:50:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0151515151515151) internal successors, (268), 264 states have internal predecessors, (268), 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) [2021-12-06 17:50:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 268 transitions. [2021-12-06 17:50:20,639 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 268 transitions. Word has length 262 [2021-12-06 17:50:20,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:20,639 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 268 transitions. [2021-12-06 17:50:20,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.3435114503816794) internal successors, (438), 131 states have internal predecessors, (438), 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) [2021-12-06 17:50:20,639 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 268 transitions. [2021-12-06 17:50:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-12-06 17:50:20,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:20,640 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:20,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-06 17:50:20,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:20,841 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:20,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:20,843 INFO L85 PathProgramCache]: Analyzing trace with hash -354905848, now seen corresponding path program 50 times [2021-12-06 17:50:20,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:20,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017387315] [2021-12-06 17:50:20,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:20,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 3405 proven. 1929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:22,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:22,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017387315] [2021-12-06 17:50:22,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017387315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:22,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490438497] [2021-12-06 17:50:22,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:50:22,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:22,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:22,126 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:22,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 17:50:22,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:50:22,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:22,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-06 17:50:22,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 1806 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:23,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 1806 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:23,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490438497] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:23,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:23,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 46, 46] total 132 [2021-12-06 17:50:23,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431292444] [2021-12-06 17:50:23,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:23,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-12-06 17:50:23,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:23,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-12-06 17:50:23,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=14364, Unknown=0, NotChecked=0, Total=17292 [2021-12-06 17:50:23,881 INFO L87 Difference]: Start difference. First operand 265 states and 268 transitions. Second operand has 132 states, 132 states have (on average 3.984848484848485) internal successors, (526), 132 states have internal predecessors, (526), 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) [2021-12-06 17:50:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:27,307 INFO L93 Difference]: Finished difference Result 621 states and 712 transitions. [2021-12-06 17:50:27,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-12-06 17:50:27,307 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 3.984848484848485) internal successors, (526), 132 states have internal predecessors, (526), 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 264 [2021-12-06 17:50:27,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:27,309 INFO L225 Difference]: With dead ends: 621 [2021-12-06 17:50:27,309 INFO L226 Difference]: Without dead ends: 446 [2021-12-06 17:50:27,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 526 SyntacticMatches, 1 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31476 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=14626, Invalid=77486, Unknown=0, NotChecked=0, Total=92112 [2021-12-06 17:50:27,313 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 1204 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 3066 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 3980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 3066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:27,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 881 Invalid, 3980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 3066 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:50:27,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-12-06 17:50:27,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 271. [2021-12-06 17:50:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.0148148148148148) internal successors, (274), 270 states have internal predecessors, (274), 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) [2021-12-06 17:50:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 274 transitions. [2021-12-06 17:50:27,344 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 274 transitions. Word has length 264 [2021-12-06 17:50:27,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:27,344 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 274 transitions. [2021-12-06 17:50:27,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 3.984848484848485) internal successors, (526), 132 states have internal predecessors, (526), 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) [2021-12-06 17:50:27,344 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 274 transitions. [2021-12-06 17:50:27,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-06 17:50:27,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:27,345 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:27,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-06 17:50:27,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:27,546 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:27,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:27,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2068373472, now seen corresponding path program 51 times [2021-12-06 17:50:27,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:27,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636864239] [2021-12-06 17:50:27,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:27,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 3572 proven. 2018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:28,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:28,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636864239] [2021-12-06 17:50:28,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636864239] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:28,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929057323] [2021-12-06 17:50:28,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:50:28,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:28,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:28,915 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:28,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 17:50:29,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2021-12-06 17:50:29,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:29,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-06 17:50:29,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 3698 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:31,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 3698 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:31,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929057323] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:31,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:31,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 136 [2021-12-06 17:50:31,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264893340] [2021-12-06 17:50:31,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:31,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-12-06 17:50:31,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:31,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-12-06 17:50:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4143, Invalid=14217, Unknown=0, NotChecked=0, Total=18360 [2021-12-06 17:50:31,278 INFO L87 Difference]: Start difference. First operand 271 states and 274 transitions. Second operand has 136 states, 136 states have (on average 3.3088235294117645) internal successors, (450), 136 states have internal predecessors, (450), 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) [2021-12-06 17:50:32,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:32,593 INFO L93 Difference]: Finished difference Result 628 states and 720 transitions. [2021-12-06 17:50:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-06 17:50:32,593 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 3.3088235294117645) internal successors, (450), 136 states have internal predecessors, (450), 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 270 [2021-12-06 17:50:32,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:32,595 INFO L225 Difference]: With dead ends: 628 [2021-12-06 17:50:32,595 INFO L226 Difference]: Without dead ends: 449 [2021-12-06 17:50:32,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7093 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8105, Invalid=24115, Unknown=0, NotChecked=0, Total=32220 [2021-12-06 17:50:32,596 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 806 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:32,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 945 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:50:32,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-12-06 17:50:32,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 273. [2021-12-06 17:50:32,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.0147058823529411) internal successors, (276), 272 states have internal predecessors, (276), 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) [2021-12-06 17:50:32,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 276 transitions. [2021-12-06 17:50:32,616 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 276 transitions. Word has length 270 [2021-12-06 17:50:32,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:32,617 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 276 transitions. [2021-12-06 17:50:32,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 3.3088235294117645) internal successors, (450), 136 states have internal predecessors, (450), 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) [2021-12-06 17:50:32,617 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 276 transitions. [2021-12-06 17:50:32,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-12-06 17:50:32,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:32,618 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:32,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-06 17:50:32,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:32,819 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:32,820 INFO L85 PathProgramCache]: Analyzing trace with hash 550243269, now seen corresponding path program 52 times [2021-12-06 17:50:32,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:32,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998372261] [2021-12-06 17:50:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:32,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5678 backedges. 1892 proven. 3786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:33,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:33,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998372261] [2021-12-06 17:50:33,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998372261] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:33,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576035660] [2021-12-06 17:50:33,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:50:33,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:33,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:33,407 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:33,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 17:50:33,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:50:33,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:33,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-06 17:50:33,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5678 backedges. 1980 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:33,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5678 backedges. 1980 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:34,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576035660] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:34,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:34,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 51 [2021-12-06 17:50:34,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488259928] [2021-12-06 17:50:34,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:34,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 17:50:34,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:34,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 17:50:34,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1137, Invalid=1413, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 17:50:34,002 INFO L87 Difference]: Start difference. First operand 273 states and 276 transitions. Second operand has 51 states, 51 states have (on average 5.784313725490196) internal successors, (295), 51 states have internal predecessors, (295), 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) [2021-12-06 17:50:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:34,545 INFO L93 Difference]: Finished difference Result 290 states and 294 transitions. [2021-12-06 17:50:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-06 17:50:34,545 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 5.784313725490196) internal successors, (295), 51 states have internal predecessors, (295), 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 272 [2021-12-06 17:50:34,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:34,546 INFO L225 Difference]: With dead ends: 290 [2021-12-06 17:50:34,546 INFO L226 Difference]: Without dead ends: 288 [2021-12-06 17:50:34,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 583 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2417 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3487, Invalid=6019, Unknown=0, NotChecked=0, Total=9506 [2021-12-06 17:50:34,547 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 196 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:34,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 479 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:50:34,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-12-06 17:50:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 281. [2021-12-06 17:50:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.0142857142857142) internal successors, (284), 280 states have internal predecessors, (284), 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) [2021-12-06 17:50:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 284 transitions. [2021-12-06 17:50:34,567 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 284 transitions. Word has length 272 [2021-12-06 17:50:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:34,567 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 284 transitions. [2021-12-06 17:50:34,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.784313725490196) internal successors, (295), 51 states have internal predecessors, (295), 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) [2021-12-06 17:50:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 284 transitions. [2021-12-06 17:50:34,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-12-06 17:50:34,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:34,568 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:34,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-06 17:50:34,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:34,769 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:34,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:34,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1208404139, now seen corresponding path program 53 times [2021-12-06 17:50:34,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:34,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949598925] [2021-12-06 17:50:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:34,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 3918 proven. 2112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:36,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:36,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949598925] [2021-12-06 17:50:36,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949598925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:36,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389299994] [2021-12-06 17:50:36,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:50:36,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:36,234 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:36,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-06 17:50:36,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-12-06 17:50:36,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:36,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-06 17:50:36,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 4050 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:38,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 4050 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:39,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389299994] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:39,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:39,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 143 [2021-12-06 17:50:39,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79884004] [2021-12-06 17:50:39,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:39,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2021-12-06 17:50:39,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:39,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-12-06 17:50:39,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4610, Invalid=15696, Unknown=0, NotChecked=0, Total=20306 [2021-12-06 17:50:39,039 INFO L87 Difference]: Start difference. First operand 281 states and 284 transitions. Second operand has 143 states, 143 states have (on average 3.335664335664336) internal successors, (477), 143 states have internal predecessors, (477), 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) [2021-12-06 17:50:41,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:41,453 INFO L93 Difference]: Finished difference Result 835 states and 932 transitions. [2021-12-06 17:50:41,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-12-06 17:50:41,453 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 3.335664335664336) internal successors, (477), 143 states have internal predecessors, (477), 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 280 [2021-12-06 17:50:41,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:41,455 INFO L225 Difference]: With dead ends: 835 [2021-12-06 17:50:41,455 INFO L226 Difference]: Without dead ends: 469 [2021-12-06 17:50:41,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13176 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=13211, Invalid=41311, Unknown=0, NotChecked=0, Total=54522 [2021-12-06 17:50:41,458 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 998 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:41,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [998 Valid, 1749 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 1897 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:50:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-12-06 17:50:41,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 285. [2021-12-06 17:50:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0140845070422535) internal successors, (288), 284 states have internal predecessors, (288), 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) [2021-12-06 17:50:41,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 288 transitions. [2021-12-06 17:50:41,490 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 288 transitions. Word has length 280 [2021-12-06 17:50:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:41,490 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 288 transitions. [2021-12-06 17:50:41,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 3.335664335664336) internal successors, (477), 143 states have internal predecessors, (477), 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) [2021-12-06 17:50:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 288 transitions. [2021-12-06 17:50:41,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-12-06 17:50:41,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:41,491 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:41,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-06 17:50:41,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-06 17:50:41,692 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:41,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:41,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1766615371, now seen corresponding path program 54 times [2021-12-06 17:50:41,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:41,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388453198] [2021-12-06 17:50:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:41,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2070 proven. 4142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:42,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:42,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388453198] [2021-12-06 17:50:42,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388453198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:42,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964323174] [2021-12-06 17:50:42,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:50:42,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:42,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:42,350 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:42,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-06 17:50:42,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-12-06 17:50:42,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:42,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-06 17:50:42,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2162 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:42,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2162 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:43,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964323174] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:43,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:43,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 53 [2021-12-06 17:50:43,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371755707] [2021-12-06 17:50:43,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:43,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 17:50:43,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:43,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 17:50:43,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1234, Invalid=1522, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 17:50:43,073 INFO L87 Difference]: Start difference. First operand 285 states and 288 transitions. Second operand has 53 states, 53 states have (on average 5.7924528301886795) internal successors, (307), 53 states have internal predecessors, (307), 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) [2021-12-06 17:50:43,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:43,671 INFO L93 Difference]: Finished difference Result 302 states and 306 transitions. [2021-12-06 17:50:43,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-06 17:50:43,671 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 5.7924528301886795) internal successors, (307), 53 states have internal predecessors, (307), 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 284 [2021-12-06 17:50:43,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:43,672 INFO L225 Difference]: With dead ends: 302 [2021-12-06 17:50:43,672 INFO L226 Difference]: Without dead ends: 300 [2021-12-06 17:50:43,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 609 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2619 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3782, Invalid=6520, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 17:50:43,673 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 256 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:43,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 449 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:50:43,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-06 17:50:43,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 293. [2021-12-06 17:50:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.0136986301369864) internal successors, (296), 292 states have internal predecessors, (296), 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) [2021-12-06 17:50:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 296 transitions. [2021-12-06 17:50:43,698 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 296 transitions. Word has length 284 [2021-12-06 17:50:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:43,699 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 296 transitions. [2021-12-06 17:50:43,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.7924528301886795) internal successors, (307), 53 states have internal predecessors, (307), 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) [2021-12-06 17:50:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 296 transitions. [2021-12-06 17:50:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-12-06 17:50:43,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:43,700 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:43,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-12-06 17:50:43,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-06 17:50:43,901 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:43,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:43,902 INFO L85 PathProgramCache]: Analyzing trace with hash -890477669, now seen corresponding path program 55 times [2021-12-06 17:50:43,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:43,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421841854] [2021-12-06 17:50:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:43,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4280 proven. 2300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:45,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:45,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421841854] [2021-12-06 17:50:45,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421841854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:45,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626676680] [2021-12-06 17:50:45,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:50:45,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:45,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:45,482 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:45,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-06 17:50:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:45,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 17:50:45,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4416 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:50:47,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4416 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:50:48,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626676680] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:48,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:48,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 146 [2021-12-06 17:50:48,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202874670] [2021-12-06 17:50:48,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:48,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2021-12-06 17:50:48,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:48,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-12-06 17:50:48,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4756, Invalid=16414, Unknown=0, NotChecked=0, Total=21170 [2021-12-06 17:50:48,011 INFO L87 Difference]: Start difference. First operand 293 states and 296 transitions. Second operand has 146 states, 146 states have (on average 3.3424657534246576) internal successors, (488), 146 states have internal predecessors, (488), 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) [2021-12-06 17:50:49,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:49,481 INFO L93 Difference]: Finished difference Result 676 states and 774 transitions. [2021-12-06 17:50:49,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-06 17:50:49,481 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 3.3424657534246576) internal successors, (488), 146 states have internal predecessors, (488), 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 292 [2021-12-06 17:50:49,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:49,483 INFO L225 Difference]: With dead ends: 676 [2021-12-06 17:50:49,483 INFO L226 Difference]: Without dead ends: 483 [2021-12-06 17:50:49,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8212 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9270, Invalid=27786, Unknown=0, NotChecked=0, Total=37056 [2021-12-06 17:50:49,486 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 811 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:49,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 1155 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:50:49,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-12-06 17:50:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 295. [2021-12-06 17:50:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.0136054421768708) internal successors, (298), 294 states have internal predecessors, (298), 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) [2021-12-06 17:50:49,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 298 transitions. [2021-12-06 17:50:49,517 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 298 transitions. Word has length 292 [2021-12-06 17:50:49,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:49,517 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 298 transitions. [2021-12-06 17:50:49,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 3.3424657534246576) internal successors, (488), 146 states have internal predecessors, (488), 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) [2021-12-06 17:50:49,518 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 298 transitions. [2021-12-06 17:50:49,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-12-06 17:50:49,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:49,519 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:49,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-06 17:50:49,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-06 17:50:49,720 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:49,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:49,721 INFO L85 PathProgramCache]: Analyzing trace with hash -817142336, now seen corresponding path program 56 times [2021-12-06 17:50:49,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:49,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395600445] [2021-12-06 17:50:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:49,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 4280 proven. 2394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:51,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:51,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395600445] [2021-12-06 17:50:51,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395600445] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:51,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123752811] [2021-12-06 17:50:51,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:50:51,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:51,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:51,300 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:51,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-06 17:50:51,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:50:51,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:51,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-06 17:50:51,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 2256 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:53,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 2256 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:53,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123752811] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:53,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:53,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 51, 51] total 147 [2021-12-06 17:50:53,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556807089] [2021-12-06 17:50:53,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:53,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2021-12-06 17:50:53,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:53,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-12-06 17:50:53,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3628, Invalid=17834, Unknown=0, NotChecked=0, Total=21462 [2021-12-06 17:50:53,375 INFO L87 Difference]: Start difference. First operand 295 states and 298 transitions. Second operand has 147 states, 147 states have (on average 3.9863945578231292) internal successors, (586), 147 states have internal predecessors, (586), 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) [2021-12-06 17:50:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:57,500 INFO L93 Difference]: Finished difference Result 691 states and 792 transitions. [2021-12-06 17:50:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-12-06 17:50:57,500 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 3.9863945578231292) internal successors, (586), 147 states have internal predecessors, (586), 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 294 [2021-12-06 17:50:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:57,502 INFO L225 Difference]: With dead ends: 691 [2021-12-06 17:50:57,502 INFO L226 Difference]: Without dead ends: 496 [2021-12-06 17:50:57,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 586 SyntacticMatches, 1 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39336 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=18126, Invalid=96456, Unknown=0, NotChecked=0, Total=114582 [2021-12-06 17:50:57,507 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 1325 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 3485 mSolverCounterSat, 1057 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1325 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 4542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1057 IncrementalHoareTripleChecker+Valid, 3485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:57,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1325 Valid, 759 Invalid, 4542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1057 Valid, 3485 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 17:50:57,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-06 17:50:57,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 301. [2021-12-06 17:50:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.0133333333333334) internal successors, (304), 300 states have internal predecessors, (304), 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) [2021-12-06 17:50:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 304 transitions. [2021-12-06 17:50:57,547 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 304 transitions. Word has length 294 [2021-12-06 17:50:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:57,547 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 304 transitions. [2021-12-06 17:50:57,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 3.9863945578231292) internal successors, (586), 147 states have internal predecessors, (586), 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) [2021-12-06 17:50:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 304 transitions. [2021-12-06 17:50:57,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-12-06 17:50:57,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:57,548 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:57,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-12-06 17:50:57,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-06 17:50:57,749 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:57,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:57,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1199032792, now seen corresponding path program 57 times [2021-12-06 17:50:57,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:57,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587114835] [2021-12-06 17:50:57,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:57,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6960 backedges. 4467 proven. 2493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:59,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:59,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587114835] [2021-12-06 17:50:59,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587114835] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:59,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994976040] [2021-12-06 17:50:59,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:50:59,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:59,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:59,481 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:59,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-06 17:50:59,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 49 check-sat command(s) [2021-12-06 17:50:59,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:59,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 17:50:59,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6960 backedges. 4608 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:02,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6960 backedges. 4608 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:02,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994976040] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:02,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:02,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 151 [2021-12-06 17:51:02,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963605040] [2021-12-06 17:51:02,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:02,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2021-12-06 17:51:02,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:02,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-12-06 17:51:02,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5103, Invalid=17547, Unknown=0, NotChecked=0, Total=22650 [2021-12-06 17:51:02,376 INFO L87 Difference]: Start difference. First operand 301 states and 304 transitions. Second operand has 151 states, 151 states have (on average 3.3112582781456954) internal successors, (500), 151 states have internal predecessors, (500), 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) [2021-12-06 17:51:04,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:04,040 INFO L93 Difference]: Finished difference Result 698 states and 800 transitions. [2021-12-06 17:51:04,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-06 17:51:04,041 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 3.3112582781456954) internal successors, (500), 151 states have internal predecessors, (500), 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 300 [2021-12-06 17:51:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:04,043 INFO L225 Difference]: With dead ends: 698 [2021-12-06 17:51:04,043 INFO L226 Difference]: Without dead ends: 499 [2021-12-06 17:51:04,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8758 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10005, Invalid=29795, Unknown=0, NotChecked=0, Total=39800 [2021-12-06 17:51:04,045 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 774 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:04,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 1204 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:51:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-12-06 17:51:04,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 303. [2021-12-06 17:51:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.0132450331125828) internal successors, (306), 302 states have internal predecessors, (306), 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) [2021-12-06 17:51:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 306 transitions. [2021-12-06 17:51:04,074 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 306 transitions. Word has length 300 [2021-12-06 17:51:04,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:04,074 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 306 transitions. [2021-12-06 17:51:04,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 3.3112582781456954) internal successors, (500), 151 states have internal predecessors, (500), 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) [2021-12-06 17:51:04,074 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 306 transitions. [2021-12-06 17:51:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-12-06 17:51:04,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:04,075 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:04,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-12-06 17:51:04,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:04,276 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:04,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1939396349, now seen corresponding path program 58 times [2021-12-06 17:51:04,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:04,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541237053] [2021-12-06 17:51:04,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:04,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 2352 proven. 4706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:04,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:04,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541237053] [2021-12-06 17:51:04,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541237053] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:04,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282731469] [2021-12-06 17:51:04,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:51:04,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:04,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:04,966 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:04,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-06 17:51:05,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:51:05,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:05,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-06 17:51:05,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 2450 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:05,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 2450 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:05,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282731469] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:05,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:05,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 56 [2021-12-06 17:51:05,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127731854] [2021-12-06 17:51:05,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:05,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 17:51:05,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:05,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 17:51:05,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 17:51:05,625 INFO L87 Difference]: Start difference. First operand 303 states and 306 transitions. Second operand has 56 states, 56 states have (on average 5.803571428571429) internal successors, (325), 56 states have internal predecessors, (325), 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) [2021-12-06 17:51:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:06,293 INFO L93 Difference]: Finished difference Result 320 states and 324 transitions. [2021-12-06 17:51:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-06 17:51:06,293 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.803571428571429) internal successors, (325), 56 states have internal predecessors, (325), 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 302 [2021-12-06 17:51:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:06,294 INFO L225 Difference]: With dead ends: 320 [2021-12-06 17:51:06,294 INFO L226 Difference]: Without dead ends: 318 [2021-12-06 17:51:06,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 648 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2937 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=4247, Invalid=7309, Unknown=0, NotChecked=0, Total=11556 [2021-12-06 17:51:06,295 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 222 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:06,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 502 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:51:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-12-06 17:51:06,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 311. [2021-12-06 17:51:06,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.0129032258064516) internal successors, (314), 310 states have internal predecessors, (314), 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) [2021-12-06 17:51:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 314 transitions. [2021-12-06 17:51:06,319 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 314 transitions. Word has length 302 [2021-12-06 17:51:06,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:06,320 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 314 transitions. [2021-12-06 17:51:06,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 5.803571428571429) internal successors, (325), 56 states have internal predecessors, (325), 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) [2021-12-06 17:51:06,320 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 314 transitions. [2021-12-06 17:51:06,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-06 17:51:06,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:06,321 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:06,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-12-06 17:51:06,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-12-06 17:51:06,522 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:06,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:06,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1043276829, now seen corresponding path program 59 times [2021-12-06 17:51:06,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:06,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749359005] [2021-12-06 17:51:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:06,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 4853 proven. 2597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:08,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:08,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749359005] [2021-12-06 17:51:08,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749359005] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:08,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891485447] [2021-12-06 17:51:08,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:51:08,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:08,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:08,233 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:08,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-06 17:51:08,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2021-12-06 17:51:08,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:08,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-06 17:51:08,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 5000 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:10,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 5000 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:11,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891485447] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:11,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:11,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103, 103] total 158 [2021-12-06 17:51:11,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277751537] [2021-12-06 17:51:11,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:11,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2021-12-06 17:51:11,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:11,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2021-12-06 17:51:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5620, Invalid=19186, Unknown=0, NotChecked=0, Total=24806 [2021-12-06 17:51:11,333 INFO L87 Difference]: Start difference. First operand 311 states and 314 transitions. Second operand has 158 states, 158 states have (on average 3.3354430379746836) internal successors, (527), 158 states have internal predecessors, (527), 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) [2021-12-06 17:51:14,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:14,221 INFO L93 Difference]: Finished difference Result 925 states and 1032 transitions. [2021-12-06 17:51:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-12-06 17:51:14,222 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 3.3354430379746836) internal successors, (527), 158 states have internal predecessors, (527), 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 310 [2021-12-06 17:51:14,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:14,224 INFO L225 Difference]: With dead ends: 925 [2021-12-06 17:51:14,224 INFO L226 Difference]: Without dead ends: 519 [2021-12-06 17:51:14,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16141 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=16176, Invalid=50646, Unknown=0, NotChecked=0, Total=66822 [2021-12-06 17:51:14,227 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 1015 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:14,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 1607 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 17:51:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-12-06 17:51:14,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 315. [2021-12-06 17:51:14,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.0127388535031847) internal successors, (318), 314 states have internal predecessors, (318), 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) [2021-12-06 17:51:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 318 transitions. [2021-12-06 17:51:14,252 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 318 transitions. Word has length 310 [2021-12-06 17:51:14,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:14,252 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 318 transitions. [2021-12-06 17:51:14,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 3.3354430379746836) internal successors, (527), 158 states have internal predecessors, (527), 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) [2021-12-06 17:51:14,252 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 318 transitions. [2021-12-06 17:51:14,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-12-06 17:51:14,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:14,254 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:14,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-06 17:51:14,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:14,455 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:14,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:14,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1035533421, now seen corresponding path program 60 times [2021-12-06 17:51:14,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:14,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111948404] [2021-12-06 17:51:14,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:14,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7652 backedges. 2550 proven. 5102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:15,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:15,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111948404] [2021-12-06 17:51:15,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111948404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:15,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811689133] [2021-12-06 17:51:15,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:51:15,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:15,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:15,208 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:15,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-06 17:51:15,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2021-12-06 17:51:15,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:15,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-06 17:51:15,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7652 backedges. 2652 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:15,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7652 backedges. 2652 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:16,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811689133] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:16,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:16,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 58 [2021-12-06 17:51:16,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213840721] [2021-12-06 17:51:16,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:16,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 17:51:16,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:16,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 17:51:16,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1494, Invalid=1812, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 17:51:16,056 INFO L87 Difference]: Start difference. First operand 315 states and 318 transitions. Second operand has 58 states, 58 states have (on average 5.810344827586207) internal successors, (337), 58 states have internal predecessors, (337), 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) [2021-12-06 17:51:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:16,718 INFO L93 Difference]: Finished difference Result 332 states and 336 transitions. [2021-12-06 17:51:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-12-06 17:51:16,718 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 5.810344827586207) internal successors, (337), 58 states have internal predecessors, (337), 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 314 [2021-12-06 17:51:16,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:16,719 INFO L225 Difference]: With dead ends: 332 [2021-12-06 17:51:16,719 INFO L226 Difference]: Without dead ends: 330 [2021-12-06 17:51:16,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 674 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=4572, Invalid=7860, Unknown=0, NotChecked=0, Total=12432 [2021-12-06 17:51:16,720 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 226 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:16,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 524 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:51:16,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-06 17:51:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 323. [2021-12-06 17:51:16,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.0124223602484472) internal successors, (326), 322 states have internal predecessors, (326), 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) [2021-12-06 17:51:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 326 transitions. [2021-12-06 17:51:16,746 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 326 transitions. Word has length 314 [2021-12-06 17:51:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:16,747 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 326 transitions. [2021-12-06 17:51:16,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 5.810344827586207) internal successors, (337), 58 states have internal predecessors, (337), 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) [2021-12-06 17:51:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 326 transitions. [2021-12-06 17:51:16,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-12-06 17:51:16,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:16,748 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:16,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-12-06 17:51:16,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-12-06 17:51:16,949 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:16,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:16,950 INFO L85 PathProgramCache]: Analyzing trace with hash 770478419, now seen corresponding path program 61 times [2021-12-06 17:51:16,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:16,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881704003] [2021-12-06 17:51:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:16,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8060 backedges. 5255 proven. 2805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:18,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:18,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881704003] [2021-12-06 17:51:18,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881704003] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:18,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291263352] [2021-12-06 17:51:18,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:51:18,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:18,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:18,760 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:18,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-06 17:51:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:18,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-06 17:51:18,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8060 backedges. 5406 proven. 2652 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:51:21,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8060 backedges. 5406 proven. 2652 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:51:21,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291263352] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:21,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:21,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 161 [2021-12-06 17:51:21,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111748393] [2021-12-06 17:51:21,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:21,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2021-12-06 17:51:21,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:21,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2021-12-06 17:51:21,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5781, Invalid=19979, Unknown=0, NotChecked=0, Total=25760 [2021-12-06 17:51:21,791 INFO L87 Difference]: Start difference. First operand 323 states and 326 transitions. Second operand has 161 states, 161 states have (on average 3.341614906832298) internal successors, (538), 161 states have internal predecessors, (538), 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) [2021-12-06 17:51:23,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:23,667 INFO L93 Difference]: Finished difference Result 746 states and 854 transitions. [2021-12-06 17:51:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-06 17:51:23,667 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 3.341614906832298) internal successors, (538), 161 states have internal predecessors, (538), 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 322 [2021-12-06 17:51:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:23,669 INFO L225 Difference]: With dead ends: 746 [2021-12-06 17:51:23,669 INFO L226 Difference]: Without dead ends: 533 [2021-12-06 17:51:23,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9997 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11295, Invalid=33861, Unknown=0, NotChecked=0, Total=45156 [2021-12-06 17:51:23,671 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 821 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:23,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 1220 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:51:23,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-12-06 17:51:23,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 325. [2021-12-06 17:51:23,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.0123456790123457) internal successors, (328), 324 states have internal predecessors, (328), 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) [2021-12-06 17:51:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 328 transitions. [2021-12-06 17:51:23,698 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 328 transitions. Word has length 322 [2021-12-06 17:51:23,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:23,698 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 328 transitions. [2021-12-06 17:51:23,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 3.341614906832298) internal successors, (538), 161 states have internal predecessors, (538), 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) [2021-12-06 17:51:23,698 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 328 transitions. [2021-12-06 17:51:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-06 17:51:23,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:23,699 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:23,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-12-06 17:51:23,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-12-06 17:51:23,900 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:23,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:23,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1497433272, now seen corresponding path program 62 times [2021-12-06 17:51:23,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:23,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802493631] [2021-12-06 17:51:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:23,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8164 backedges. 5255 proven. 2909 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:25,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:25,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802493631] [2021-12-06 17:51:25,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802493631] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:25,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799800938] [2021-12-06 17:51:25,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:51:25,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:25,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:25,835 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:25,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-06 17:51:25,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:51:25,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:25,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-06 17:51:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8164 backedges. 2756 proven. 5408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:27,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8164 backedges. 2756 proven. 5408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:28,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799800938] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:28,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:28,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 56, 56] total 162 [2021-12-06 17:51:28,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321888042] [2021-12-06 17:51:28,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:28,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2021-12-06 17:51:28,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:28,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2021-12-06 17:51:28,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4403, Invalid=21679, Unknown=0, NotChecked=0, Total=26082 [2021-12-06 17:51:28,108 INFO L87 Difference]: Start difference. First operand 325 states and 328 transitions. Second operand has 162 states, 162 states have (on average 3.9876543209876543) internal successors, (646), 162 states have internal predecessors, (646), 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) [2021-12-06 17:51:32,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:32,873 INFO L93 Difference]: Finished difference Result 761 states and 872 transitions. [2021-12-06 17:51:32,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2021-12-06 17:51:32,873 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 3.9876543209876543) internal successors, (646), 162 states have internal predecessors, (646), 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 324 [2021-12-06 17:51:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:32,875 INFO L225 Difference]: With dead ends: 761 [2021-12-06 17:51:32,875 INFO L226 Difference]: Without dead ends: 546 [2021-12-06 17:51:32,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1019 GetRequests, 646 SyntacticMatches, 1 SemanticMatches, 372 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48071 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=22001, Invalid=117501, Unknown=0, NotChecked=0, Total=139502 [2021-12-06 17:51:32,881 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1552 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 3267 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 4473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 3267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:32,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1552 Valid, 809 Invalid, 4473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1206 Valid, 3267 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 17:51:32,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-12-06 17:51:32,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 331. [2021-12-06 17:51:32,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.0121212121212122) internal successors, (334), 330 states have internal predecessors, (334), 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) [2021-12-06 17:51:32,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 334 transitions. [2021-12-06 17:51:32,918 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 334 transitions. Word has length 324 [2021-12-06 17:51:32,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:32,918 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 334 transitions. [2021-12-06 17:51:32,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 3.9876543209876543) internal successors, (646), 162 states have internal predecessors, (646), 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) [2021-12-06 17:51:32,918 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 334 transitions. [2021-12-06 17:51:32,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-12-06 17:51:32,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:32,919 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:32,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-12-06 17:51:33,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:33,121 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:33,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1006588400, now seen corresponding path program 63 times [2021-12-06 17:51:33,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:33,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257425900] [2021-12-06 17:51:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:33,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 5462 proven. 3018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:35,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:35,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257425900] [2021-12-06 17:51:35,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257425900] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:35,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370592773] [2021-12-06 17:51:35,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:51:35,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:35,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:35,162 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:35,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-06 17:51:35,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2021-12-06 17:51:35,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:35,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-06 17:51:35,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 5618 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:38,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 5618 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:38,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370592773] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:38,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:38,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110, 110] total 166 [2021-12-06 17:51:38,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206144536] [2021-12-06 17:51:38,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:38,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2021-12-06 17:51:38,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:38,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2021-12-06 17:51:38,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6163, Invalid=21227, Unknown=0, NotChecked=0, Total=27390 [2021-12-06 17:51:38,537 INFO L87 Difference]: Start difference. First operand 331 states and 334 transitions. Second operand has 166 states, 166 states have (on average 3.3132530120481927) internal successors, (550), 166 states have internal predecessors, (550), 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) [2021-12-06 17:51:40,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:40,672 INFO L93 Difference]: Finished difference Result 768 states and 880 transitions. [2021-12-06 17:51:40,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-12-06 17:51:40,672 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 3.3132530120481927) internal successors, (550), 166 states have internal predecessors, (550), 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 330 [2021-12-06 17:51:40,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:40,674 INFO L225 Difference]: With dead ends: 768 [2021-12-06 17:51:40,674 INFO L226 Difference]: Without dead ends: 549 [2021-12-06 17:51:40,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10598 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12105, Invalid=36075, Unknown=0, NotChecked=0, Total=48180 [2021-12-06 17:51:40,676 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 1128 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:40,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1128 Valid, 1238 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [741 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:51:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-12-06 17:51:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 333. [2021-12-06 17:51:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.0120481927710843) internal successors, (336), 332 states have internal predecessors, (336), 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) [2021-12-06 17:51:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 336 transitions. [2021-12-06 17:51:40,705 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 336 transitions. Word has length 330 [2021-12-06 17:51:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:40,705 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 336 transitions. [2021-12-06 17:51:40,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 3.3132530120481927) internal successors, (550), 166 states have internal predecessors, (550), 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) [2021-12-06 17:51:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 336 transitions. [2021-12-06 17:51:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-12-06 17:51:40,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:40,707 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 54, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:40,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-06 17:51:40,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-06 17:51:40,908 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:40,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1741558667, now seen corresponding path program 64 times [2021-12-06 17:51:40,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:40,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682754960] [2021-12-06 17:51:40,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:40,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8588 backedges. 2862 proven. 5726 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:41,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:41,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682754960] [2021-12-06 17:51:41,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682754960] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:41,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954205122] [2021-12-06 17:51:41,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:51:41,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:41,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:41,734 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:41,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-06 17:51:41,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:51:41,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:41,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 1225 conjuncts, 111 conjunts are in the unsatisfiable core [2021-12-06 17:51:41,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8588 backedges. 2970 proven. 5618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:42,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:42,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8588 backedges. 2970 proven. 5618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:42,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954205122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:42,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:42,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 61 [2021-12-06 17:51:42,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067478050] [2021-12-06 17:51:42,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:42,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-06 17:51:42,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:42,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-06 17:51:42,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1662, Invalid=1998, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 17:51:42,483 INFO L87 Difference]: Start difference. First operand 333 states and 336 transitions. Second operand has 61 states, 61 states have (on average 5.819672131147541) internal successors, (355), 61 states have internal predecessors, (355), 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) [2021-12-06 17:51:43,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:43,200 INFO L93 Difference]: Finished difference Result 350 states and 354 transitions. [2021-12-06 17:51:43,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-12-06 17:51:43,200 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 5.819672131147541) internal successors, (355), 61 states have internal predecessors, (355), 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 332 [2021-12-06 17:51:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:43,202 INFO L225 Difference]: With dead ends: 350 [2021-12-06 17:51:43,202 INFO L226 Difference]: Without dead ends: 348 [2021-12-06 17:51:43,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 830 GetRequests, 713 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3507 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5082, Invalid=8724, Unknown=0, NotChecked=0, Total=13806 [2021-12-06 17:51:43,203 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 238 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:43,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 577 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:51:43,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-12-06 17:51:43,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 341. [2021-12-06 17:51:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.011764705882353) internal successors, (344), 340 states have internal predecessors, (344), 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) [2021-12-06 17:51:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 344 transitions. [2021-12-06 17:51:43,232 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 344 transitions. Word has length 332 [2021-12-06 17:51:43,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:43,232 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 344 transitions. [2021-12-06 17:51:43,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 5.819672131147541) internal successors, (355), 61 states have internal predecessors, (355), 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) [2021-12-06 17:51:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 344 transitions. [2021-12-06 17:51:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-06 17:51:43,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:43,233 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 55, 55, 55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:43,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-06 17:51:43,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-06 17:51:43,435 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:43,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:43,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1519974747, now seen corresponding path program 65 times [2021-12-06 17:51:43,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:43,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034089187] [2021-12-06 17:51:43,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:43,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9020 backedges. 5888 proven. 3132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:45,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:45,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034089187] [2021-12-06 17:51:45,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034089187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:45,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249626920] [2021-12-06 17:51:45,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:51:45,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:45,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:45,682 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:45,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-06 17:51:45,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2021-12-06 17:51:45,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-06 17:51:45,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9020 backedges. 6050 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:48,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9020 backedges. 6050 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:49,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249626920] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:49,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:49,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113, 113] total 173 [2021-12-06 17:51:49,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104889639] [2021-12-06 17:51:49,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:49,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2021-12-06 17:51:49,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:49,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2021-12-06 17:51:49,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6730, Invalid=23026, Unknown=0, NotChecked=0, Total=29756 [2021-12-06 17:51:49,291 INFO L87 Difference]: Start difference. First operand 341 states and 344 transitions. Second operand has 173 states, 173 states have (on average 3.3352601156069364) internal successors, (577), 173 states have internal predecessors, (577), 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) [2021-12-06 17:51:52,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:52,936 INFO L93 Difference]: Finished difference Result 1015 states and 1132 transitions. [2021-12-06 17:51:52,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-12-06 17:51:52,936 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 3.3352601156069364) internal successors, (577), 173 states have internal predecessors, (577), 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 340 [2021-12-06 17:51:52,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:52,938 INFO L225 Difference]: With dead ends: 1015 [2021-12-06 17:51:52,938 INFO L226 Difference]: Without dead ends: 569 [2021-12-06 17:51:52,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 620 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19406 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=19441, Invalid=60931, Unknown=0, NotChecked=0, Total=80372 [2021-12-06 17:51:52,942 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1053 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:52,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 1581 Invalid, 2381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 17:51:52,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-12-06 17:51:52,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 345. [2021-12-06 17:51:52,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.0116279069767442) internal successors, (348), 344 states have internal predecessors, (348), 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) [2021-12-06 17:51:52,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 348 transitions. [2021-12-06 17:51:52,972 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 348 transitions. Word has length 340 [2021-12-06 17:51:52,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:52,972 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 348 transitions. [2021-12-06 17:51:52,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 3.3352601156069364) internal successors, (577), 173 states have internal predecessors, (577), 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) [2021-12-06 17:51:52,972 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 348 transitions. [2021-12-06 17:51:52,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-06 17:51:52,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:52,973 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 56, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:52,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-12-06 17:51:53,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:53,175 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:53,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:53,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1862601829, now seen corresponding path program 66 times [2021-12-06 17:51:53,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:53,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011484193] [2021-12-06 17:51:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:53,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 3080 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:54,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:54,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011484193] [2021-12-06 17:51:54,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011484193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:54,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405943959] [2021-12-06 17:51:54,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:51:54,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:54,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:54,130 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:54,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-06 17:51:54,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2021-12-06 17:51:54,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:54,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-06 17:51:54,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 3192 proven. 6050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:54,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 3192 proven. 6050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:55,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405943959] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:55,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:55,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 63 [2021-12-06 17:51:55,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633887751] [2021-12-06 17:51:55,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:55,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 17:51:55,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:55,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 17:51:55,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1779, Invalid=2127, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 17:51:55,083 INFO L87 Difference]: Start difference. First operand 345 states and 348 transitions. Second operand has 63 states, 63 states have (on average 5.825396825396825) internal successors, (367), 63 states have internal predecessors, (367), 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) [2021-12-06 17:51:55,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:55,840 INFO L93 Difference]: Finished difference Result 362 states and 366 transitions. [2021-12-06 17:51:55,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-12-06 17:51:55,840 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 5.825396825396825) internal successors, (367), 63 states have internal predecessors, (367), 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 344 [2021-12-06 17:51:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:55,842 INFO L225 Difference]: With dead ends: 362 [2021-12-06 17:51:55,842 INFO L226 Difference]: Without dead ends: 360 [2021-12-06 17:51:55,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 739 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5437, Invalid=9325, Unknown=0, NotChecked=0, Total=14762 [2021-12-06 17:51:55,843 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 424 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:55,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 460 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:51:55,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-06 17:51:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 353. [2021-12-06 17:51:55,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.0113636363636365) internal successors, (356), 352 states have internal predecessors, (356), 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) [2021-12-06 17:51:55,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 356 transitions. [2021-12-06 17:51:55,873 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 356 transitions. Word has length 344 [2021-12-06 17:51:55,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:55,873 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 356 transitions. [2021-12-06 17:51:55,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 5.825396825396825) internal successors, (367), 63 states have internal predecessors, (367), 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) [2021-12-06 17:51:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 356 transitions. [2021-12-06 17:51:55,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-12-06 17:51:55,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:55,874 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 57, 57, 57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:55,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-12-06 17:51:56,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:56,075 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:56,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:56,075 INFO L85 PathProgramCache]: Analyzing trace with hash -133879477, now seen corresponding path program 67 times [2021-12-06 17:51:56,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:56,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137731529] [2021-12-06 17:51:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:56,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9690 backedges. 6330 proven. 3360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:58,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:58,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137731529] [2021-12-06 17:51:58,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137731529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:58,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368200012] [2021-12-06 17:51:58,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:51:58,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:58,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:58,211 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:58,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-06 17:51:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:58,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-06 17:51:58,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9690 backedges. 6496 proven. 3192 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:52:01,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9690 backedges. 6496 proven. 3192 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:52:02,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368200012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:02,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:52:02,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 116, 116] total 176 [2021-12-06 17:52:02,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038459876] [2021-12-06 17:52:02,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:02,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2021-12-06 17:52:02,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:02,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2021-12-06 17:52:02,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6906, Invalid=23894, Unknown=0, NotChecked=0, Total=30800 [2021-12-06 17:52:02,052 INFO L87 Difference]: Start difference. First operand 353 states and 356 transitions. Second operand has 176 states, 176 states have (on average 3.340909090909091) internal successors, (588), 176 states have internal predecessors, (588), 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) [2021-12-06 17:52:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:04,669 INFO L93 Difference]: Finished difference Result 816 states and 934 transitions. [2021-12-06 17:52:04,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-12-06 17:52:04,669 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 3.340909090909091) internal successors, (588), 176 states have internal predecessors, (588), 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 352 [2021-12-06 17:52:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:04,671 INFO L225 Difference]: With dead ends: 816 [2021-12-06 17:52:04,671 INFO L226 Difference]: Without dead ends: 583 [2021-12-06 17:52:04,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11957 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=13520, Invalid=40536, Unknown=0, NotChecked=0, Total=54056 [2021-12-06 17:52:04,674 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 881 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:04,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 1411 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 17:52:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-12-06 17:52:04,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 355. [2021-12-06 17:52:04,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.0112994350282485) internal successors, (358), 354 states have internal predecessors, (358), 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) [2021-12-06 17:52:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 358 transitions. [2021-12-06 17:52:04,711 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 358 transitions. Word has length 352 [2021-12-06 17:52:04,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:04,711 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 358 transitions. [2021-12-06 17:52:04,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 3.340909090909091) internal successors, (588), 176 states have internal predecessors, (588), 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) [2021-12-06 17:52:04,711 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 358 transitions. [2021-12-06 17:52:04,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-12-06 17:52:04,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:04,713 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:04,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-12-06 17:52:04,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-06 17:52:04,914 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:04,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:04,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1780833776, now seen corresponding path program 68 times [2021-12-06 17:52:04,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:04,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222977608] [2021-12-06 17:52:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:04,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9804 backedges. 6330 proven. 3474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:07,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:07,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222977608] [2021-12-06 17:52:07,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222977608] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:07,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358489147] [2021-12-06 17:52:07,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:52:07,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:07,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:52:07,259 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:52:07,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-06 17:52:07,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:52:07,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:52:07,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-06 17:52:07,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9804 backedges. 6498 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:10,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9804 backedges. 6498 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:10,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358489147] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:10,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:52:10,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118, 118] total 178 [2021-12-06 17:52:10,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533668821] [2021-12-06 17:52:10,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:10,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2021-12-06 17:52:10,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:10,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2021-12-06 17:52:10,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7083, Invalid=24423, Unknown=0, NotChecked=0, Total=31506 [2021-12-06 17:52:10,666 INFO L87 Difference]: Start difference. First operand 355 states and 358 transitions. Second operand has 178 states, 178 states have (on average 3.3146067415730336) internal successors, (590), 178 states have internal predecessors, (590), 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) [2021-12-06 17:52:13,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:13,028 INFO L93 Difference]: Finished difference Result 824 states and 944 transitions. [2021-12-06 17:52:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-12-06 17:52:13,029 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 3.3146067415730336) internal successors, (590), 178 states have internal predecessors, (590), 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 354 [2021-12-06 17:52:13,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:13,031 INFO L225 Difference]: With dead ends: 824 [2021-12-06 17:52:13,031 INFO L226 Difference]: Without dead ends: 589 [2021-12-06 17:52:13,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12196 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13929, Invalid=41531, Unknown=0, NotChecked=0, Total=55460 [2021-12-06 17:52:13,033 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 843 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:13,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 1601 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 1763 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:52:13,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-12-06 17:52:13,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 357. [2021-12-06 17:52:13,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.0112359550561798) internal successors, (360), 356 states have internal predecessors, (360), 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) [2021-12-06 17:52:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 360 transitions. [2021-12-06 17:52:13,065 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 360 transitions. Word has length 354 [2021-12-06 17:52:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:13,065 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 360 transitions. [2021-12-06 17:52:13,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 178 states have (on average 3.3146067415730336) internal successors, (590), 178 states have internal predecessors, (590), 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) [2021-12-06 17:52:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 360 transitions. [2021-12-06 17:52:13,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-12-06 17:52:13,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:13,067 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 58, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:13,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-12-06 17:52:13,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:13,268 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:13,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:13,269 INFO L85 PathProgramCache]: Analyzing trace with hash -720700075, now seen corresponding path program 69 times [2021-12-06 17:52:13,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:13,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261324664] [2021-12-06 17:52:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:13,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 3306 proven. 6614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:14,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:14,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261324664] [2021-12-06 17:52:14,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261324664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:14,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310406859] [2021-12-06 17:52:14,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:52:14,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:14,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:52:14,231 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:52:14,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-06 17:52:14,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2021-12-06 17:52:14,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:52:14,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-06 17:52:14,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 3422 proven. 6498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:14,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 3422 proven. 6498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:15,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310406859] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:15,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:52:15,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 65 [2021-12-06 17:52:15,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326241954] [2021-12-06 17:52:15,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:15,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 17:52:15,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:15,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 17:52:15,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1900, Invalid=2260, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 17:52:15,155 INFO L87 Difference]: Start difference. First operand 357 states and 360 transitions. Second operand has 65 states, 65 states have (on average 5.8307692307692305) internal successors, (379), 65 states have internal predecessors, (379), 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) [2021-12-06 17:52:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:15,987 INFO L93 Difference]: Finished difference Result 374 states and 378 transitions. [2021-12-06 17:52:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-12-06 17:52:15,987 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.8307692307692305) internal successors, (379), 65 states have internal predecessors, (379), 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 356 [2021-12-06 17:52:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:15,989 INFO L225 Difference]: With dead ends: 374 [2021-12-06 17:52:15,989 INFO L226 Difference]: Without dead ends: 372 [2021-12-06 17:52:15,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 765 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3999 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5804, Invalid=9946, Unknown=0, NotChecked=0, Total=15750 [2021-12-06 17:52:15,991 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 314 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:15,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 607 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:52:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-12-06 17:52:16,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 365. [2021-12-06 17:52:16,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.010989010989011) internal successors, (368), 364 states have internal predecessors, (368), 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) [2021-12-06 17:52:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 368 transitions. [2021-12-06 17:52:16,032 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 368 transitions. Word has length 356 [2021-12-06 17:52:16,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:16,032 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 368 transitions. [2021-12-06 17:52:16,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.8307692307692305) internal successors, (379), 65 states have internal predecessors, (379), 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) [2021-12-06 17:52:16,033 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 368 transitions. [2021-12-06 17:52:16,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-12-06 17:52:16,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:16,034 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 59, 59, 59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:16,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-12-06 17:52:16,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:16,235 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:16,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1320998341, now seen corresponding path program 70 times [2021-12-06 17:52:16,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:16,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775401224] [2021-12-06 17:52:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:16,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10384 backedges. 6788 proven. 3596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:18,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:18,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775401224] [2021-12-06 17:52:18,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775401224] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:18,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388384887] [2021-12-06 17:52:18,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:52:18,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:18,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:52:18,525 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:52:18,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-06 17:52:18,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:52:18,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:52:18,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1337 conjuncts, 121 conjunts are in the unsatisfiable core [2021-12-06 17:52:18,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10384 backedges. 6962 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:21,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10384 backedges. 6962 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:22,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388384887] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:22,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:52:22,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121, 121] total 185 [2021-12-06 17:52:22,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69413942] [2021-12-06 17:52:22,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:22,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2021-12-06 17:52:22,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:22,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2021-12-06 17:52:22,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7690, Invalid=26350, Unknown=0, NotChecked=0, Total=34040 [2021-12-06 17:52:22,241 INFO L87 Difference]: Start difference. First operand 365 states and 368 transitions. Second operand has 185 states, 185 states have (on average 3.3351351351351353) internal successors, (617), 185 states have internal predecessors, (617), 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) [2021-12-06 17:52:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:26,399 INFO L93 Difference]: Finished difference Result 1087 states and 1212 transitions. [2021-12-06 17:52:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2021-12-06 17:52:26,399 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 3.3351351351351353) internal successors, (617), 185 states have internal predecessors, (617), 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 364 [2021-12-06 17:52:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:26,401 INFO L225 Difference]: With dead ends: 1087 [2021-12-06 17:52:26,401 INFO L226 Difference]: Without dead ends: 609 [2021-12-06 17:52:26,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22234 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=22269, Invalid=69843, Unknown=0, NotChecked=0, Total=92112 [2021-12-06 17:52:26,405 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 1136 mSDsluCounter, 1739 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 2599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:26,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1136 Valid, 1862 Invalid, 2599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:52:26,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-12-06 17:52:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 369. [2021-12-06 17:52:26,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.0108695652173914) internal successors, (372), 368 states have internal predecessors, (372), 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) [2021-12-06 17:52:26,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 372 transitions. [2021-12-06 17:52:26,440 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 372 transitions. Word has length 364 [2021-12-06 17:52:26,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:26,440 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 372 transitions. [2021-12-06 17:52:26,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 3.3351351351351353) internal successors, (617), 185 states have internal predecessors, (617), 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) [2021-12-06 17:52:26,440 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 372 transitions. [2021-12-06 17:52:26,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-12-06 17:52:26,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:26,441 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 60, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:26,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-12-06 17:52:26,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:26,642 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:26,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:26,643 INFO L85 PathProgramCache]: Analyzing trace with hash 21577541, now seen corresponding path program 71 times [2021-12-06 17:52:26,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:26,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112209817] [2021-12-06 17:52:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:26,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10622 backedges. 3540 proven. 7082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:27,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:27,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112209817] [2021-12-06 17:52:27,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112209817] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384327035] [2021-12-06 17:52:27,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:52:27,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:52:27,633 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:52:27,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-06 17:52:27,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2021-12-06 17:52:27,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:52:27,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 1357 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-06 17:52:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10622 backedges. 3660 proven. 6962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:28,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10622 backedges. 3660 proven. 6962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:28,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384327035] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:28,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:52:28,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 67 [2021-12-06 17:52:28,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430314991] [2021-12-06 17:52:28,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:28,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-06 17:52:28,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:28,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-06 17:52:28,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2025, Invalid=2397, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 17:52:28,717 INFO L87 Difference]: Start difference. First operand 369 states and 372 transitions. Second operand has 67 states, 67 states have (on average 5.835820895522388) internal successors, (391), 67 states have internal predecessors, (391), 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) [2021-12-06 17:52:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:29,538 INFO L93 Difference]: Finished difference Result 386 states and 390 transitions. [2021-12-06 17:52:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-12-06 17:52:29,538 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 5.835820895522388) internal successors, (391), 67 states have internal predecessors, (391), 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 368 [2021-12-06 17:52:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:29,540 INFO L225 Difference]: With dead ends: 386 [2021-12-06 17:52:29,540 INFO L226 Difference]: Without dead ends: 384 [2021-12-06 17:52:29,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 791 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=6183, Invalid=10587, Unknown=0, NotChecked=0, Total=16770 [2021-12-06 17:52:29,541 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 444 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:29,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 522 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:52:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-12-06 17:52:29,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 377. [2021-12-06 17:52:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.0106382978723405) internal successors, (380), 376 states have internal predecessors, (380), 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) [2021-12-06 17:52:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 380 transitions. [2021-12-06 17:52:29,575 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 380 transitions. Word has length 368 [2021-12-06 17:52:29,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:29,575 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 380 transitions. [2021-12-06 17:52:29,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 5.835820895522388) internal successors, (391), 67 states have internal predecessors, (391), 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) [2021-12-06 17:52:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 380 transitions. [2021-12-06 17:52:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2021-12-06 17:52:29,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:29,577 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 61, 61, 61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:29,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-12-06 17:52:29,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:29,778 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:29,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:29,779 INFO L85 PathProgramCache]: Analyzing trace with hash 534281259, now seen corresponding path program 72 times [2021-12-06 17:52:29,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:29,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583165967] [2021-12-06 17:52:29,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:29,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11102 backedges. 7262 proven. 3840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:32,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:32,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583165967] [2021-12-06 17:52:32,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583165967] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:32,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641376361] [2021-12-06 17:52:32,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:52:32,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:32,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:52:32,199 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:52:32,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-06 17:52:32,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2021-12-06 17:52:32,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:52:32,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 125 conjunts are in the unsatisfiable core [2021-12-06 17:52:32,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11102 backedges. 7442 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:35,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11102 backedges. 7442 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:36,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641376361] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:36,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:52:36,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125, 125] total 191 [2021-12-06 17:52:36,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566618881] [2021-12-06 17:52:36,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:36,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2021-12-06 17:52:36,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:36,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2021-12-06 17:52:36,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8194, Invalid=28096, Unknown=0, NotChecked=0, Total=36290 [2021-12-06 17:52:36,418 INFO L87 Difference]: Start difference. First operand 377 states and 380 transitions. Second operand has 191 states, 191 states have (on average 3.3350785340314135) internal successors, (637), 191 states have internal predecessors, (637), 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) [2021-12-06 17:52:40,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:40,816 INFO L93 Difference]: Finished difference Result 1123 states and 1252 transitions. [2021-12-06 17:52:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2021-12-06 17:52:40,816 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 3.3350785340314135) internal successors, (637), 191 states have internal predecessors, (637), 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 376 [2021-12-06 17:52:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:40,818 INFO L225 Difference]: With dead ends: 1123 [2021-12-06 17:52:40,818 INFO L226 Difference]: Without dead ends: 629 [2021-12-06 17:52:40,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 998 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23720 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=23755, Invalid=74527, Unknown=0, NotChecked=0, Total=98282 [2021-12-06 17:52:40,823 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 1357 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 2768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:40,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 1955 Invalid, 2768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:52:40,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-12-06 17:52:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 381. [2021-12-06 17:52:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.0105263157894737) internal successors, (384), 380 states have internal predecessors, (384), 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) [2021-12-06 17:52:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 384 transitions. [2021-12-06 17:52:40,858 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 384 transitions. Word has length 376 [2021-12-06 17:52:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:40,858 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 384 transitions. [2021-12-06 17:52:40,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 3.3350785340314135) internal successors, (637), 191 states have internal predecessors, (637), 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) [2021-12-06 17:52:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 384 transitions. [2021-12-06 17:52:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-12-06 17:52:40,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:40,860 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 62, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:40,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-12-06 17:52:41,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:41,061 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:41,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1484434891, now seen corresponding path program 73 times [2021-12-06 17:52:41,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:41,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507933282] [2021-12-06 17:52:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:41,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11348 backedges. 3782 proven. 7566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:42,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:42,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507933282] [2021-12-06 17:52:42,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507933282] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:42,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723192268] [2021-12-06 17:52:42,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:52:42,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:42,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:52:42,096 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:52:42,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-06 17:52:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:42,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-06 17:52:42,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11348 backedges. 3906 proven. 7442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:42,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11348 backedges. 3906 proven. 7442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:42,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723192268] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:42,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:52:42,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 69 [2021-12-06 17:52:42,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64335778] [2021-12-06 17:52:42,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:42,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-06 17:52:42,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:42,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-06 17:52:42,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2154, Invalid=2538, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 17:52:42,900 INFO L87 Difference]: Start difference. First operand 381 states and 384 transitions. Second operand has 69 states, 69 states have (on average 5.840579710144928) internal successors, (403), 69 states have internal predecessors, (403), 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) [2021-12-06 17:52:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:43,765 INFO L93 Difference]: Finished difference Result 398 states and 402 transitions. [2021-12-06 17:52:43,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-12-06 17:52:43,765 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 5.840579710144928) internal successors, (403), 69 states have internal predecessors, (403), 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 380 [2021-12-06 17:52:43,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:43,767 INFO L225 Difference]: With dead ends: 398 [2021-12-06 17:52:43,767 INFO L226 Difference]: Without dead ends: 396 [2021-12-06 17:52:43,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 950 GetRequests, 817 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4523 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=6574, Invalid=11248, Unknown=0, NotChecked=0, Total=17822 [2021-12-06 17:52:43,768 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 270 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:43,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 650 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:52:43,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-06 17:52:43,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 389. [2021-12-06 17:52:43,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0103092783505154) internal successors, (392), 388 states have internal predecessors, (392), 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) [2021-12-06 17:52:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 392 transitions. [2021-12-06 17:52:43,812 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 392 transitions. Word has length 380 [2021-12-06 17:52:43,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:43,812 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 392 transitions. [2021-12-06 17:52:43,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 5.840579710144928) internal successors, (403), 69 states have internal predecessors, (403), 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) [2021-12-06 17:52:43,813 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 392 transitions. [2021-12-06 17:52:43,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2021-12-06 17:52:43,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:43,814 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 63, 63, 63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:43,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-12-06 17:52:44,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-12-06 17:52:44,015 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:44,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:44,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1710579941, now seen corresponding path program 74 times [2021-12-06 17:52:44,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:44,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882462539] [2021-12-06 17:52:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:44,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11844 backedges. 7752 proven. 4092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:46,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:46,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882462539] [2021-12-06 17:52:46,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882462539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:46,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795129618] [2021-12-06 17:52:46,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:52:46,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:46,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:52:46,657 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:52:46,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-06 17:52:46,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:52:46,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:52:46,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 1425 conjuncts, 128 conjunts are in the unsatisfiable core [2021-12-06 17:52:46,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11844 backedges. 7936 proven. 3906 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:52:50,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11844 backedges. 7936 proven. 3906 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:52:50,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795129618] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:50,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:52:50,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 128, 128] total 194 [2021-12-06 17:52:50,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832715875] [2021-12-06 17:52:50,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:50,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2021-12-06 17:52:50,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:50,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2021-12-06 17:52:50,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8388, Invalid=29054, Unknown=0, NotChecked=0, Total=37442 [2021-12-06 17:52:50,643 INFO L87 Difference]: Start difference. First operand 389 states and 392 transitions. Second operand has 194 states, 194 states have (on average 3.3402061855670104) internal successors, (648), 194 states have internal predecessors, (648), 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) [2021-12-06 17:52:53,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:53,525 INFO L93 Difference]: Finished difference Result 900 states and 1030 transitions. [2021-12-06 17:52:53,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-12-06 17:52:53,525 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 3.3402061855670104) internal successors, (648), 194 states have internal predecessors, (648), 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 388 [2021-12-06 17:52:53,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:53,527 INFO L225 Difference]: With dead ends: 900 [2021-12-06 17:52:53,527 INFO L226 Difference]: Without dead ends: 643 [2021-12-06 17:52:53,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14540 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=16454, Invalid=49338, Unknown=0, NotChecked=0, Total=65792 [2021-12-06 17:52:53,530 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 1082 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:53,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1082 Valid, 1559 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 17:52:53,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-12-06 17:52:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 391. [2021-12-06 17:52:53,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.0102564102564102) internal successors, (394), 390 states have internal predecessors, (394), 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) [2021-12-06 17:52:53,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 394 transitions. [2021-12-06 17:52:53,568 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 394 transitions. Word has length 388 [2021-12-06 17:52:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:53,568 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 394 transitions. [2021-12-06 17:52:53,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 3.3402061855670104) internal successors, (648), 194 states have internal predecessors, (648), 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) [2021-12-06 17:52:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 394 transitions. [2021-12-06 17:52:53,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-12-06 17:52:53,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:53,570 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:53,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-12-06 17:52:53,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:53,771 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:53,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1045177664, now seen corresponding path program 75 times [2021-12-06 17:52:53,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:53,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151910930] [2021-12-06 17:52:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:53,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11970 backedges. 7752 proven. 4218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:56,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:56,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151910930] [2021-12-06 17:52:56,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151910930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:56,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033384387] [2021-12-06 17:52:56,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:52:56,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:56,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:52:56,473 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:52:56,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-06 17:52:56,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-12-06 17:52:56,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:52:56,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 130 conjunts are in the unsatisfiable core [2021-12-06 17:52:56,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11970 backedges. 7938 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:00,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11970 backedges. 7938 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:00,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033384387] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:00,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:00,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130, 130] total 196 [2021-12-06 17:53:00,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143231612] [2021-12-06 17:53:00,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:00,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2021-12-06 17:53:00,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:00,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2021-12-06 17:53:00,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8583, Invalid=29637, Unknown=0, NotChecked=0, Total=38220 [2021-12-06 17:53:00,705 INFO L87 Difference]: Start difference. First operand 391 states and 394 transitions. Second operand has 196 states, 196 states have (on average 3.316326530612245) internal successors, (650), 196 states have internal predecessors, (650), 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) [2021-12-06 17:53:04,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:04,003 INFO L93 Difference]: Finished difference Result 908 states and 1040 transitions. [2021-12-06 17:53:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-12-06 17:53:04,003 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 3.316326530612245) internal successors, (650), 196 states have internal predecessors, (650), 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 390 [2021-12-06 17:53:04,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:04,005 INFO L225 Difference]: With dead ends: 908 [2021-12-06 17:53:04,005 INFO L226 Difference]: Without dead ends: 649 [2021-12-06 17:53:04,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 972 GetRequests, 714 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14803 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=16905, Invalid=50435, Unknown=0, NotChecked=0, Total=67340 [2021-12-06 17:53:04,008 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 1343 mSDsluCounter, 1777 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 746 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:04,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1343 Valid, 1910 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [746 Valid, 2092 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:53:04,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-12-06 17:53:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 393. [2021-12-06 17:53:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.010204081632653) internal successors, (396), 392 states have internal predecessors, (396), 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) [2021-12-06 17:53:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 396 transitions. [2021-12-06 17:53:04,046 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 396 transitions. Word has length 390 [2021-12-06 17:53:04,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:04,046 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 396 transitions. [2021-12-06 17:53:04,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 3.316326530612245) internal successors, (650), 196 states have internal predecessors, (650), 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) [2021-12-06 17:53:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 396 transitions. [2021-12-06 17:53:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-12-06 17:53:04,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:04,048 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 64, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:04,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-12-06 17:53:04,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:04,249 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:04,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash -666585563, now seen corresponding path program 76 times [2021-12-06 17:53:04,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:04,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41922129] [2021-12-06 17:53:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:04,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12098 backedges. 4032 proven. 8066 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:05,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:05,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41922129] [2021-12-06 17:53:05,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41922129] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:05,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21236654] [2021-12-06 17:53:05,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:53:05,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:05,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:05,440 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:05,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-06 17:53:05,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:53:05,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:05,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 1445 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-06 17:53:05,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12098 backedges. 4160 proven. 7938 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:05,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12098 backedges. 4160 proven. 7938 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:06,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21236654] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:06,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:06,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 71 [2021-12-06 17:53:06,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634734789] [2021-12-06 17:53:06,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:06,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 17:53:06,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:06,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 17:53:06,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2287, Invalid=2683, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 17:53:06,265 INFO L87 Difference]: Start difference. First operand 393 states and 396 transitions. Second operand has 71 states, 71 states have (on average 5.845070422535211) internal successors, (415), 71 states have internal predecessors, (415), 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) [2021-12-06 17:53:07,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:07,183 INFO L93 Difference]: Finished difference Result 410 states and 414 transitions. [2021-12-06 17:53:07,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-12-06 17:53:07,184 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 5.845070422535211) internal successors, (415), 71 states have internal predecessors, (415), 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 392 [2021-12-06 17:53:07,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:07,185 INFO L225 Difference]: With dead ends: 410 [2021-12-06 17:53:07,185 INFO L226 Difference]: Without dead ends: 408 [2021-12-06 17:53:07,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 843 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4797 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=6977, Invalid=11929, Unknown=0, NotChecked=0, Total=18906 [2021-12-06 17:53:07,186 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 406 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:07,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 566 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:53:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-06 17:53:07,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 401. [2021-12-06 17:53:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.01) internal successors, (404), 400 states have internal predecessors, (404), 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) [2021-12-06 17:53:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 404 transitions. [2021-12-06 17:53:07,224 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 404 transitions. Word has length 392 [2021-12-06 17:53:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:07,225 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 404 transitions. [2021-12-06 17:53:07,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 5.845070422535211) internal successors, (415), 71 states have internal predecessors, (415), 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) [2021-12-06 17:53:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 404 transitions. [2021-12-06 17:53:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-12-06 17:53:07,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:07,226 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 65, 65, 65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:07,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-12-06 17:53:07,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-12-06 17:53:07,428 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:07,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:07,429 INFO L85 PathProgramCache]: Analyzing trace with hash 316609291, now seen corresponding path program 77 times [2021-12-06 17:53:07,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:07,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639220367] [2021-12-06 17:53:07,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:07,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12610 backedges. 8258 proven. 4352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:10,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:10,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639220367] [2021-12-06 17:53:10,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639220367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:10,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526900979] [2021-12-06 17:53:10,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:53:10,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:10,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:10,362 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:10,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-12-06 17:53:10,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-12-06 17:53:10,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:10,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1469 conjuncts, 133 conjunts are in the unsatisfiable core [2021-12-06 17:53:10,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12610 backedges. 8450 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:14,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12610 backedges. 8450 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:15,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526900979] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:15,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:15,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133, 133] total 203 [2021-12-06 17:53:15,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488960845] [2021-12-06 17:53:15,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:15,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-12-06 17:53:15,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:15,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-12-06 17:53:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9250, Invalid=31756, Unknown=0, NotChecked=0, Total=41006 [2021-12-06 17:53:15,253 INFO L87 Difference]: Start difference. First operand 401 states and 404 transitions. Second operand has 203 states, 203 states have (on average 3.334975369458128) internal successors, (677), 203 states have internal predecessors, (677), 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) [2021-12-06 17:53:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:20,574 INFO L93 Difference]: Finished difference Result 1195 states and 1332 transitions. [2021-12-06 17:53:20,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2021-12-06 17:53:20,575 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 3.334975369458128) internal successors, (677), 203 states have internal predecessors, (677), 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 [2021-12-06 17:53:20,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:20,577 INFO L225 Difference]: With dead ends: 1195 [2021-12-06 17:53:20,577 INFO L226 Difference]: Without dead ends: 669 [2021-12-06 17:53:20,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 730 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26836 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=26871, Invalid=84351, Unknown=0, NotChecked=0, Total=111222 [2021-12-06 17:53:20,581 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 1329 mSDsluCounter, 2232 mSDsCounter, 0 mSdLazyCounter, 2566 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 2367 SdHoareTripleChecker+Invalid, 3337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:20,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1329 Valid, 2367 Invalid, 3337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2566 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 17:53:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-12-06 17:53:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 405. [2021-12-06 17:53:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.00990099009901) internal successors, (408), 404 states have internal predecessors, (408), 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) [2021-12-06 17:53:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 408 transitions. [2021-12-06 17:53:20,622 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 408 transitions. Word has length 400 [2021-12-06 17:53:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:20,622 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 408 transitions. [2021-12-06 17:53:20,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 3.334975369458128) internal successors, (677), 203 states have internal predecessors, (677), 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) [2021-12-06 17:53:20,622 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 408 transitions. [2021-12-06 17:53:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-12-06 17:53:20,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:20,623 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 66, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:20,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-12-06 17:53:20,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-12-06 17:53:20,825 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:20,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:20,826 INFO L85 PathProgramCache]: Analyzing trace with hash -523441387, now seen corresponding path program 78 times [2021-12-06 17:53:20,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:20,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48098006] [2021-12-06 17:53:20,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:20,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12872 backedges. 4290 proven. 8582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:21,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:21,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48098006] [2021-12-06 17:53:21,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48098006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:21,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822775185] [2021-12-06 17:53:21,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:53:21,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:21,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:21,969 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:21,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-12-06 17:53:22,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-12-06 17:53:22,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:22,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-06 17:53:22,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12872 backedges. 4422 proven. 8450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:22,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12872 backedges. 4422 proven. 8450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:23,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822775185] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:23,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:23,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 73 [2021-12-06 17:53:23,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989670313] [2021-12-06 17:53:23,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:23,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-06 17:53:23,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:23,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-06 17:53:23,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2424, Invalid=2832, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 17:53:23,005 INFO L87 Difference]: Start difference. First operand 405 states and 408 transitions. Second operand has 73 states, 73 states have (on average 5.8493150684931505) internal successors, (427), 73 states have internal predecessors, (427), 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) [2021-12-06 17:53:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:24,005 INFO L93 Difference]: Finished difference Result 422 states and 426 transitions. [2021-12-06 17:53:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-12-06 17:53:24,005 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 5.8493150684931505) internal successors, (427), 73 states have internal predecessors, (427), 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 404 [2021-12-06 17:53:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:24,007 INFO L225 Difference]: With dead ends: 422 [2021-12-06 17:53:24,007 INFO L226 Difference]: Without dead ends: 420 [2021-12-06 17:53:24,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 869 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5079 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=7392, Invalid=12630, Unknown=0, NotChecked=0, Total=20022 [2021-12-06 17:53:24,008 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 358 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:24,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 699 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:53:24,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-12-06 17:53:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 413. [2021-12-06 17:53:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.0097087378640777) internal successors, (416), 412 states have internal predecessors, (416), 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) [2021-12-06 17:53:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 416 transitions. [2021-12-06 17:53:24,049 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 416 transitions. Word has length 404 [2021-12-06 17:53:24,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:24,049 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 416 transitions. [2021-12-06 17:53:24,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 5.8493150684931505) internal successors, (427), 73 states have internal predecessors, (427), 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) [2021-12-06 17:53:24,050 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 416 transitions. [2021-12-06 17:53:24,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-12-06 17:53:24,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:24,051 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 67, 67, 67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:24,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-12-06 17:53:24,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:24,252 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:24,253 INFO L85 PathProgramCache]: Analyzing trace with hash -98871301, now seen corresponding path program 79 times [2021-12-06 17:53:24,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:24,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878527653] [2021-12-06 17:53:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:24,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13400 backedges. 8780 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:27,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:27,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878527653] [2021-12-06 17:53:27,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878527653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:27,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121786140] [2021-12-06 17:53:27,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:53:27,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:27,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:27,231 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:27,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-12-06 17:53:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:27,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1513 conjuncts, 136 conjunts are in the unsatisfiable core [2021-12-06 17:53:27,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13400 backedges. 8976 proven. 4422 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:53:31,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13400 backedges. 8976 proven. 4422 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:53:32,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121786140] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:32,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:32,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 136, 136] total 206 [2021-12-06 17:53:32,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336188033] [2021-12-06 17:53:32,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:32,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2021-12-06 17:53:32,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:32,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2021-12-06 17:53:32,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9456, Invalid=32774, Unknown=0, NotChecked=0, Total=42230 [2021-12-06 17:53:32,202 INFO L87 Difference]: Start difference. First operand 413 states and 416 transitions. Second operand has 206 states, 206 states have (on average 3.3398058252427183) internal successors, (688), 206 states have internal predecessors, (688), 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) [2021-12-06 17:53:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:35,627 INFO L93 Difference]: Finished difference Result 956 states and 1094 transitions. [2021-12-06 17:53:35,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-12-06 17:53:35,627 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 3.3398058252427183) internal successors, (688), 206 states have internal predecessors, (688), 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 412 [2021-12-06 17:53:35,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:35,630 INFO L225 Difference]: With dead ends: 956 [2021-12-06 17:53:35,630 INFO L226 Difference]: Without dead ends: 683 [2021-12-06 17:53:35,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1026 GetRequests, 755 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16402 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=18570, Invalid=55686, Unknown=0, NotChecked=0, Total=74256 [2021-12-06 17:53:35,633 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 1452 mSDsluCounter, 1605 mSDsCounter, 0 mSdLazyCounter, 1931 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 2586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 1931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:35,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1452 Valid, 1744 Invalid, 2586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 1931 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 17:53:35,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-12-06 17:53:35,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 415. [2021-12-06 17:53:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 1.0096618357487923) internal successors, (418), 414 states have internal predecessors, (418), 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) [2021-12-06 17:53:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 418 transitions. [2021-12-06 17:53:35,675 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 418 transitions. Word has length 412 [2021-12-06 17:53:35,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:35,675 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 418 transitions. [2021-12-06 17:53:35,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 3.3398058252427183) internal successors, (688), 206 states have internal predecessors, (688), 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) [2021-12-06 17:53:35,675 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 418 transitions. [2021-12-06 17:53:35,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-12-06 17:53:35,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:35,677 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:35,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-12-06 17:53:35,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-12-06 17:53:35,878 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:35,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1901723872, now seen corresponding path program 80 times [2021-12-06 17:53:35,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:35,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282675199] [2021-12-06 17:53:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:35,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13534 backedges. 8780 proven. 4754 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:38,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:38,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282675199] [2021-12-06 17:53:38,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282675199] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:38,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920312250] [2021-12-06 17:53:38,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:53:38,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:38,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:38,820 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:38,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-12-06 17:53:38,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:53:38,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:38,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 138 conjunts are in the unsatisfiable core [2021-12-06 17:53:38,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13534 backedges. 4556 proven. 8978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:41,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13534 backedges. 4556 proven. 8978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:42,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920312250] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:42,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:42,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 71, 71] total 207 [2021-12-06 17:53:42,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380876852] [2021-12-06 17:53:42,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:42,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2021-12-06 17:53:42,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:42,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2021-12-06 17:53:42,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7178, Invalid=35464, Unknown=0, NotChecked=0, Total=42642 [2021-12-06 17:53:42,363 INFO L87 Difference]: Start difference. First operand 415 states and 418 transitions. Second operand has 207 states, 207 states have (on average 3.9903381642512077) internal successors, (826), 207 states have internal predecessors, (826), 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) [2021-12-06 17:53:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:50,380 INFO L93 Difference]: Finished difference Result 971 states and 1112 transitions. [2021-12-06 17:53:50,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2021-12-06 17:53:50,381 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 3.9903381642512077) internal successors, (826), 207 states have internal predecessors, (826), 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 414 [2021-12-06 17:53:50,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:50,383 INFO L225 Difference]: With dead ends: 971 [2021-12-06 17:53:50,383 INFO L226 Difference]: Without dead ends: 696 [2021-12-06 17:53:50,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1304 GetRequests, 826 SyntacticMatches, 1 SemanticMatches, 477 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79526 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=35876, Invalid=193086, Unknown=0, NotChecked=0, Total=228962 [2021-12-06 17:53:50,392 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 2203 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 4668 mSolverCounterSat, 1662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2203 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 6330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1662 IncrementalHoareTripleChecker+Valid, 4668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:50,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2203 Valid, 1205 Invalid, 6330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1662 Valid, 4668 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 17:53:50,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-12-06 17:53:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 421. [2021-12-06 17:53:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.0095238095238095) internal successors, (424), 420 states have internal predecessors, (424), 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) [2021-12-06 17:53:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 424 transitions. [2021-12-06 17:53:50,450 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 424 transitions. Word has length 414 [2021-12-06 17:53:50,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:50,450 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 424 transitions. [2021-12-06 17:53:50,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 3.9903381642512077) internal successors, (826), 207 states have internal predecessors, (826), 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) [2021-12-06 17:53:50,450 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 424 transitions. [2021-12-06 17:53:50,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-12-06 17:53:50,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:50,451 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:50,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-12-06 17:53:50,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:50,653 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:50,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:50,654 INFO L85 PathProgramCache]: Analyzing trace with hash 591566904, now seen corresponding path program 81 times [2021-12-06 17:53:50,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:50,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623391393] [2021-12-06 17:53:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:50,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 13940 backedges. 9047 proven. 4893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:53,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:53,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623391393] [2021-12-06 17:53:53,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623391393] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:53,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064638382] [2021-12-06 17:53:53,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:53:53,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:53,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:53,897 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:53,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-12-06 17:53:54,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2021-12-06 17:53:54,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:54,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1545 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-06 17:53:54,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13940 backedges. 4692 proven. 9248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:57,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13940 backedges. 4692 proven. 9248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:57,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064638382] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:57,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:57,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 72, 72] total 210 [2021-12-06 17:53:57,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732492739] [2021-12-06 17:53:57,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:57,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 210 states [2021-12-06 17:53:57,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:57,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2021-12-06 17:53:57,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7387, Invalid=36503, Unknown=0, NotChecked=0, Total=43890 [2021-12-06 17:53:57,793 INFO L87 Difference]: Start difference. First operand 421 states and 424 transitions. Second operand has 210 states, 210 states have (on average 3.9904761904761905) internal successors, (838), 210 states have internal predecessors, (838), 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) [2021-12-06 17:54:05,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:05,941 INFO L93 Difference]: Finished difference Result 985 states and 1128 transitions. [2021-12-06 17:54:05,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2021-12-06 17:54:05,941 INFO L78 Accepts]: Start accepts. Automaton has has 210 states, 210 states have (on average 3.9904761904761905) internal successors, (838), 210 states have internal predecessors, (838), 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 420 [2021-12-06 17:54:05,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:05,944 INFO L225 Difference]: With dead ends: 985 [2021-12-06 17:54:05,944 INFO L226 Difference]: Without dead ends: 706 [2021-12-06 17:54:05,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1323 GetRequests, 838 SyntacticMatches, 1 SemanticMatches, 484 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81903 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=36921, Invalid=198789, Unknown=0, NotChecked=0, Total=235710 [2021-12-06 17:54:05,953 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1898 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 5316 mSolverCounterSat, 1737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1898 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 7053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1737 IncrementalHoareTripleChecker+Valid, 5316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:05,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1898 Valid, 1344 Invalid, 7053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1737 Valid, 5316 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 17:54:05,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-12-06 17:54:06,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 427. [2021-12-06 17:54:06,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.0093896713615023) internal successors, (430), 426 states have internal predecessors, (430), 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) [2021-12-06 17:54:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 430 transitions. [2021-12-06 17:54:06,009 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 430 transitions. Word has length 420 [2021-12-06 17:54:06,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:06,009 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 430 transitions. [2021-12-06 17:54:06,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 210 states, 210 states have (on average 3.9904761904761905) internal successors, (838), 210 states have internal predecessors, (838), 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) [2021-12-06 17:54:06,009 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 430 transitions. [2021-12-06 17:54:06,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-12-06 17:54:06,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:06,011 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:06,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-12-06 17:54:06,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:06,212 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:06,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:06,213 INFO L85 PathProgramCache]: Analyzing trace with hash 603784592, now seen corresponding path program 82 times [2021-12-06 17:54:06,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:06,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564243617] [2021-12-06 17:54:06,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:06,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14352 backedges. 9318 proven. 5034 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:09,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:09,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564243617] [2021-12-06 17:54:09,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564243617] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:09,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510656763] [2021-12-06 17:54:09,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:54:09,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:09,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:09,372 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:09,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-12-06 17:54:09,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:54:09,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:09,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 1567 conjuncts, 142 conjunts are in the unsatisfiable core [2021-12-06 17:54:09,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14352 backedges. 4830 proven. 9522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:12,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 14352 backedges. 4830 proven. 9522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:13,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510656763] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:13,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:13,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 73, 73] total 213 [2021-12-06 17:54:13,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535900654] [2021-12-06 17:54:13,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:13,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2021-12-06 17:54:13,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:13,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2021-12-06 17:54:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7599, Invalid=37557, Unknown=0, NotChecked=0, Total=45156 [2021-12-06 17:54:13,048 INFO L87 Difference]: Start difference. First operand 427 states and 430 transitions. Second operand has 213 states, 213 states have (on average 3.9906103286384975) internal successors, (850), 213 states have internal predecessors, (850), 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) [2021-12-06 17:54:21,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:21,293 INFO L93 Difference]: Finished difference Result 999 states and 1144 transitions. [2021-12-06 17:54:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 285 states. [2021-12-06 17:54:21,293 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 3.9906103286384975) internal successors, (850), 213 states have internal predecessors, (850), 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 426 [2021-12-06 17:54:21,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:21,296 INFO L225 Difference]: With dead ends: 999 [2021-12-06 17:54:21,296 INFO L226 Difference]: Without dead ends: 716 [2021-12-06 17:54:21,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1342 GetRequests, 850 SyntacticMatches, 1 SemanticMatches, 491 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84315 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=37981, Invalid=204575, Unknown=0, NotChecked=0, Total=242556 [2021-12-06 17:54:21,306 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 2117 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 5213 mSolverCounterSat, 1644 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2117 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 6857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1644 IncrementalHoareTripleChecker+Valid, 5213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:21,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2117 Valid, 1458 Invalid, 6857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1644 Valid, 5213 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 17:54:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-12-06 17:54:21,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 433. [2021-12-06 17:54:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.0092592592592593) internal successors, (436), 432 states have internal predecessors, (436), 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) [2021-12-06 17:54:21,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 436 transitions. [2021-12-06 17:54:21,377 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 436 transitions. Word has length 426 [2021-12-06 17:54:21,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:21,377 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 436 transitions. [2021-12-06 17:54:21,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 3.9906103286384975) internal successors, (850), 213 states have internal predecessors, (850), 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) [2021-12-06 17:54:21,378 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 436 transitions. [2021-12-06 17:54:21,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2021-12-06 17:54:21,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:21,379 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:21,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-12-06 17:54:21,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:21,580 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:21,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:21,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1514665768, now seen corresponding path program 83 times [2021-12-06 17:54:21,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:21,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841266004] [2021-12-06 17:54:21,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:21,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14770 backedges. 9593 proven. 5177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:25,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:25,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841266004] [2021-12-06 17:54:25,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841266004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:25,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339551731] [2021-12-06 17:54:25,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:54:25,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:25,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:25,292 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:25,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-12-06 17:54:25,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 71 check-sat command(s) [2021-12-06 17:54:25,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:25,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-06 17:54:25,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 14770 backedges. 9800 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:30,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14770 backedges. 9800 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:30,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339551731] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:30,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:30,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144, 144] total 217 [2021-12-06 17:54:30,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642641938] [2021-12-06 17:54:30,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:30,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 217 states [2021-12-06 17:54:30,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:30,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 217 interpolants. [2021-12-06 17:54:30,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10515, Invalid=36357, Unknown=0, NotChecked=0, Total=46872 [2021-12-06 17:54:30,737 INFO L87 Difference]: Start difference. First operand 433 states and 436 transitions. Second operand has 217 states, 217 states have (on average 3.3179723502304146) internal successors, (720), 217 states have internal predecessors, (720), 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) [2021-12-06 17:54:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:34,788 INFO L93 Difference]: Finished difference Result 1006 states and 1152 transitions. [2021-12-06 17:54:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-12-06 17:54:34,788 INFO L78 Accepts]: Start accepts. Automaton has has 217 states, 217 states have (on average 3.3179723502304146) internal successors, (720), 217 states have internal predecessors, (720), 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 432 [2021-12-06 17:54:34,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:34,791 INFO L225 Difference]: With dead ends: 1006 [2021-12-06 17:54:34,791 INFO L226 Difference]: Without dead ends: 719 [2021-12-06 17:54:34,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1077 GetRequests, 791 SyntacticMatches, 0 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18163 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=20741, Invalid=61915, Unknown=0, NotChecked=0, Total=82656 [2021-12-06 17:54:34,794 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 1136 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:34,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1136 Valid, 1896 Invalid, 2612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:54:34,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-12-06 17:54:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 435. [2021-12-06 17:54:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.0092165898617511) internal successors, (438), 434 states have internal predecessors, (438), 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) [2021-12-06 17:54:34,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 438 transitions. [2021-12-06 17:54:34,841 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 438 transitions. Word has length 432 [2021-12-06 17:54:34,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:34,841 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 438 transitions. [2021-12-06 17:54:34,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 217 states, 217 states have (on average 3.3179723502304146) internal successors, (720), 217 states have internal predecessors, (720), 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) [2021-12-06 17:54:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 438 transitions. [2021-12-06 17:54:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-12-06 17:54:34,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:34,843 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 71, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:34,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-12-06 17:54:35,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-12-06 17:54:35,045 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:35,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:35,045 INFO L85 PathProgramCache]: Analyzing trace with hash -535520819, now seen corresponding path program 84 times [2021-12-06 17:54:35,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:35,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954861861] [2021-12-06 17:54:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:35,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14912 backedges. 4970 proven. 9942 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:36,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:36,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954861861] [2021-12-06 17:54:36,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954861861] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:36,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87281249] [2021-12-06 17:54:36,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:54:36,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:36,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:36,424 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:36,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-12-06 17:54:36,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 72 check-sat command(s) [2021-12-06 17:54:36,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:36,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 145 conjunts are in the unsatisfiable core [2021-12-06 17:54:36,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 14912 backedges. 5112 proven. 9800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:37,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14912 backedges. 5112 proven. 9800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:37,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87281249] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:37,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:37,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 78 [2021-12-06 17:54:37,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211434355] [2021-12-06 17:54:37,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:37,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-06 17:54:37,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:37,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-06 17:54:37,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2784, Invalid=3222, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 17:54:37,583 INFO L87 Difference]: Start difference. First operand 435 states and 438 transitions. Second operand has 78 states, 78 states have (on average 5.858974358974359) internal successors, (457), 78 states have internal predecessors, (457), 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) [2021-12-06 17:54:38,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:38,673 INFO L93 Difference]: Finished difference Result 452 states and 456 transitions. [2021-12-06 17:54:38,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-12-06 17:54:38,673 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 5.858974358974359) internal successors, (457), 78 states have internal predecessors, (457), 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 434 [2021-12-06 17:54:38,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:38,675 INFO L225 Difference]: With dead ends: 452 [2021-12-06 17:54:38,675 INFO L226 Difference]: Without dead ends: 450 [2021-12-06 17:54:38,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1085 GetRequests, 934 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5819 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=8482, Invalid=14470, Unknown=0, NotChecked=0, Total=22952 [2021-12-06 17:54:38,676 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 450 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:38,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 613 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:54:38,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-12-06 17:54:38,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 443. [2021-12-06 17:54:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.009049773755656) internal successors, (446), 442 states have internal predecessors, (446), 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) [2021-12-06 17:54:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 446 transitions. [2021-12-06 17:54:38,723 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 446 transitions. Word has length 434 [2021-12-06 17:54:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:38,723 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 446 transitions. [2021-12-06 17:54:38,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 5.858974358974359) internal successors, (457), 78 states have internal predecessors, (457), 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) [2021-12-06 17:54:38,723 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 446 transitions. [2021-12-06 17:54:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-12-06 17:54:38,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:38,725 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 72, 72, 72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:38,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-12-06 17:54:38,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:38,926 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:38,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:38,927 INFO L85 PathProgramCache]: Analyzing trace with hash -687550797, now seen corresponding path program 85 times [2021-12-06 17:54:38,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:38,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285939393] [2021-12-06 17:54:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:38,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 15480 backedges. 10155 proven. 5325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:42,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:42,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285939393] [2021-12-06 17:54:42,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285939393] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:42,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153825566] [2021-12-06 17:54:42,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:54:42,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:42,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:42,320 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:42,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-12-06 17:54:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:42,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1623 conjuncts, 146 conjunts are in the unsatisfiable core [2021-12-06 17:54:42,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15480 backedges. 10366 proven. 5112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:54:47,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15480 backedges. 10366 proven. 5112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:54:47,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153825566] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:47,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:47,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 146, 146] total 221 [2021-12-06 17:54:47,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262107865] [2021-12-06 17:54:47,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:47,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 221 states [2021-12-06 17:54:47,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:47,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2021-12-06 17:54:47,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10881, Invalid=37739, Unknown=0, NotChecked=0, Total=48620 [2021-12-06 17:54:47,832 INFO L87 Difference]: Start difference. First operand 443 states and 446 transitions. Second operand has 221 states, 221 states have (on average 3.339366515837104) internal successors, (738), 221 states have internal predecessors, (738), 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) [2021-12-06 17:54:51,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:51,759 INFO L93 Difference]: Finished difference Result 1026 states and 1174 transitions. [2021-12-06 17:54:51,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-12-06 17:54:51,759 INFO L78 Accepts]: Start accepts. Automaton has has 221 states, 221 states have (on average 3.339366515837104) internal successors, (738), 221 states have internal predecessors, (738), 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 442 [2021-12-06 17:54:51,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:51,762 INFO L225 Difference]: With dead ends: 1026 [2021-12-06 17:54:51,762 INFO L226 Difference]: Without dead ends: 733 [2021-12-06 17:54:51,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1101 GetRequests, 810 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18887 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=21395, Invalid=64161, Unknown=0, NotChecked=0, Total=85556 [2021-12-06 17:54:51,766 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 1246 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:51,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1246 Valid, 1784 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 1987 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 17:54:51,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-12-06 17:54:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 445. [2021-12-06 17:54:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.009009009009009) internal successors, (448), 444 states have internal predecessors, (448), 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) [2021-12-06 17:54:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 448 transitions. [2021-12-06 17:54:51,814 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 448 transitions. Word has length 442 [2021-12-06 17:54:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:51,815 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 448 transitions. [2021-12-06 17:54:51,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 221 states, 221 states have (on average 3.339366515837104) internal successors, (738), 221 states have internal predecessors, (738), 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) [2021-12-06 17:54:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 448 transitions. [2021-12-06 17:54:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-12-06 17:54:51,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:51,816 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:51,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-12-06 17:54:52,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-12-06 17:54:52,018 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:52,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1045833496, now seen corresponding path program 86 times [2021-12-06 17:54:52,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:52,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616081027] [2021-12-06 17:54:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:52,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15624 backedges. 10155 proven. 5469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:55,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:55,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616081027] [2021-12-06 17:54:55,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616081027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:55,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677061648] [2021-12-06 17:54:55,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:54:55,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:55,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:55,567 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:55,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-12-06 17:54:55,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:54:55,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:55,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1633 conjuncts, 148 conjunts are in the unsatisfiable core [2021-12-06 17:54:55,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 15624 backedges. 10368 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:00,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 15624 backedges. 10368 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:00,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677061648] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:00,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:00,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148, 148] total 223 [2021-12-06 17:55:00,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984441142] [2021-12-06 17:55:00,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:00,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 223 states [2021-12-06 17:55:00,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:00,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 223 interpolants. [2021-12-06 17:55:00,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11103, Invalid=38403, Unknown=0, NotChecked=0, Total=49506 [2021-12-06 17:55:00,912 INFO L87 Difference]: Start difference. First operand 445 states and 448 transitions. Second operand has 223 states, 223 states have (on average 3.318385650224215) internal successors, (740), 223 states have internal predecessors, (740), 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) [2021-12-06 17:55:05,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:05,183 INFO L93 Difference]: Finished difference Result 1034 states and 1184 transitions. [2021-12-06 17:55:05,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-12-06 17:55:05,183 INFO L78 Accepts]: Start accepts. Automaton has has 223 states, 223 states have (on average 3.318385650224215) internal successors, (740), 223 states have internal predecessors, (740), 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 444 [2021-12-06 17:55:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:05,185 INFO L225 Difference]: With dead ends: 1034 [2021-12-06 17:55:05,185 INFO L226 Difference]: Without dead ends: 739 [2021-12-06 17:55:05,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1107 GetRequests, 813 SyntacticMatches, 0 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19186 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=21909, Invalid=65411, Unknown=0, NotChecked=0, Total=87320 [2021-12-06 17:55:05,189 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 1265 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 2741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:05,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1265 Valid, 2038 Invalid, 2741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 17:55:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-12-06 17:55:05,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 447. [2021-12-06 17:55:05,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.0089686098654709) internal successors, (450), 446 states have internal predecessors, (450), 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) [2021-12-06 17:55:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 450 transitions. [2021-12-06 17:55:05,238 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 450 transitions. Word has length 444 [2021-12-06 17:55:05,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:05,238 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 450 transitions. [2021-12-06 17:55:05,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 223 states, 223 states have (on average 3.318385650224215) internal successors, (740), 223 states have internal predecessors, (740), 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) [2021-12-06 17:55:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 450 transitions. [2021-12-06 17:55:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2021-12-06 17:55:05,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:05,240 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 73, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:05,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-12-06 17:55:05,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-12-06 17:55:05,441 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:05,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:05,442 INFO L85 PathProgramCache]: Analyzing trace with hash 380828221, now seen corresponding path program 87 times [2021-12-06 17:55:05,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:05,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417529909] [2021-12-06 17:55:05,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:05,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15770 backedges. 5256 proven. 10514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:06,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:06,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417529909] [2021-12-06 17:55:06,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417529909] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:06,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839402588] [2021-12-06 17:55:06,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:55:06,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:06,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:06,869 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:06,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-12-06 17:55:07,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 74 check-sat command(s) [2021-12-06 17:55:07,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:07,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1643 conjuncts, 149 conjunts are in the unsatisfiable core [2021-12-06 17:55:07,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 15770 backedges. 5402 proven. 10368 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:07,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15770 backedges. 5402 proven. 10368 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:08,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839402588] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:08,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:08,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 80 [2021-12-06 17:55:08,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685197120] [2021-12-06 17:55:08,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:08,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 17:55:08,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:08,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 17:55:08,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2935, Invalid=3385, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 17:55:08,194 INFO L87 Difference]: Start difference. First operand 447 states and 450 transitions. Second operand has 80 states, 80 states have (on average 5.8625) internal successors, (469), 80 states have internal predecessors, (469), 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) [2021-12-06 17:55:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:09,317 INFO L93 Difference]: Finished difference Result 464 states and 468 transitions. [2021-12-06 17:55:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-12-06 17:55:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 5.8625) internal successors, (469), 80 states have internal predecessors, (469), 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 446 [2021-12-06 17:55:09,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:09,319 INFO L225 Difference]: With dead ends: 464 [2021-12-06 17:55:09,319 INFO L226 Difference]: Without dead ends: 462 [2021-12-06 17:55:09,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1115 GetRequests, 960 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6129 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=8939, Invalid=15241, Unknown=0, NotChecked=0, Total=24180 [2021-12-06 17:55:09,321 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 468 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:09,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 591 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:55:09,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-06 17:55:09,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 455. [2021-12-06 17:55:09,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 1.0088105726872247) internal successors, (458), 454 states have internal predecessors, (458), 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) [2021-12-06 17:55:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 458 transitions. [2021-12-06 17:55:09,378 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 458 transitions. Word has length 446 [2021-12-06 17:55:09,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:09,378 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 458 transitions. [2021-12-06 17:55:09,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 5.8625) internal successors, (469), 80 states have internal predecessors, (469), 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) [2021-12-06 17:55:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 458 transitions. [2021-12-06 17:55:09,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2021-12-06 17:55:09,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:09,380 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 74, 74, 74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:09,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-12-06 17:55:09,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:09,581 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:09,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:09,582 INFO L85 PathProgramCache]: Analyzing trace with hash 389267235, now seen corresponding path program 88 times [2021-12-06 17:55:09,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:09,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844575786] [2021-12-06 17:55:09,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:09,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16354 backedges. 10733 proven. 5621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:13,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:13,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844575786] [2021-12-06 17:55:13,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844575786] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:13,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628250101] [2021-12-06 17:55:13,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:55:13,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:13,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:13,233 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:13,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-12-06 17:55:13,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:55:13,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:13,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 1667 conjuncts, 151 conjunts are in the unsatisfiable core [2021-12-06 17:55:13,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16354 backedges. 10952 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:18,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16354 backedges. 10952 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:18,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628250101] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:18,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:18,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151, 151] total 230 [2021-12-06 17:55:18,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710440199] [2021-12-06 17:55:18,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:18,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 230 states [2021-12-06 17:55:18,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:18,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2021-12-06 17:55:18,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11860, Invalid=40810, Unknown=0, NotChecked=0, Total=52670 [2021-12-06 17:55:18,806 INFO L87 Difference]: Start difference. First operand 455 states and 458 transitions. Second operand has 230 states, 230 states have (on average 3.3347826086956522) internal successors, (767), 230 states have internal predecessors, (767), 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) [2021-12-06 17:55:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:25,796 INFO L93 Difference]: Finished difference Result 1357 states and 1512 transitions. [2021-12-06 17:55:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-12-06 17:55:25,796 INFO L78 Accepts]: Start accepts. Automaton has has 230 states, 230 states have (on average 3.3347826086956522) internal successors, (767), 230 states have internal predecessors, (767), 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 454 [2021-12-06 17:55:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:25,797 INFO L225 Difference]: With dead ends: 1357 [2021-12-06 17:55:25,797 INFO L226 Difference]: Without dead ends: 759 [2021-12-06 17:55:25,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1206 GetRequests, 829 SyntacticMatches, 0 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34549 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=34584, Invalid=108678, Unknown=0, NotChecked=0, Total=143262 [2021-12-06 17:55:25,803 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 1519 mSDsluCounter, 2413 mSDsCounter, 0 mSdLazyCounter, 2792 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 2566 SdHoareTripleChecker+Invalid, 3441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 2792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:25,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1519 Valid, 2566 Invalid, 3441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 2792 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 17:55:25,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-12-06 17:55:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 459. [2021-12-06 17:55:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.0087336244541485) internal successors, (462), 458 states have internal predecessors, (462), 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) [2021-12-06 17:55:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 462 transitions. [2021-12-06 17:55:25,863 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 462 transitions. Word has length 454 [2021-12-06 17:55:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:25,863 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 462 transitions. [2021-12-06 17:55:25,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 230 states, 230 states have (on average 3.3347826086956522) internal successors, (767), 230 states have internal predecessors, (767), 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) [2021-12-06 17:55:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 462 transitions. [2021-12-06 17:55:25,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-12-06 17:55:25,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:25,865 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 75, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:25,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-12-06 17:55:26,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:26,065 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:26,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:26,066 INFO L85 PathProgramCache]: Analyzing trace with hash -694490195, now seen corresponding path program 89 times [2021-12-06 17:55:26,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:26,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543719254] [2021-12-06 17:55:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:26,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16652 backedges. 5550 proven. 11102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:27,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:27,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543719254] [2021-12-06 17:55:27,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543719254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:27,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121162087] [2021-12-06 17:55:27,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:55:27,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:27,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:27,554 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:27,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-12-06 17:55:28,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2021-12-06 17:55:28,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:28,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 153 conjunts are in the unsatisfiable core [2021-12-06 17:55:28,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16652 backedges. 5700 proven. 10952 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:28,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16652 backedges. 5700 proven. 10952 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:28,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121162087] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:28,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:28,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 82 [2021-12-06 17:55:28,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551650845] [2021-12-06 17:55:28,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:28,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 17:55:28,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:28,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 17:55:28,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3090, Invalid=3552, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 17:55:28,913 INFO L87 Difference]: Start difference. First operand 459 states and 462 transitions. Second operand has 82 states, 82 states have (on average 5.865853658536586) internal successors, (481), 82 states have internal predecessors, (481), 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) [2021-12-06 17:55:30,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:30,137 INFO L93 Difference]: Finished difference Result 476 states and 480 transitions. [2021-12-06 17:55:30,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-12-06 17:55:30,138 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 5.865853658536586) internal successors, (481), 82 states have internal predecessors, (481), 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 458 [2021-12-06 17:55:30,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:30,138 INFO L225 Difference]: With dead ends: 476 [2021-12-06 17:55:30,139 INFO L226 Difference]: Without dead ends: 474 [2021-12-06 17:55:30,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1145 GetRequests, 986 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6447 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9408, Invalid=16032, Unknown=0, NotChecked=0, Total=25440 [2021-12-06 17:55:30,140 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 318 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:30,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 747 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:55:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-12-06 17:55:30,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 467. [2021-12-06 17:55:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 1.0085836909871244) internal successors, (470), 466 states have internal predecessors, (470), 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) [2021-12-06 17:55:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 470 transitions. [2021-12-06 17:55:30,192 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 470 transitions. Word has length 458 [2021-12-06 17:55:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:30,193 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 470 transitions. [2021-12-06 17:55:30,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 5.865853658536586) internal successors, (481), 82 states have internal predecessors, (481), 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) [2021-12-06 17:55:30,193 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 470 transitions. [2021-12-06 17:55:30,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2021-12-06 17:55:30,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:30,194 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 76, 76, 76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:30,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-12-06 17:55:30,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:30,396 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:30,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1250640019, now seen corresponding path program 90 times [2021-12-06 17:55:30,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:30,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159650211] [2021-12-06 17:55:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:30,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17252 backedges. 11327 proven. 5925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:34,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:34,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159650211] [2021-12-06 17:55:34,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159650211] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:34,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114736808] [2021-12-06 17:55:34,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:55:34,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:34,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:34,155 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:34,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-12-06 17:55:34,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 77 check-sat command(s) [2021-12-06 17:55:34,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:34,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 1711 conjuncts, 155 conjunts are in the unsatisfiable core [2021-12-06 17:55:34,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 17252 backedges. 11552 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:40,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 17252 backedges. 11552 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:40,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114736808] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:40,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:40,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155, 155] total 236 [2021-12-06 17:55:40,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257056961] [2021-12-06 17:55:40,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:40,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 236 states [2021-12-06 17:55:40,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:40,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2021-12-06 17:55:40,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12484, Invalid=42976, Unknown=0, NotChecked=0, Total=55460 [2021-12-06 17:55:40,877 INFO L87 Difference]: Start difference. First operand 467 states and 470 transitions. Second operand has 236 states, 236 states have (on average 3.3347457627118646) internal successors, (787), 236 states have internal predecessors, (787), 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) [2021-12-06 17:55:48,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:48,504 INFO L93 Difference]: Finished difference Result 1393 states and 1552 transitions. [2021-12-06 17:55:48,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2021-12-06 17:55:48,504 INFO L78 Accepts]: Start accepts. Automaton has has 236 states, 236 states have (on average 3.3347457627118646) internal successors, (787), 236 states have internal predecessors, (787), 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 466 [2021-12-06 17:55:48,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:48,505 INFO L225 Difference]: With dead ends: 1393 [2021-12-06 17:55:48,505 INFO L226 Difference]: Without dead ends: 779 [2021-12-06 17:55:48,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1238 GetRequests, 851 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36395 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=36430, Invalid=114502, Unknown=0, NotChecked=0, Total=150932 [2021-12-06 17:55:48,512 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 1655 mSDsluCounter, 2559 mSDsCounter, 0 mSdLazyCounter, 2938 mSolverCounterSat, 767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1655 SdHoareTripleChecker+Valid, 2716 SdHoareTripleChecker+Invalid, 3705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 2938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:48,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1655 Valid, 2716 Invalid, 3705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [767 Valid, 2938 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 17:55:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-12-06 17:55:48,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 471. [2021-12-06 17:55:48,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.0085106382978724) internal successors, (474), 470 states have internal predecessors, (474), 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) [2021-12-06 17:55:48,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 474 transitions. [2021-12-06 17:55:48,565 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 474 transitions. Word has length 466 [2021-12-06 17:55:48,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:48,566 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 474 transitions. [2021-12-06 17:55:48,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 236 states, 236 states have (on average 3.3347457627118646) internal successors, (787), 236 states have internal predecessors, (787), 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) [2021-12-06 17:55:48,566 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 474 transitions. [2021-12-06 17:55:48,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-12-06 17:55:48,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:48,568 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 77, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:48,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-12-06 17:55:48,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:48,769 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:48,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:48,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1060236829, now seen corresponding path program 91 times [2021-12-06 17:55:48,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:48,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361801377] [2021-12-06 17:55:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:48,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17558 backedges. 5852 proven. 11706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:50,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:50,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361801377] [2021-12-06 17:55:50,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361801377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:50,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374444349] [2021-12-06 17:55:50,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:55:50,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:50,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:50,354 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:50,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-12-06 17:55:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:50,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 157 conjunts are in the unsatisfiable core [2021-12-06 17:55:50,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 17558 backedges. 6006 proven. 11552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:50,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17558 backedges. 6006 proven. 11552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:51,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374444349] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:51,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:51,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 84 [2021-12-06 17:55:51,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066571613] [2021-12-06 17:55:51,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:51,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-06 17:55:51,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:51,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-06 17:55:51,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3249, Invalid=3723, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 17:55:51,412 INFO L87 Difference]: Start difference. First operand 471 states and 474 transitions. Second operand has 84 states, 84 states have (on average 5.869047619047619) internal successors, (493), 84 states have internal predecessors, (493), 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) [2021-12-06 17:55:52,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:52,721 INFO L93 Difference]: Finished difference Result 488 states and 492 transitions. [2021-12-06 17:55:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-12-06 17:55:52,721 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 5.869047619047619) internal successors, (493), 84 states have internal predecessors, (493), 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 470 [2021-12-06 17:55:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:52,722 INFO L225 Difference]: With dead ends: 488 [2021-12-06 17:55:52,722 INFO L226 Difference]: Without dead ends: 486 [2021-12-06 17:55:52,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1175 GetRequests, 1012 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6773 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=9889, Invalid=16843, Unknown=0, NotChecked=0, Total=26732 [2021-12-06 17:55:52,723 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 494 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:52,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 615 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:55:52,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-12-06 17:55:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 479. [2021-12-06 17:55:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 1.00836820083682) internal successors, (482), 478 states have internal predecessors, (482), 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) [2021-12-06 17:55:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 482 transitions. [2021-12-06 17:55:52,778 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 482 transitions. Word has length 470 [2021-12-06 17:55:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:52,778 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 482 transitions. [2021-12-06 17:55:52,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 5.869047619047619) internal successors, (493), 84 states have internal predecessors, (493), 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) [2021-12-06 17:55:52,778 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 482 transitions. [2021-12-06 17:55:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-12-06 17:55:52,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:52,780 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 78, 78, 78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:52,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-12-06 17:55:52,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:52,981 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:52,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:52,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1829711101, now seen corresponding path program 92 times [2021-12-06 17:55:52,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:52,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691884655] [2021-12-06 17:55:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:52,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18174 backedges. 11937 proven. 6237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:57,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:57,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691884655] [2021-12-06 17:55:57,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691884655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:57,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806072681] [2021-12-06 17:55:57,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:55:57,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:57,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:57,248 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:57,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-12-06 17:55:57,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:55:57,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:57,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 158 conjunts are in the unsatisfiable core [2021-12-06 17:55:57,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:56:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18174 backedges. 12166 proven. 6006 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:56:02,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:56:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18174 backedges. 12166 proven. 6006 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:56:03,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806072681] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:56:03,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:56:03,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 158, 158] total 239 [2021-12-06 17:56:03,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105769166] [2021-12-06 17:56:03,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:56:03,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 239 states [2021-12-06 17:56:03,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:56:03,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 239 interpolants. [2021-12-06 17:56:03,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12723, Invalid=44159, Unknown=0, NotChecked=0, Total=56882 [2021-12-06 17:56:03,351 INFO L87 Difference]: Start difference. First operand 479 states and 482 transitions. Second operand has 239 states, 239 states have (on average 3.3389121338912133) internal successors, (798), 239 states have internal predecessors, (798), 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) [2021-12-06 17:56:08,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:56:08,554 INFO L93 Difference]: Finished difference Result 1110 states and 1270 transitions. [2021-12-06 17:56:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-12-06 17:56:08,554 INFO L78 Accepts]: Start accepts. Automaton has has 239 states, 239 states have (on average 3.3389121338912133) internal successors, (798), 239 states have internal predecessors, (798), 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 478 [2021-12-06 17:56:08,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:56:08,555 INFO L225 Difference]: With dead ends: 1110 [2021-12-06 17:56:08,555 INFO L226 Difference]: Without dead ends: 793 [2021-12-06 17:56:08,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1191 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22100 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=25049, Invalid=75123, Unknown=0, NotChecked=0, Total=100172 [2021-12-06 17:56:08,560 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 1420 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1420 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:56:08,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1420 Valid, 1910 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 2143 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 17:56:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-12-06 17:56:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 481. [2021-12-06 17:56:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.0083333333333333) internal successors, (484), 480 states have internal predecessors, (484), 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) [2021-12-06 17:56:08,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 484 transitions. [2021-12-06 17:56:08,629 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 484 transitions. Word has length 478 [2021-12-06 17:56:08,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:56:08,629 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 484 transitions. [2021-12-06 17:56:08,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 239 states, 239 states have (on average 3.3389121338912133) internal successors, (798), 239 states have internal predecessors, (798), 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) [2021-12-06 17:56:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 484 transitions. [2021-12-06 17:56:08,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2021-12-06 17:56:08,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:56:08,631 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:56:08,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-12-06 17:56:08,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-12-06 17:56:08,832 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:56:08,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:56:08,833 INFO L85 PathProgramCache]: Analyzing trace with hash -676553496, now seen corresponding path program 93 times [2021-12-06 17:56:08,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:56:08,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028075872] [2021-12-06 17:56:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:56:08,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:56:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18330 backedges. 11937 proven. 6393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:56:12,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:56:12,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028075872] [2021-12-06 17:56:12,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028075872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:56:12,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431218954] [2021-12-06 17:56:12,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:56:12,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:12,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:56:12,885 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:56:12,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-12-06 17:56:13,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 79 check-sat command(s) [2021-12-06 17:56:13,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:56:13,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 160 conjunts are in the unsatisfiable core [2021-12-06 17:56:13,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:56:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18330 backedges. 12168 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:56:18,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:56:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18330 backedges. 12168 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:56:19,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431218954] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:56:19,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:56:19,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [160, 160, 160] total 241 [2021-12-06 17:56:19,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20049521] [2021-12-06 17:56:19,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:56:19,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 241 states [2021-12-06 17:56:19,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:56:19,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 241 interpolants. [2021-12-06 17:56:19,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12963, Invalid=44877, Unknown=0, NotChecked=0, Total=57840 [2021-12-06 17:56:19,224 INFO L87 Difference]: Start difference. First operand 481 states and 484 transitions. Second operand has 241 states, 241 states have (on average 3.319502074688797) internal successors, (800), 241 states have internal predecessors, (800), 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) [2021-12-06 17:56:24,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:56:24,177 INFO L93 Difference]: Finished difference Result 1118 states and 1280 transitions. [2021-12-06 17:56:24,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-12-06 17:56:24,177 INFO L78 Accepts]: Start accepts. Automaton has has 241 states, 241 states have (on average 3.319502074688797) internal successors, (800), 241 states have internal predecessors, (800), 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 480 [2021-12-06 17:56:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:56:24,178 INFO L225 Difference]: With dead ends: 1118 [2021-12-06 17:56:24,178 INFO L226 Difference]: Without dead ends: 799 [2021-12-06 17:56:24,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1197 GetRequests, 879 SyntacticMatches, 0 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22423 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=25605, Invalid=76475, Unknown=0, NotChecked=0, Total=102080 [2021-12-06 17:56:24,183 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 1718 mSDsluCounter, 1790 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 1013 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 1953 SdHoareTripleChecker+Invalid, 3203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1013 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:56:24,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1718 Valid, 1953 Invalid, 3203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1013 Valid, 2190 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 17:56:24,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-12-06 17:56:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 483. [2021-12-06 17:56:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.008298755186722) internal successors, (486), 482 states have internal predecessors, (486), 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) [2021-12-06 17:56:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 486 transitions. [2021-12-06 17:56:24,239 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 486 transitions. Word has length 480 [2021-12-06 17:56:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:56:24,240 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 486 transitions. [2021-12-06 17:56:24,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 241 states, 241 states have (on average 3.319502074688797) internal successors, (800), 241 states have internal predecessors, (800), 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) [2021-12-06 17:56:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 486 transitions. [2021-12-06 17:56:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-12-06 17:56:24,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:56:24,242 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 79, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:56:24,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-12-06 17:56:24,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:24,443 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:56:24,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:56:24,444 INFO L85 PathProgramCache]: Analyzing trace with hash -593657459, now seen corresponding path program 94 times [2021-12-06 17:56:24,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:56:24,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472601492] [2021-12-06 17:56:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:56:24,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:56:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18488 backedges. 6162 proven. 12326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:56:26,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:56:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472601492] [2021-12-06 17:56:26,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472601492] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:56:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043902737] [2021-12-06 17:56:26,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:56:26,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:26,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:56:26,030 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:56:26,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-12-06 17:56:26,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:56:26,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:56:26,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 161 conjunts are in the unsatisfiable core [2021-12-06 17:56:26,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:56:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18488 backedges. 6320 proven. 12168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:56:26,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:56:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18488 backedges. 6320 proven. 12168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:56:27,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043902737] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:56:27,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:56:27,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 86 [2021-12-06 17:56:27,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181905182] [2021-12-06 17:56:27,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:56:27,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-06 17:56:27,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:56:27,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-06 17:56:27,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3412, Invalid=3898, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 17:56:27,067 INFO L87 Difference]: Start difference. First operand 483 states and 486 transitions. Second operand has 86 states, 86 states have (on average 5.872093023255814) internal successors, (505), 86 states have internal predecessors, (505), 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) [2021-12-06 17:56:28,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:56:28,348 INFO L93 Difference]: Finished difference Result 500 states and 504 transitions. [2021-12-06 17:56:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-12-06 17:56:28,348 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 5.872093023255814) internal successors, (505), 86 states have internal predecessors, (505), 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 482 [2021-12-06 17:56:28,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:56:28,349 INFO L225 Difference]: With dead ends: 500 [2021-12-06 17:56:28,349 INFO L226 Difference]: Without dead ends: 498 [2021-12-06 17:56:28,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1205 GetRequests, 1038 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7107 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=10382, Invalid=17674, Unknown=0, NotChecked=0, Total=28056 [2021-12-06 17:56:28,351 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 340 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:56:28,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 766 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:56:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-12-06 17:56:28,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 491. [2021-12-06 17:56:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.0081632653061225) internal successors, (494), 490 states have internal predecessors, (494), 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) [2021-12-06 17:56:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 494 transitions. [2021-12-06 17:56:28,407 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 494 transitions. Word has length 482 [2021-12-06 17:56:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:56:28,408 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 494 transitions. [2021-12-06 17:56:28,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 5.872093023255814) internal successors, (505), 86 states have internal predecessors, (505), 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) [2021-12-06 17:56:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 494 transitions. [2021-12-06 17:56:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2021-12-06 17:56:28,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:56:28,410 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 80, 80, 80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:56:28,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-12-06 17:56:28,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:28,611 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:56:28,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:56:28,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1089866125, now seen corresponding path program 95 times [2021-12-06 17:56:28,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:56:28,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163478498] [2021-12-06 17:56:28,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:56:28,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:56:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 19120 backedges. 12563 proven. 6557 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:56:32,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:56:32,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163478498] [2021-12-06 17:56:32,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163478498] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:56:32,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096561719] [2021-12-06 17:56:32,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:56:32,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:32,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:56:32,999 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:56:33,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-12-06 17:56:33,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 81 check-sat command(s) [2021-12-06 17:56:33,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:56:33,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 163 conjunts are in the unsatisfiable core [2021-12-06 17:56:33,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:56:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 19120 backedges. 12800 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:56:39,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:56:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 19120 backedges. 12800 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:56:39,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096561719] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:56:39,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:56:39,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163, 163] total 248 [2021-12-06 17:56:39,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287324097] [2021-12-06 17:56:39,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:56:39,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 248 states [2021-12-06 17:56:39,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:56:39,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 248 interpolants. [2021-12-06 17:56:39,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13780, Invalid=47476, Unknown=0, NotChecked=0, Total=61256 [2021-12-06 17:56:39,650 INFO L87 Difference]: Start difference. First operand 491 states and 494 transitions. Second operand has 248 states, 248 states have (on average 3.3346774193548385) internal successors, (827), 248 states have internal predecessors, (827), 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) [2021-12-06 17:56:47,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:56:47,706 INFO L93 Difference]: Finished difference Result 1465 states and 1632 transitions. [2021-12-06 17:56:47,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2021-12-06 17:56:47,706 INFO L78 Accepts]: Start accepts. Automaton has has 248 states, 248 states have (on average 3.3346774193548385) internal successors, (827), 248 states have internal predecessors, (827), 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 490 [2021-12-06 17:56:47,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:56:47,707 INFO L225 Difference]: With dead ends: 1465 [2021-12-06 17:56:47,707 INFO L226 Difference]: Without dead ends: 819 [2021-12-06 17:56:47,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1302 GetRequests, 895 SyntacticMatches, 0 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40231 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=40266, Invalid=126606, Unknown=0, NotChecked=0, Total=166872 [2021-12-06 17:56:47,714 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 1675 mSDsluCounter, 2213 mSDsCounter, 0 mSdLazyCounter, 2616 mSolverCounterSat, 872 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1675 SdHoareTripleChecker+Valid, 2378 SdHoareTripleChecker+Invalid, 3488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 872 IncrementalHoareTripleChecker+Valid, 2616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:56:47,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1675 Valid, 2378 Invalid, 3488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [872 Valid, 2616 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 17:56:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-12-06 17:56:47,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 495. [2021-12-06 17:56:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.008097165991903) internal successors, (498), 494 states have internal predecessors, (498), 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) [2021-12-06 17:56:47,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 498 transitions. [2021-12-06 17:56:47,772 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 498 transitions. Word has length 490 [2021-12-06 17:56:47,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:56:47,772 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 498 transitions. [2021-12-06 17:56:47,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 248 states, 248 states have (on average 3.3346774193548385) internal successors, (827), 248 states have internal predecessors, (827), 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) [2021-12-06 17:56:47,772 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 498 transitions. [2021-12-06 17:56:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2021-12-06 17:56:47,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:56:47,774 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 81, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:56:47,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-12-06 17:56:47,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-12-06 17:56:47,975 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:56:47,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:56:47,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2017253891, now seen corresponding path program 96 times [2021-12-06 17:56:47,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:56:47,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217422954] [2021-12-06 17:56:47,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:56:47,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:56:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19442 backedges. 6480 proven. 12962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:56:49,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:56:49,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217422954] [2021-12-06 17:56:49,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217422954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:56:49,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771843231] [2021-12-06 17:56:49,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:56:49,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:49,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:56:49,701 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:56:49,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-12-06 17:56:50,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2021-12-06 17:56:50,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:56:50,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 1819 conjuncts, 165 conjunts are in the unsatisfiable core [2021-12-06 17:56:50,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:56:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 19442 backedges. 6642 proven. 12800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:56:50,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:56:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 19442 backedges. 6642 proven. 12800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:56:51,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771843231] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:56:51,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:56:51,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 88 [2021-12-06 17:56:51,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518506150] [2021-12-06 17:56:51,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:56:51,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-06 17:56:51,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:56:51,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-06 17:56:51,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3579, Invalid=4077, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 17:56:51,237 INFO L87 Difference]: Start difference. First operand 495 states and 498 transitions. Second operand has 88 states, 88 states have (on average 5.875) internal successors, (517), 88 states have internal predecessors, (517), 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) [2021-12-06 17:56:52,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:56:52,735 INFO L93 Difference]: Finished difference Result 512 states and 516 transitions. [2021-12-06 17:56:52,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-12-06 17:56:52,735 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 5.875) internal successors, (517), 88 states have internal predecessors, (517), 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 494 [2021-12-06 17:56:52,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:56:52,736 INFO L225 Difference]: With dead ends: 512 [2021-12-06 17:56:52,736 INFO L226 Difference]: Without dead ends: 510 [2021-12-06 17:56:52,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1235 GetRequests, 1064 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7449 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=10887, Invalid=18525, Unknown=0, NotChecked=0, Total=29412 [2021-12-06 17:56:52,738 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 597 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:56:52,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 657 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:56:52,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-06 17:56:52,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 503. [2021-12-06 17:56:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.0079681274900398) internal successors, (506), 502 states have internal predecessors, (506), 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) [2021-12-06 17:56:52,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 506 transitions. [2021-12-06 17:56:52,796 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 506 transitions. Word has length 494 [2021-12-06 17:56:52,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:56:52,796 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 506 transitions. [2021-12-06 17:56:52,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 5.875) internal successors, (517), 88 states have internal predecessors, (517), 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) [2021-12-06 17:56:52,797 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 506 transitions. [2021-12-06 17:56:52,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-12-06 17:56:52,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:56:52,798 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 82, 82, 82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:56:52,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-12-06 17:56:52,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:52,999 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:56:53,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:56:53,000 INFO L85 PathProgramCache]: Analyzing trace with hash 708586211, now seen corresponding path program 97 times [2021-12-06 17:56:53,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:56:53,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061743575] [2021-12-06 17:56:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:56:53,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:56:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20090 backedges. 13205 proven. 6885 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:56:57,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:56:57,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061743575] [2021-12-06 17:56:57,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061743575] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:56:57,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975457595] [2021-12-06 17:56:57,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:56:57,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:57,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:56:57,821 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:56:57,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-12-06 17:56:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:57,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 166 conjunts are in the unsatisfiable core [2021-12-06 17:56:57,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:57:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20090 backedges. 13446 proven. 6642 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:57:04,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:57:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20090 backedges. 13446 proven. 6642 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:57:04,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975457595] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:57:04,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:57:04,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [167, 166, 166] total 251 [2021-12-06 17:57:04,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179662253] [2021-12-06 17:57:04,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:57:04,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 251 states [2021-12-06 17:57:04,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:04,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 251 interpolants. [2021-12-06 17:57:04,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14031, Invalid=48719, Unknown=0, NotChecked=0, Total=62750 [2021-12-06 17:57:04,673 INFO L87 Difference]: Start difference. First operand 503 states and 506 transitions. Second operand has 251 states, 251 states have (on average 3.3386454183266934) internal successors, (838), 251 states have internal predecessors, (838), 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) [2021-12-06 17:57:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:10,332 INFO L93 Difference]: Finished difference Result 1166 states and 1334 transitions. [2021-12-06 17:57:10,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-12-06 17:57:10,333 INFO L78 Accepts]: Start accepts. Automaton has has 251 states, 251 states have (on average 3.3386454183266934) internal successors, (838), 251 states have internal predecessors, (838), 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 502 [2021-12-06 17:57:10,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:10,334 INFO L225 Difference]: With dead ends: 1166 [2021-12-06 17:57:10,334 INFO L226 Difference]: Without dead ends: 833 [2021-12-06 17:57:10,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1251 GetRequests, 920 SyntacticMatches, 0 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24382 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=27645, Invalid=82911, Unknown=0, NotChecked=0, Total=110556 [2021-12-06 17:57:10,339 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 1844 mSDsluCounter, 2528 mSDsCounter, 0 mSdLazyCounter, 2931 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1844 SdHoareTripleChecker+Valid, 2697 SdHoareTripleChecker+Invalid, 3584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 2931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:10,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1844 Valid, 2697 Invalid, 3584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 2931 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 17:57:10,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-12-06 17:57:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 505. [2021-12-06 17:57:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.007936507936508) internal successors, (508), 504 states have internal predecessors, (508), 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) [2021-12-06 17:57:10,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 508 transitions. [2021-12-06 17:57:10,403 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 508 transitions. Word has length 502 [2021-12-06 17:57:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:10,403 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 508 transitions. [2021-12-06 17:57:10,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 251 states, 251 states have (on average 3.3386454183266934) internal successors, (838), 251 states have internal predecessors, (838), 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) [2021-12-06 17:57:10,403 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 508 transitions. [2021-12-06 17:57:10,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2021-12-06 17:57:10,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:10,405 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:57:10,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-12-06 17:57:10,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-12-06 17:57:10,606 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:10,607 INFO L85 PathProgramCache]: Analyzing trace with hash -643705400, now seen corresponding path program 98 times [2021-12-06 17:57:10,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:10,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002014920] [2021-12-06 17:57:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:10,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 20254 backedges. 13205 proven. 7049 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:15,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:15,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002014920] [2021-12-06 17:57:15,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002014920] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:57:15,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002776629] [2021-12-06 17:57:15,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:57:15,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:57:15,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:57:15,214 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:57:15,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-12-06 17:57:15,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:57:15,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:57:15,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 168 conjunts are in the unsatisfiable core [2021-12-06 17:57:15,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:57:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20254 backedges. 6806 proven. 13448 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:20,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:57:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20254 backedges. 6806 proven. 13448 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:20,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002776629] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:57:20,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:57:20,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [168, 86, 86] total 252 [2021-12-06 17:57:20,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958690930] [2021-12-06 17:57:20,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:57:20,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 252 states [2021-12-06 17:57:20,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:20,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 252 interpolants. [2021-12-06 17:57:20,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10628, Invalid=52624, Unknown=0, NotChecked=0, Total=63252 [2021-12-06 17:57:20,607 INFO L87 Difference]: Start difference. First operand 505 states and 508 transitions. Second operand has 252 states, 252 states have (on average 3.992063492063492) internal successors, (1006), 252 states have internal predecessors, (1006), 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) [2021-12-06 17:57:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:32,411 INFO L93 Difference]: Finished difference Result 1181 states and 1352 transitions. [2021-12-06 17:57:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 337 states. [2021-12-06 17:57:32,412 INFO L78 Accepts]: Start accepts. Automaton has has 252 states, 252 states have (on average 3.992063492063492) internal successors, (1006), 252 states have internal predecessors, (1006), 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 504 [2021-12-06 17:57:32,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:32,413 INFO L225 Difference]: With dead ends: 1181 [2021-12-06 17:57:32,413 INFO L226 Difference]: Without dead ends: 846 [2021-12-06 17:57:32,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1589 GetRequests, 1006 SyntacticMatches, 1 SemanticMatches, 582 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118856 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=53126, Invalid=287346, Unknown=0, NotChecked=0, Total=340472 [2021-12-06 17:57:32,426 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 2458 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 5710 mSolverCounterSat, 1831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2458 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 7541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1831 IncrementalHoareTripleChecker+Valid, 5710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:32,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2458 Valid, 1361 Invalid, 7541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1831 Valid, 5710 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 17:57:32,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-12-06 17:57:32,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 511. [2021-12-06 17:57:32,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.007843137254902) internal successors, (514), 510 states have internal predecessors, (514), 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) [2021-12-06 17:57:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 514 transitions. [2021-12-06 17:57:32,503 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 514 transitions. Word has length 504 [2021-12-06 17:57:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:32,503 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 514 transitions. [2021-12-06 17:57:32,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 252 states, 252 states have (on average 3.992063492063492) internal successors, (1006), 252 states have internal predecessors, (1006), 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) [2021-12-06 17:57:32,504 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 514 transitions. [2021-12-06 17:57:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2021-12-06 17:57:32,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:32,505 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:57:32,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-12-06 17:57:32,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-12-06 17:57:32,707 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:32,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:32,708 INFO L85 PathProgramCache]: Analyzing trace with hash -207876448, now seen corresponding path program 99 times [2021-12-06 17:57:32,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:32,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944473027] [2021-12-06 17:57:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:32,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20750 backedges. 13532 proven. 7218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:37,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:37,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944473027] [2021-12-06 17:57:37,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944473027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:57:37,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793896371] [2021-12-06 17:57:37,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:57:37,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:57:37,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:57:37,428 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:57:37,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-12-06 17:57:37,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2021-12-06 17:57:37,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:57:37,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 170 conjunts are in the unsatisfiable core [2021-12-06 17:57:37,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:57:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20750 backedges. 6972 proven. 13778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:42,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:57:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20750 backedges. 6972 proven. 13778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:43,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793896371] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:57:43,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:57:43,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [170, 87, 87] total 255 [2021-12-06 17:57:43,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142308989] [2021-12-06 17:57:43,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:57:43,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 255 states [2021-12-06 17:57:43,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:43,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 255 interpolants. [2021-12-06 17:57:43,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10882, Invalid=53888, Unknown=0, NotChecked=0, Total=64770 [2021-12-06 17:57:43,231 INFO L87 Difference]: Start difference. First operand 511 states and 514 transitions. Second operand has 255 states, 255 states have (on average 3.992156862745098) internal successors, (1018), 255 states have internal predecessors, (1018), 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) [2021-12-06 17:57:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:55,937 INFO L93 Difference]: Finished difference Result 1195 states and 1368 transitions. [2021-12-06 17:57:55,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 341 states. [2021-12-06 17:57:55,937 INFO L78 Accepts]: Start accepts. Automaton has has 255 states, 255 states have (on average 3.992156862745098) internal successors, (1018), 255 states have internal predecessors, (1018), 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 510 [2021-12-06 17:57:55,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:55,938 INFO L225 Difference]: With dead ends: 1195 [2021-12-06 17:57:55,938 INFO L226 Difference]: Without dead ends: 856 [2021-12-06 17:57:55,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1608 GetRequests, 1018 SyntacticMatches, 1 SemanticMatches, 589 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121758 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=54396, Invalid=294294, Unknown=0, NotChecked=0, Total=348690 [2021-12-06 17:57:55,953 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 2517 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 6336 mSolverCounterSat, 2039 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2517 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 8375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2039 IncrementalHoareTripleChecker+Valid, 6336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:55,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2517 Valid, 1530 Invalid, 8375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2039 Valid, 6336 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 17:57:55,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-12-06 17:57:56,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 517. [2021-12-06 17:57:56,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.0077519379844961) internal successors, (520), 516 states have internal predecessors, (520), 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) [2021-12-06 17:57:56,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 520 transitions. [2021-12-06 17:57:56,070 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 520 transitions. Word has length 510 [2021-12-06 17:57:56,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:56,071 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 520 transitions. [2021-12-06 17:57:56,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 255 states, 255 states have (on average 3.992156862745098) internal successors, (1018), 255 states have internal predecessors, (1018), 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) [2021-12-06 17:57:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 520 transitions. [2021-12-06 17:57:56,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-12-06 17:57:56,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:56,073 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:57:56,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-12-06 17:57:56,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-12-06 17:57:56,273 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:56,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1172804680, now seen corresponding path program 100 times [2021-12-06 17:57:56,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:56,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766859661] [2021-12-06 17:57:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:56,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 21252 backedges. 13863 proven. 7389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:01,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:01,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766859661] [2021-12-06 17:58:01,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766859661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:58:01,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382241419] [2021-12-06 17:58:01,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:58:01,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:01,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:01,283 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:58:01,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-12-06 17:58:01,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:58:01,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:58:01,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 172 conjunts are in the unsatisfiable core [2021-12-06 17:58:01,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 21252 backedges. 14112 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:07,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21252 backedges. 14112 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:08,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382241419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:08,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:58:08,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [172, 172, 172] total 259 [2021-12-06 17:58:08,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9557036] [2021-12-06 17:58:08,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:08,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 259 states [2021-12-06 17:58:08,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:08,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 259 interpolants. [2021-12-06 17:58:08,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14967, Invalid=51855, Unknown=0, NotChecked=0, Total=66822 [2021-12-06 17:58:08,290 INFO L87 Difference]: Start difference. First operand 517 states and 520 transitions. Second operand has 259 states, 259 states have (on average 3.3204633204633205) internal successors, (860), 259 states have internal predecessors, (860), 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) [2021-12-06 17:58:14,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:14,360 INFO L93 Difference]: Finished difference Result 1202 states and 1376 transitions. [2021-12-06 17:58:14,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-12-06 17:58:14,360 INFO L78 Accepts]: Start accepts. Automaton has has 259 states, 259 states have (on average 3.3204633204633205) internal successors, (860), 259 states have internal predecessors, (860), 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 516 [2021-12-06 17:58:14,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:14,361 INFO L225 Difference]: With dead ends: 1202 [2021-12-06 17:58:14,361 INFO L226 Difference]: Without dead ends: 859 [2021-12-06 17:58:14,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1287 GetRequests, 945 SyntacticMatches, 0 SemanticMatches, 342 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25912 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=29589, Invalid=88403, Unknown=0, NotChecked=0, Total=117992 [2021-12-06 17:58:14,366 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 1465 mSDsluCounter, 1899 mSDsCounter, 0 mSdLazyCounter, 2306 mSolverCounterSat, 821 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1465 SdHoareTripleChecker+Valid, 2074 SdHoareTripleChecker+Invalid, 3127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 2306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:14,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1465 Valid, 2074 Invalid, 3127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [821 Valid, 2306 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 17:58:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-12-06 17:58:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 519. [2021-12-06 17:58:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.0077220077220077) internal successors, (522), 518 states have internal predecessors, (522), 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) [2021-12-06 17:58:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 522 transitions. [2021-12-06 17:58:14,430 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 522 transitions. Word has length 516 [2021-12-06 17:58:14,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:14,431 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 522 transitions. [2021-12-06 17:58:14,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 259 states, 259 states have (on average 3.3204633204633205) internal successors, (860), 259 states have internal predecessors, (860), 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) [2021-12-06 17:58:14,431 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 522 transitions. [2021-12-06 17:58:14,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2021-12-06 17:58:14,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:14,433 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 85, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:14,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-12-06 17:58:14,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-12-06 17:58:14,634 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:14,635 INFO L85 PathProgramCache]: Analyzing trace with hash 714252765, now seen corresponding path program 101 times [2021-12-06 17:58:14,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:14,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281281277] [2021-12-06 17:58:14,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:14,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21422 backedges. 7140 proven. 14282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:16,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:16,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281281277] [2021-12-06 17:58:16,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281281277] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:58:16,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662135262] [2021-12-06 17:58:16,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:58:16,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:16,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:16,547 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:58:16,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-12-06 17:58:17,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 86 check-sat command(s) [2021-12-06 17:58:17,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:58:17,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1907 conjuncts, 173 conjunts are in the unsatisfiable core [2021-12-06 17:58:17,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 21422 backedges. 7310 proven. 14112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:17,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21422 backedges. 7310 proven. 14112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:18,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662135262] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:18,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:58:18,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 92 [2021-12-06 17:58:18,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290551538] [2021-12-06 17:58:18,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:18,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-06 17:58:18,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:18,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-06 17:58:18,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3925, Invalid=4447, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 17:58:18,076 INFO L87 Difference]: Start difference. First operand 519 states and 522 transitions. Second operand has 92 states, 92 states have (on average 5.880434782608695) internal successors, (541), 92 states have internal predecessors, (541), 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) [2021-12-06 17:58:19,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:19,562 INFO L93 Difference]: Finished difference Result 536 states and 540 transitions. [2021-12-06 17:58:19,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-12-06 17:58:19,562 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 5.880434782608695) internal successors, (541), 92 states have internal predecessors, (541), 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 518 [2021-12-06 17:58:19,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:19,563 INFO L225 Difference]: With dead ends: 536 [2021-12-06 17:58:19,563 INFO L226 Difference]: Without dead ends: 534 [2021-12-06 17:58:19,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1295 GetRequests, 1116 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8157 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=11933, Invalid=20287, Unknown=0, NotChecked=0, Total=32220 [2021-12-06 17:58:19,565 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 540 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:19,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 681 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:58:19,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-12-06 17:58:19,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 527. [2021-12-06 17:58:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.0076045627376427) internal successors, (530), 526 states have internal predecessors, (530), 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) [2021-12-06 17:58:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 530 transitions. [2021-12-06 17:58:19,634 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 530 transitions. Word has length 518 [2021-12-06 17:58:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:19,634 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 530 transitions. [2021-12-06 17:58:19,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 5.880434782608695) internal successors, (541), 92 states have internal predecessors, (541), 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) [2021-12-06 17:58:19,635 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 530 transitions. [2021-12-06 17:58:19,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2021-12-06 17:58:19,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:19,636 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 86, 86, 86, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:19,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-12-06 17:58:19,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-12-06 17:58:19,837 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:19,838 INFO L85 PathProgramCache]: Analyzing trace with hash 725731011, now seen corresponding path program 102 times [2021-12-06 17:58:19,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:19,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972220682] [2021-12-06 17:58:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:19,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 22102 backedges. 14537 proven. 7565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:24,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:24,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972220682] [2021-12-06 17:58:24,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972220682] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:58:24,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115102829] [2021-12-06 17:58:24,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:58:24,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:24,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:24,751 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:58:24,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-12-06 17:58:25,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2021-12-06 17:58:25,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:58:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 1931 conjuncts, 175 conjunts are in the unsatisfiable core [2021-12-06 17:58:25,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 22102 backedges. 14792 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:31,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 22102 backedges. 14792 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:32,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115102829] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:32,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:58:32,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [175, 175, 175] total 266 [2021-12-06 17:58:32,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733938296] [2021-12-06 17:58:32,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:32,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 266 states [2021-12-06 17:58:32,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:32,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 266 interpolants. [2021-12-06 17:58:32,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15844, Invalid=54646, Unknown=0, NotChecked=0, Total=70490 [2021-12-06 17:58:32,285 INFO L87 Difference]: Start difference. First operand 527 states and 530 transitions. Second operand has 266 states, 266 states have (on average 3.3345864661654137) internal successors, (887), 266 states have internal predecessors, (887), 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) [2021-12-06 17:58:42,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:42,447 INFO L93 Difference]: Finished difference Result 1573 states and 1752 transitions. [2021-12-06 17:58:42,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2021-12-06 17:58:42,448 INFO L78 Accepts]: Start accepts. Automaton has has 266 states, 266 states have (on average 3.3345864661654137) internal successors, (887), 266 states have internal predecessors, (887), 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 526 [2021-12-06 17:58:42,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:42,449 INFO L225 Difference]: With dead ends: 1573 [2021-12-06 17:58:42,449 INFO L226 Difference]: Without dead ends: 879 [2021-12-06 17:58:42,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1398 GetRequests, 961 SyntacticMatches, 0 SemanticMatches, 437 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46345 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=46380, Invalid=145902, Unknown=0, NotChecked=0, Total=192282 [2021-12-06 17:58:42,459 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 1980 mSDsluCounter, 2868 mSDsCounter, 0 mSdLazyCounter, 3305 mSolverCounterSat, 1070 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1980 SdHoareTripleChecker+Valid, 3045 SdHoareTripleChecker+Invalid, 4375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1070 IncrementalHoareTripleChecker+Valid, 3305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:42,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1980 Valid, 3045 Invalid, 4375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1070 Valid, 3305 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 17:58:42,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-12-06 17:58:42,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 531. [2021-12-06 17:58:42,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.0075471698113208) internal successors, (534), 530 states have internal predecessors, (534), 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) [2021-12-06 17:58:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 534 transitions. [2021-12-06 17:58:42,548 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 534 transitions. Word has length 526 [2021-12-06 17:58:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:42,548 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 534 transitions. [2021-12-06 17:58:42,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 266 states, 266 states have (on average 3.3345864661654137) internal successors, (887), 266 states have internal predecessors, (887), 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) [2021-12-06 17:58:42,549 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 534 transitions. [2021-12-06 17:58:42,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2021-12-06 17:58:42,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:42,552 INFO L514 BasicCegarLoop]: trace histogram [88, 87, 87, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:42,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-12-06 17:58:42,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:42,753 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:42,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:42,754 INFO L85 PathProgramCache]: Analyzing trace with hash 868710733, now seen corresponding path program 103 times [2021-12-06 17:58:42,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:42,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18618335] [2021-12-06 17:58:42,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:42,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 22448 backedges. 7482 proven. 14966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:44,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:44,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18618335] [2021-12-06 17:58:44,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18618335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:58:44,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944736103] [2021-12-06 17:58:44,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:58:44,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:44,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:44,733 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:58:44,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-12-06 17:58:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:44,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 1951 conjuncts, 177 conjunts are in the unsatisfiable core [2021-12-06 17:58:44,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 22448 backedges. 7656 proven. 14792 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:45,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 22448 backedges. 7656 proven. 14792 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:45,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944736103] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:45,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:58:45,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 94 [2021-12-06 17:58:45,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325883734] [2021-12-06 17:58:45,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:45,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-06 17:58:45,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:45,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-06 17:58:45,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4104, Invalid=4638, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 17:58:45,835 INFO L87 Difference]: Start difference. First operand 531 states and 534 transitions. Second operand has 94 states, 94 states have (on average 5.882978723404255) internal successors, (553), 94 states have internal predecessors, (553), 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) [2021-12-06 17:58:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:47,427 INFO L93 Difference]: Finished difference Result 548 states and 552 transitions. [2021-12-06 17:58:47,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2021-12-06 17:58:47,427 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 5.882978723404255) internal successors, (553), 94 states have internal predecessors, (553), 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 530 [2021-12-06 17:58:47,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:47,428 INFO L225 Difference]: With dead ends: 548 [2021-12-06 17:58:47,428 INFO L226 Difference]: Without dead ends: 546 [2021-12-06 17:58:47,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1325 GetRequests, 1142 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8523 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=12474, Invalid=21198, Unknown=0, NotChecked=0, Total=33672 [2021-12-06 17:58:47,430 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 633 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:47,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 888 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:58:47,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-12-06 17:58:47,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 539. [2021-12-06 17:58:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.0074349442379182) internal successors, (542), 538 states have internal predecessors, (542), 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) [2021-12-06 17:58:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 542 transitions. [2021-12-06 17:58:47,519 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 542 transitions. Word has length 530 [2021-12-06 17:58:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:47,519 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 542 transitions. [2021-12-06 17:58:47,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 5.882978723404255) internal successors, (553), 94 states have internal predecessors, (553), 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) [2021-12-06 17:58:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 542 transitions. [2021-12-06 17:58:47,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2021-12-06 17:58:47,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:47,521 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 88, 88, 88, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:47,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-12-06 17:58:47,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-12-06 17:58:47,722 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:47,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:47,723 INFO L85 PathProgramCache]: Analyzing trace with hash 396373555, now seen corresponding path program 104 times [2021-12-06 17:58:47,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:47,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174366764] [2021-12-06 17:58:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:47,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 23144 backedges. 15227 proven. 7917 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:52,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:52,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174366764] [2021-12-06 17:58:52,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174366764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:58:52,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469151982] [2021-12-06 17:58:52,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:58:52,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:52,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:52,922 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:58:52,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-12-06 17:58:53,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:58:53,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:58:53,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 178 conjunts are in the unsatisfiable core [2021-12-06 17:58:53,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 23144 backedges. 15486 proven. 7656 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:59:00,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 23144 backedges. 15486 proven. 7656 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:59:00,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469151982] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:00,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:59:00,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [179, 178, 178] total 269 [2021-12-06 17:59:00,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986104845] [2021-12-06 17:59:00,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:00,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 269 states [2021-12-06 17:59:00,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:00,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 269 interpolants. [2021-12-06 17:59:00,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16113, Invalid=55979, Unknown=0, NotChecked=0, Total=72092 [2021-12-06 17:59:00,541 INFO L87 Difference]: Start difference. First operand 539 states and 542 transitions. Second operand has 269 states, 269 states have (on average 3.3382899628252787) internal successors, (898), 269 states have internal predecessors, (898), 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) [2021-12-06 17:59:07,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:07,339 INFO L93 Difference]: Finished difference Result 1250 states and 1430 transitions. [2021-12-06 17:59:07,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-12-06 17:59:07,339 INFO L78 Accepts]: Start accepts. Automaton has has 269 states, 269 states have (on average 3.3382899628252787) internal successors, (898), 269 states have internal predecessors, (898), 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 538 [2021-12-06 17:59:07,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:07,341 INFO L225 Difference]: With dead ends: 1250 [2021-12-06 17:59:07,341 INFO L226 Difference]: Without dead ends: 893 [2021-12-06 17:59:07,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1341 GetRequests, 986 SyntacticMatches, 0 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28015 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=31779, Invalid=95313, Unknown=0, NotChecked=0, Total=127092 [2021-12-06 17:59:07,346 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 1579 mSDsluCounter, 1894 mSDsCounter, 0 mSdLazyCounter, 2327 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1579 SdHoareTripleChecker+Valid, 2075 SdHoareTripleChecker+Invalid, 3370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 2327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:07,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1579 Valid, 2075 Invalid, 3370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1043 Valid, 2327 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 17:59:07,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-12-06 17:59:07,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 541. [2021-12-06 17:59:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.0074074074074073) internal successors, (544), 540 states have internal predecessors, (544), 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) [2021-12-06 17:59:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 544 transitions. [2021-12-06 17:59:07,416 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 544 transitions. Word has length 538 [2021-12-06 17:59:07,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:07,416 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 544 transitions. [2021-12-06 17:59:07,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 269 states, 269 states have (on average 3.3382899628252787) internal successors, (898), 269 states have internal predecessors, (898), 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) [2021-12-06 17:59:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 544 transitions. [2021-12-06 17:59:07,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2021-12-06 17:59:07,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:07,418 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:07,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-12-06 17:59:07,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:07,619 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:07,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:07,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1072100712, now seen corresponding path program 105 times [2021-12-06 17:59:07,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:07,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505887594] [2021-12-06 17:59:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:07,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 23320 backedges. 15227 proven. 8093 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:12,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:12,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505887594] [2021-12-06 17:59:12,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505887594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:59:12,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915904857] [2021-12-06 17:59:12,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:59:12,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:12,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:12,711 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:12,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-12-06 17:59:13,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 89 check-sat command(s) [2021-12-06 17:59:13,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:59:13,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 1985 conjuncts, 180 conjunts are in the unsatisfiable core [2021-12-06 17:59:13,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 23320 backedges. 15488 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:20,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 23320 backedges. 15488 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:20,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915904857] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:20,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:59:20,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [180, 180, 180] total 271 [2021-12-06 17:59:20,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242380107] [2021-12-06 17:59:20,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:20,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 271 states [2021-12-06 17:59:20,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:20,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 271 interpolants. [2021-12-06 17:59:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16383, Invalid=56787, Unknown=0, NotChecked=0, Total=73170 [2021-12-06 17:59:20,522 INFO L87 Difference]: Start difference. First operand 541 states and 544 transitions. Second operand has 271 states, 271 states have (on average 3.321033210332103) internal successors, (900), 271 states have internal predecessors, (900), 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) [2021-12-06 17:59:27,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:27,594 INFO L93 Difference]: Finished difference Result 1258 states and 1440 transitions. [2021-12-06 17:59:27,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2021-12-06 17:59:27,595 INFO L78 Accepts]: Start accepts. Automaton has has 271 states, 271 states have (on average 3.321033210332103) internal successors, (900), 271 states have internal predecessors, (900), 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 540 [2021-12-06 17:59:27,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:27,596 INFO L225 Difference]: With dead ends: 1258 [2021-12-06 17:59:27,596 INFO L226 Difference]: Without dead ends: 899 [2021-12-06 17:59:27,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1347 GetRequests, 989 SyntacticMatches, 0 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28378 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=32405, Invalid=96835, Unknown=0, NotChecked=0, Total=129240 [2021-12-06 17:59:27,602 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 1534 mSDsluCounter, 2509 mSDsCounter, 0 mSdLazyCounter, 2939 mSolverCounterSat, 770 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 2692 SdHoareTripleChecker+Invalid, 3709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 770 IncrementalHoareTripleChecker+Valid, 2939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:27,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1534 Valid, 2692 Invalid, 3709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [770 Valid, 2939 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 17:59:27,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-12-06 17:59:27,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 543. [2021-12-06 17:59:27,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 1.007380073800738) internal successors, (546), 542 states have internal predecessors, (546), 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) [2021-12-06 17:59:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 546 transitions. [2021-12-06 17:59:27,672 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 546 transitions. Word has length 540 [2021-12-06 17:59:27,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:27,672 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 546 transitions. [2021-12-06 17:59:27,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 271 states, 271 states have (on average 3.321033210332103) internal successors, (900), 271 states have internal predecessors, (900), 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) [2021-12-06 17:59:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 546 transitions. [2021-12-06 17:59:27,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-12-06 17:59:27,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:27,674 INFO L514 BasicCegarLoop]: trace histogram [90, 89, 89, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:27,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-12-06 17:59:27,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-12-06 17:59:27,875 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:27,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:27,876 INFO L85 PathProgramCache]: Analyzing trace with hash 768369085, now seen corresponding path program 106 times [2021-12-06 17:59:27,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:27,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489411896] [2021-12-06 17:59:27,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:27,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 23498 backedges. 7832 proven. 15666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:29,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:29,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489411896] [2021-12-06 17:59:29,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489411896] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:59:29,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942840546] [2021-12-06 17:59:29,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:59:29,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:29,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:29,942 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:29,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-12-06 17:59:30,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:59:30,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:59:30,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1995 conjuncts, 181 conjunts are in the unsatisfiable core [2021-12-06 17:59:30,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 23498 backedges. 8010 proven. 15488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:30,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 23498 backedges. 8010 proven. 15488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:31,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942840546] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:31,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:59:31,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 96 [2021-12-06 17:59:31,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516681601] [2021-12-06 17:59:31,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:31,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-06 17:59:31,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:31,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-06 17:59:31,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4287, Invalid=4833, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 17:59:31,178 INFO L87 Difference]: Start difference. First operand 543 states and 546 transitions. Second operand has 96 states, 96 states have (on average 5.885416666666667) internal successors, (565), 96 states have internal predecessors, (565), 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) [2021-12-06 17:59:32,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:32,823 INFO L93 Difference]: Finished difference Result 560 states and 564 transitions. [2021-12-06 17:59:32,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-12-06 17:59:32,824 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 5.885416666666667) internal successors, (565), 96 states have internal predecessors, (565), 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 542 [2021-12-06 17:59:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:32,825 INFO L225 Difference]: With dead ends: 560 [2021-12-06 17:59:32,825 INFO L226 Difference]: Without dead ends: 558 [2021-12-06 17:59:32,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1355 GetRequests, 1168 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8897 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=13027, Invalid=22129, Unknown=0, NotChecked=0, Total=35156 [2021-12-06 17:59:32,826 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 380 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:32,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 924 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:59:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-12-06 17:59:32,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 551. [2021-12-06 17:59:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 1.0072727272727273) internal successors, (554), 550 states have internal predecessors, (554), 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) [2021-12-06 17:59:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 554 transitions. [2021-12-06 17:59:32,897 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 554 transitions. Word has length 542 [2021-12-06 17:59:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:32,897 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 554 transitions. [2021-12-06 17:59:32,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 5.885416666666667) internal successors, (565), 96 states have internal predecessors, (565), 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) [2021-12-06 17:59:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 554 transitions. [2021-12-06 17:59:32,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2021-12-06 17:59:32,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:32,899 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 90, 90, 90, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:32,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-12-06 17:59:33,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:33,100 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:33,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:33,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1339185501, now seen corresponding path program 107 times [2021-12-06 17:59:33,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:33,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389165619] [2021-12-06 17:59:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:33,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 24210 backedges. 15933 proven. 8277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:38,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:38,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389165619] [2021-12-06 17:59:38,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389165619] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:59:38,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121038145] [2021-12-06 17:59:38,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:59:38,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:38,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:38,489 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:38,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-12-06 17:59:39,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2021-12-06 17:59:39,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:59:39,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 2019 conjuncts, 183 conjunts are in the unsatisfiable core [2021-12-06 17:59:39,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 24210 backedges. 16200 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:46,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24210 backedges. 16200 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:46,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121038145] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:46,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:59:46,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [183, 183, 183] total 278 [2021-12-06 17:59:46,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833152156] [2021-12-06 17:59:46,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:46,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2021-12-06 17:59:46,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:46,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2021-12-06 17:59:46,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17300, Invalid=59706, Unknown=0, NotChecked=0, Total=77006 [2021-12-06 17:59:46,841 INFO L87 Difference]: Start difference. First operand 551 states and 554 transitions. Second operand has 278 states, 278 states have (on average 3.3345323741007196) internal successors, (927), 278 states have internal predecessors, (927), 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) [2021-12-06 17:59:58,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:58,098 INFO L93 Difference]: Finished difference Result 1645 states and 1832 transitions. [2021-12-06 17:59:58,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2021-12-06 17:59:58,098 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 3.3345323741007196) internal successors, (927), 278 states have internal predecessors, (927), 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 550 [2021-12-06 17:59:58,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:58,099 INFO L225 Difference]: With dead ends: 1645 [2021-12-06 17:59:58,099 INFO L226 Difference]: Without dead ends: 919 [2021-12-06 17:59:58,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1462 GetRequests, 1005 SyntacticMatches, 0 SemanticMatches, 457 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50661 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=50696, Invalid=159526, Unknown=0, NotChecked=0, Total=210222 [2021-12-06 17:59:58,107 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 1888 mSDsluCounter, 2907 mSDsCounter, 0 mSdLazyCounter, 3367 mSolverCounterSat, 982 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1888 SdHoareTripleChecker+Valid, 3092 SdHoareTripleChecker+Invalid, 4349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 982 IncrementalHoareTripleChecker+Valid, 3367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:58,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1888 Valid, 3092 Invalid, 4349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [982 Valid, 3367 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 17:59:58,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-12-06 17:59:58,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 555. [2021-12-06 17:59:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.0072202166064983) internal successors, (558), 554 states have internal predecessors, (558), 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) [2021-12-06 17:59:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 558 transitions. [2021-12-06 17:59:58,182 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 558 transitions. Word has length 550 [2021-12-06 17:59:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:58,182 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 558 transitions. [2021-12-06 17:59:58,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 3.3345323741007196) internal successors, (927), 278 states have internal predecessors, (927), 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) [2021-12-06 17:59:58,183 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 558 transitions. [2021-12-06 17:59:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2021-12-06 17:59:58,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:58,184 INFO L514 BasicCegarLoop]: trace histogram [92, 91, 91, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:58,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-12-06 17:59:58,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:58,386 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:58,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1857627347, now seen corresponding path program 108 times [2021-12-06 17:59:58,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:58,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756715870] [2021-12-06 17:59:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:58,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 24572 backedges. 8190 proven. 16382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:00,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:00,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756715870] [2021-12-06 18:00:00,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756715870] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:00:00,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028565750] [2021-12-06 18:00:00,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:00:00,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:00,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:00,607 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:00:00,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-12-06 18:00:01,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2021-12-06 18:00:01,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:00:01,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 2039 conjuncts, 185 conjunts are in the unsatisfiable core [2021-12-06 18:00:01,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:00:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 24572 backedges. 8372 proven. 16200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:01,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:00:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 24572 backedges. 8372 proven. 16200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:02,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028565750] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:00:02,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:00:02,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 98 [2021-12-06 18:00:02,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566249043] [2021-12-06 18:00:02,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:00:02,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-06 18:00:02,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:02,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-06 18:00:02,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4474, Invalid=5032, Unknown=0, NotChecked=0, Total=9506 [2021-12-06 18:00:02,389 INFO L87 Difference]: Start difference. First operand 555 states and 558 transitions. Second operand has 98 states, 98 states have (on average 5.887755102040816) internal successors, (577), 98 states have internal predecessors, (577), 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) [2021-12-06 18:00:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:04,183 INFO L93 Difference]: Finished difference Result 572 states and 576 transitions. [2021-12-06 18:00:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-12-06 18:00:04,183 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.887755102040816) internal successors, (577), 98 states have internal predecessors, (577), 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 554 [2021-12-06 18:00:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:04,184 INFO L225 Difference]: With dead ends: 572 [2021-12-06 18:00:04,184 INFO L226 Difference]: Without dead ends: 570 [2021-12-06 18:00:04,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1385 GetRequests, 1194 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9279 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=13592, Invalid=23080, Unknown=0, NotChecked=0, Total=36672 [2021-12-06 18:00:04,185 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 568 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:04,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 934 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:00:04,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-12-06 18:00:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 563. [2021-12-06 18:00:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.00711743772242) internal successors, (566), 562 states have internal predecessors, (566), 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) [2021-12-06 18:00:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 566 transitions. [2021-12-06 18:00:04,258 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 566 transitions. Word has length 554 [2021-12-06 18:00:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:04,259 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 566 transitions. [2021-12-06 18:00:04,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.887755102040816) internal successors, (577), 98 states have internal predecessors, (577), 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) [2021-12-06 18:00:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 566 transitions. [2021-12-06 18:00:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2021-12-06 18:00:04,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:04,261 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 92, 92, 92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:04,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-12-06 18:00:04,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:04,462 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:04,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:04,463 INFO L85 PathProgramCache]: Analyzing trace with hash 806334483, now seen corresponding path program 109 times [2021-12-06 18:00:04,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:04,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478650751] [2021-12-06 18:00:04,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:04,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 25300 backedges. 16655 proven. 8645 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:10,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:10,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478650751] [2021-12-06 18:00:10,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478650751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:00:10,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617889264] [2021-12-06 18:00:10,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:00:10,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:10,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:10,049 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:00:10,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-12-06 18:00:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:10,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 2063 conjuncts, 186 conjunts are in the unsatisfiable core [2021-12-06 18:00:10,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:00:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25300 backedges. 16926 proven. 8372 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:00:17,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:00:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 25300 backedges. 16926 proven. 8372 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:00:18,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617889264] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:00:18,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:00:18,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [187, 186, 186] total 281 [2021-12-06 18:00:18,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026404104] [2021-12-06 18:00:18,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:00:18,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 281 states [2021-12-06 18:00:18,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:18,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 281 interpolants. [2021-12-06 18:00:18,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17581, Invalid=61099, Unknown=0, NotChecked=0, Total=78680 [2021-12-06 18:00:18,116 INFO L87 Difference]: Start difference. First operand 563 states and 566 transitions. Second operand has 281 states, 281 states have (on average 3.3380782918149468) internal successors, (938), 281 states have internal predecessors, (938), 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) [2021-12-06 18:00:25,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:25,801 INFO L93 Difference]: Finished difference Result 1306 states and 1494 transitions. [2021-12-06 18:00:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-12-06 18:00:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 281 states, 281 states have (on average 3.3380782918149468) internal successors, (938), 281 states have internal predecessors, (938), 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 562 [2021-12-06 18:00:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:25,803 INFO L225 Difference]: With dead ends: 1306 [2021-12-06 18:00:25,803 INFO L226 Difference]: Without dead ends: 933 [2021-12-06 18:00:25,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1401 GetRequests, 1030 SyntacticMatches, 0 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30577 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=34695, Invalid=104061, Unknown=0, NotChecked=0, Total=138756 [2021-12-06 18:00:25,808 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 1934 mSDsluCounter, 2354 mSDsCounter, 0 mSdLazyCounter, 2817 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1934 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 3791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 2817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:25,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1934 Valid, 2543 Invalid, 3791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 2817 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 18:00:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-12-06 18:00:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 565. [2021-12-06 18:00:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.0070921985815602) internal successors, (568), 564 states have internal predecessors, (568), 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) [2021-12-06 18:00:25,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 568 transitions. [2021-12-06 18:00:25,889 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 568 transitions. Word has length 562 [2021-12-06 18:00:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:25,889 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 568 transitions. [2021-12-06 18:00:25,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 281 states, 281 states have (on average 3.3380782918149468) internal successors, (938), 281 states have internal predecessors, (938), 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) [2021-12-06 18:00:25,890 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 568 transitions. [2021-12-06 18:00:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2021-12-06 18:00:25,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:25,893 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:25,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-12-06 18:00:26,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-12-06 18:00:26,093 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:26,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1715278472, now seen corresponding path program 110 times [2021-12-06 18:00:26,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:26,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059063871] [2021-12-06 18:00:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:26,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25484 backedges. 16655 proven. 8829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:31,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:31,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059063871] [2021-12-06 18:00:31,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059063871] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:00:31,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613833979] [2021-12-06 18:00:31,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:00:31,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:31,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:31,810 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:00:31,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0875f6d7-c64d-47ce-9b0d-505ec06f780a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-12-06 18:00:31,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:00:31,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:00:31,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 188 conjunts are in the unsatisfiable core [2021-12-06 18:00:31,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:00:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 25484 backedges. 8556 proven. 16928 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:37,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:00:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25484 backedges. 8556 proven. 16928 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:38,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613833979] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:00:38,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:00:38,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [188, 96, 96] total 282 [2021-12-06 18:00:38,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819088809] [2021-12-06 18:00:38,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:00:38,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 282 states [2021-12-06 18:00:38,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:38,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 282 interpolants. [2021-12-06 18:00:38,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13303, Invalid=65939, Unknown=0, NotChecked=0, Total=79242 [2021-12-06 18:00:38,478 INFO L87 Difference]: Start difference. First operand 565 states and 568 transitions. Second operand has 282 states, 282 states have (on average 3.99290780141844) internal successors, (1126), 282 states have internal predecessors, (1126), 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)