./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/watermelon.c --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_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/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_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/watermelon.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/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_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/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 dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:43:34,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:43:34,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:43:34,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:43:34,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:43:34,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:43:34,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:43:34,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:43:34,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:43:34,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:43:34,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:43:34,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:43:34,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:43:34,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:43:34,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:43:34,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:43:34,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:43:34,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:43:34,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:43:34,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:43:34,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:43:34,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:43:34,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:43:34,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:43:34,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:43:34,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:43:34,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:43:34,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:43:34,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:43:34,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:43:34,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:43:34,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:43:34,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:43:34,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:43:34,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:43:34,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:43:34,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:43:34,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:43:34,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:43:34,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:43:34,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:43:34,492 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:43:34,508 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:43:34,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:43:34,508 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:43:34,509 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:43:34,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:43:34,509 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:43:34,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:43:34,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:43:34,510 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:43:34,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:43:34,510 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:43:34,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:43:34,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:43:34,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:43:34,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:43:34,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:43:34,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:43:34,511 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:43:34,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:43:34,511 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:43:34,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:43:34,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:43:34,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:43:34,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:43:34,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:43:34,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:43:34,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:43:34,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:43:34,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:43:34,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:43:34,512 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:43:34,512 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:43:34,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:43:34,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:43:34,513 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_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 [2021-12-06 20:43:34,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:43:34,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:43:34,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:43:34,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:43:34,709 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:43:34,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loops-crafted-1/watermelon.c [2021-12-06 20:43:34,754 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/data/9c9613251/7aa51de3f4de40f08e46f5259c7cd3d7/FLAG0e2a8ab9b [2021-12-06 20:43:35,168 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:43:35,168 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/sv-benchmarks/c/loops-crafted-1/watermelon.c [2021-12-06 20:43:35,173 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/data/9c9613251/7aa51de3f4de40f08e46f5259c7cd3d7/FLAG0e2a8ab9b [2021-12-06 20:43:35,182 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/data/9c9613251/7aa51de3f4de40f08e46f5259c7cd3d7 [2021-12-06 20:43:35,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:43:35,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:43:35,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:43:35,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:43:35,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:43:35,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:43:35" (1/1) ... [2021-12-06 20:43:35,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46a2b860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:35, skipping insertion in model container [2021-12-06 20:43:35,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:43:35" (1/1) ... [2021-12-06 20:43:35,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:43:35,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:43:35,308 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_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/sv-benchmarks/c/loops-crafted-1/watermelon.c[373,386] [2021-12-06 20:43:35,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:43:35,328 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:43:35,337 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_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/sv-benchmarks/c/loops-crafted-1/watermelon.c[373,386] [2021-12-06 20:43:35,344 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:43:35,354 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:43:35,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:35 WrapperNode [2021-12-06 20:43:35,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:43:35,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:43:35,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:43:35,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:43:35,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:35" (1/1) ... [2021-12-06 20:43:35,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:35" (1/1) ... [2021-12-06 20:43:35,380 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 64 [2021-12-06 20:43:35,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:43:35,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:43:35,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:43:35,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:43:35,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:35" (1/1) ... [2021-12-06 20:43:35,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:35" (1/1) ... [2021-12-06 20:43:35,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:35" (1/1) ... [2021-12-06 20:43:35,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:35" (1/1) ... [2021-12-06 20:43:35,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:35" (1/1) ... [2021-12-06 20:43:35,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:35" (1/1) ... [2021-12-06 20:43:35,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:35" (1/1) ... [2021-12-06 20:43:35,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:43:35,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:43:35,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:43:35,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:43:35,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:35" (1/1) ... [2021-12-06 20:43:35,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:43:35,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:35,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:43:35,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:43:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:43:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:43:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:43:35,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:43:35,500 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:43:35,501 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:43:35,588 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:43:35,593 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:43:35,593 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 20:43:35,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:43:35 BoogieIcfgContainer [2021-12-06 20:43:35,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:43:35,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:43:35,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:43:35,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:43:35,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:43:35" (1/3) ... [2021-12-06 20:43:35,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c79c152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:43:35, skipping insertion in model container [2021-12-06 20:43:35,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:35" (2/3) ... [2021-12-06 20:43:35,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c79c152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:43:35, skipping insertion in model container [2021-12-06 20:43:35,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:43:35" (3/3) ... [2021-12-06 20:43:35,601 INFO L111 eAbstractionObserver]: Analyzing ICFG watermelon.c [2021-12-06 20:43:35,605 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:43:35,605 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:43:35,641 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:43:35,646 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 20:43:35,647 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:43:35,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:35,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 20:43:35,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:35,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:35,663 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:35,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:35,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2143149025, now seen corresponding path program 1 times [2021-12-06 20:43:35,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:35,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024997867] [2021-12-06 20:43:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:35,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:35,851 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 20:43:35,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:35,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024997867] [2021-12-06 20:43:35,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024997867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:43:35,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:43:35,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 20:43:35,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976872815] [2021-12-06 20:43:35,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:43:35,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:43:35,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:35,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:43:35,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:43:35,881 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 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 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:35,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:35,992 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-12-06 20:43:35,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:43:35,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-06 20:43:35,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:36,000 INFO L225 Difference]: With dead ends: 68 [2021-12-06 20:43:36,001 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 20:43:36,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:43:36,006 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 98 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:36,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 167 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:43:36,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 20:43:36,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-12-06 20:43:36,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-06 20:43:36,033 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 11 [2021-12-06 20:43:36,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:36,033 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-06 20:43:36,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:36,034 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-12-06 20:43:36,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 20:43:36,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:36,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:36,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:43:36,035 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:36,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:36,036 INFO L85 PathProgramCache]: Analyzing trace with hash -906524851, now seen corresponding path program 1 times [2021-12-06 20:43:36,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:36,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295551525] [2021-12-06 20:43:36,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:36,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:36,079 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 20:43:36,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:36,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295551525] [2021-12-06 20:43:36,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295551525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:43:36,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:43:36,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:43:36,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302640744] [2021-12-06 20:43:36,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:43:36,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:43:36,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:36,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:43:36,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:43:36,083 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:36,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:36,097 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-12-06 20:43:36,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:43:36,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-12-06 20:43:36,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:36,100 INFO L225 Difference]: With dead ends: 35 [2021-12-06 20:43:36,100 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 20:43:36,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:43:36,102 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:36,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:43:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 20:43:36,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-12-06 20:43:36,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:36,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-12-06 20:43:36,110 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2021-12-06 20:43:36,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:36,110 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-12-06 20:43:36,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:36,110 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-12-06 20:43:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 20:43:36,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:36,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:36,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:43:36,112 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:36,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:36,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1897717841, now seen corresponding path program 1 times [2021-12-06 20:43:36,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:36,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931316115] [2021-12-06 20:43:36,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:36,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:36,147 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 20:43:36,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:36,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931316115] [2021-12-06 20:43:36,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931316115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:43:36,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:43:36,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:43:36,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316848669] [2021-12-06 20:43:36,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:43:36,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:43:36,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:36,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:43:36,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:43:36,149 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:36,161 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-12-06 20:43:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:43:36,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-12-06 20:43:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:36,162 INFO L225 Difference]: With dead ends: 48 [2021-12-06 20:43:36,162 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 20:43:36,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:43:36,163 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:36,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:43:36,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 20:43:36,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-06 20:43:36,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-06 20:43:36,168 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 13 [2021-12-06 20:43:36,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:36,169 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-06 20:43:36,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:36,169 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-06 20:43:36,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 20:43:36,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:36,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:36,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 20:43:36,170 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:36,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:36,171 INFO L85 PathProgramCache]: Analyzing trace with hash 983883823, now seen corresponding path program 1 times [2021-12-06 20:43:36,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:36,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209098094] [2021-12-06 20:43:36,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:36,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:36,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:36,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209098094] [2021-12-06 20:43:36,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209098094] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:36,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839615454] [2021-12-06 20:43:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:36,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:36,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:36,211 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:36,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:43:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:36,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:43:36,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:43:36,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:43:36,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839615454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:43:36,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:43:36,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-12-06 20:43:36,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737397186] [2021-12-06 20:43:36,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:43:36,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:43:36,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:36,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:43:36,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:43:36,504 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:36,569 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-12-06 20:43:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:43:36,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-06 20:43:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:36,570 INFO L225 Difference]: With dead ends: 44 [2021-12-06 20:43:36,570 INFO L226 Difference]: Without dead ends: 32 [2021-12-06 20:43:36,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:43:36,571 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:36,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:43:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-06 20:43:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2021-12-06 20:43:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-12-06 20:43:36,576 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15 [2021-12-06 20:43:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:36,576 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-12-06 20:43:36,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-12-06 20:43:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 20:43:36,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:36,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:36,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:43:36,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:36,779 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:36,781 INFO L85 PathProgramCache]: Analyzing trace with hash 891572815, now seen corresponding path program 1 times [2021-12-06 20:43:36,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:36,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633486456] [2021-12-06 20:43:36,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:36,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:36,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:36,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633486456] [2021-12-06 20:43:36,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633486456] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:36,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338354614] [2021-12-06 20:43:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:36,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:36,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:36,927 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:36,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:43:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:37,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:43:37,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:37,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:37,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338354614] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:37,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:37,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-06 20:43:37,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452228905] [2021-12-06 20:43:37,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:37,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:43:37,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:43:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:43:37,144 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:37,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:37,155 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2021-12-06 20:43:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:43:37,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 15 [2021-12-06 20:43:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:37,156 INFO L225 Difference]: With dead ends: 50 [2021-12-06 20:43:37,156 INFO L226 Difference]: Without dead ends: 30 [2021-12-06 20:43:37,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:43:37,158 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:37,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:43:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-06 20:43:37,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-12-06 20:43:37,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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 20:43:37,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-12-06 20:43:37,164 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2021-12-06 20:43:37,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:37,165 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-12-06 20:43:37,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-12-06 20:43:37,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 20:43:37,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:37,165 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:37,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:43:37,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:37,368 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:37,369 INFO L85 PathProgramCache]: Analyzing trace with hash 353844429, now seen corresponding path program 2 times [2021-12-06 20:43:37,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:37,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749855457] [2021-12-06 20:43:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:37,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:43:37,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:37,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749855457] [2021-12-06 20:43:37,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749855457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:43:37,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:43:37,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 20:43:37,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937241296] [2021-12-06 20:43:37,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:43:37,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:43:37,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:37,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:43:37,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:43:37,563 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:37,590 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-12-06 20:43:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:43:37,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 17 [2021-12-06 20:43:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:37,591 INFO L225 Difference]: With dead ends: 34 [2021-12-06 20:43:37,591 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 20:43:37,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:43:37,592 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:37,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 17 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:43:37,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 20:43:37,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-06 20:43:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:37,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-06 20:43:37,597 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2021-12-06 20:43:37,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:37,597 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-06 20:43:37,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-06 20:43:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 20:43:37,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:37,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:37,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 20:43:37,598 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:37,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:37,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1453414625, now seen corresponding path program 1 times [2021-12-06 20:43:37,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:37,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828678360] [2021-12-06 20:43:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:37,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:43:37,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:37,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828678360] [2021-12-06 20:43:37,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828678360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:37,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910223810] [2021-12-06 20:43:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:37,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:37,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:37,640 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:37,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:43:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:37,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:43:37,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:43:37,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:43:37,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910223810] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:37,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:37,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2021-12-06 20:43:37,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142080964] [2021-12-06 20:43:37,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:37,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 20:43:37,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:37,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 20:43:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:43:37,746 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:37,803 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-12-06 20:43:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 20:43:37,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 21 [2021-12-06 20:43:37,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:37,804 INFO L225 Difference]: With dead ends: 56 [2021-12-06 20:43:37,804 INFO L226 Difference]: Without dead ends: 43 [2021-12-06 20:43:37,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:43:37,806 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:37,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 68 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:43:37,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-06 20:43:37,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-12-06 20:43:37,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:37,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-06 20:43:37,815 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2021-12-06 20:43:37,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:37,815 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-06 20:43:37,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:37,816 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-06 20:43:37,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 20:43:37,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:37,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:37,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 20:43:38,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:38,019 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:38,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1604143171, now seen corresponding path program 1 times [2021-12-06 20:43:38,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:38,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395185633] [2021-12-06 20:43:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:38,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:43:38,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:38,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395185633] [2021-12-06 20:43:38,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395185633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:38,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503422814] [2021-12-06 20:43:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:38,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:38,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:38,198 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:38,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:43:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:38,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:43:38,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:43:38,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:43:38,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503422814] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:38,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:38,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-06 20:43:38,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589218292] [2021-12-06 20:43:38,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:38,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 20:43:38,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:38,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 20:43:38,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:43:38,337 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:38,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:38,361 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-12-06 20:43:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:43:38,362 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 20:43:38,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:38,362 INFO L225 Difference]: With dead ends: 59 [2021-12-06 20:43:38,363 INFO L226 Difference]: Without dead ends: 54 [2021-12-06 20:43:38,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:43:38,364 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:38,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 113 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:43:38,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-06 20:43:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2021-12-06 20:43:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-12-06 20:43:38,372 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 23 [2021-12-06 20:43:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:38,372 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-12-06 20:43:38,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:38,373 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-12-06 20:43:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 20:43:38,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:38,374 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:38,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:43:38,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 20:43:38,574 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:38,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1602296129, now seen corresponding path program 1 times [2021-12-06 20:43:38,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:38,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841724691] [2021-12-06 20:43:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:38,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:43:38,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:38,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841724691] [2021-12-06 20:43:38,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841724691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:43:38,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:43:38,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:43:38,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157714565] [2021-12-06 20:43:38,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:43:38,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:43:38,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:38,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:43:38,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:43:38,620 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:38,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:38,661 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-12-06 20:43:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:43:38,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 23 [2021-12-06 20:43:38,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:38,662 INFO L225 Difference]: With dead ends: 49 [2021-12-06 20:43:38,662 INFO L226 Difference]: Without dead ends: 43 [2021-12-06 20:43:38,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:43:38,662 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:38,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 88 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:43:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-06 20:43:38,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-12-06 20:43:38,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-12-06 20:43:38,673 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 23 [2021-12-06 20:43:38,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:38,674 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-12-06 20:43:38,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:38,674 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-12-06 20:43:38,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 20:43:38,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:38,674 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:38,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 20:43:38,675 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:38,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:38,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1934230497, now seen corresponding path program 2 times [2021-12-06 20:43:38,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:38,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343079732] [2021-12-06 20:43:38,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:38,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:38,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:38,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343079732] [2021-12-06 20:43:38,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343079732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:38,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023710338] [2021-12-06 20:43:38,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:43:38,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:38,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:38,845 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:38,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:43:38,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:43:38,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:38,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:43:38,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:39,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:39,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023710338] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:39,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:39,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2021-12-06 20:43:39,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468830875] [2021-12-06 20:43:39,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:39,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 20:43:39,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:39,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 20:43:39,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-12-06 20:43:39,366 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:39,671 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2021-12-06 20:43:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 20:43:39,671 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 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 25 [2021-12-06 20:43:39,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:39,672 INFO L225 Difference]: With dead ends: 55 [2021-12-06 20:43:39,672 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 20:43:39,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2021-12-06 20:43:39,673 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 61 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:39,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 79 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:39,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 20:43:39,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-12-06 20:43:39,679 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 20:43:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-12-06 20:43:39,680 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 25 [2021-12-06 20:43:39,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:39,680 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-12-06 20:43:39,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:39,680 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-12-06 20:43:39,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 20:43:39,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:39,681 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:39,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 20:43:39,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 20:43:39,882 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:39,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:39,883 INFO L85 PathProgramCache]: Analyzing trace with hash 836427775, now seen corresponding path program 2 times [2021-12-06 20:43:39,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:39,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296879584] [2021-12-06 20:43:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:39,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:40,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:40,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296879584] [2021-12-06 20:43:40,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296879584] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:40,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891854735] [2021-12-06 20:43:40,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:43:40,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:40,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:40,122 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:40,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:43:40,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:43:40,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:40,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:43:40,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:40,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:40,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891854735] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:40,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:40,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2021-12-06 20:43:40,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835904721] [2021-12-06 20:43:40,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:40,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 20:43:40,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:40,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 20:43:40,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-12-06 20:43:40,575 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:40,771 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-12-06 20:43:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 20:43:40,772 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 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 25 [2021-12-06 20:43:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:40,772 INFO L225 Difference]: With dead ends: 47 [2021-12-06 20:43:40,772 INFO L226 Difference]: Without dead ends: 41 [2021-12-06 20:43:40,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2021-12-06 20:43:40,773 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:40,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 38 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:40,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-06 20:43:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-12-06 20:43:40,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-12-06 20:43:40,778 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2021-12-06 20:43:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:40,778 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-12-06 20:43:40,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-12-06 20:43:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 20:43:40,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:40,779 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:40,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 20:43:40,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:40,979 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:40,980 INFO L85 PathProgramCache]: Analyzing trace with hash 924111969, now seen corresponding path program 3 times [2021-12-06 20:43:40,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:40,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746066568] [2021-12-06 20:43:40,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:40,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:41,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:41,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746066568] [2021-12-06 20:43:41,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746066568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:41,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329334175] [2021-12-06 20:43:41,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:43:41,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:41,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:41,185 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:41,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:43:41,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 20:43:41,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:41,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 20:43:41,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:41,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:41,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329334175] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:41,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:41,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2021-12-06 20:43:41,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696190715] [2021-12-06 20:43:41,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:41,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 20:43:41,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:41,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 20:43:41,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-12-06 20:43:41,748 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:42,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:42,240 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2021-12-06 20:43:42,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 20:43:42,240 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 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 27 [2021-12-06 20:43:42,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:42,241 INFO L225 Difference]: With dead ends: 83 [2021-12-06 20:43:42,241 INFO L226 Difference]: Without dead ends: 64 [2021-12-06 20:43:42,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=384, Invalid=1338, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 20:43:42,242 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 193 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:42,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 121 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:42,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-06 20:43:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2021-12-06 20:43:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 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 20:43:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-12-06 20:43:42,249 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 27 [2021-12-06 20:43:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:42,250 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-12-06 20:43:42,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-12-06 20:43:42,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 20:43:42,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:42,251 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:42,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 20:43:42,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 20:43:42,453 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:42,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash -98803427, now seen corresponding path program 3 times [2021-12-06 20:43:42,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:42,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048245967] [2021-12-06 20:43:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:42,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:42,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:42,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048245967] [2021-12-06 20:43:42,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048245967] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:42,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399685021] [2021-12-06 20:43:42,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:43:42,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:42,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:42,630 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:42,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:43:42,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 20:43:42,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:42,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 20:43:42,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:42,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:43,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399685021] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:43,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:43,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2021-12-06 20:43:43,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606417801] [2021-12-06 20:43:43,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:43,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 20:43:43,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:43,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 20:43:43,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-12-06 20:43:43,091 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:43,336 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-12-06 20:43:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 20:43:43,336 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 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 27 [2021-12-06 20:43:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:43,337 INFO L225 Difference]: With dead ends: 65 [2021-12-06 20:43:43,337 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 20:43:43,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 20:43:43,338 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 172 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:43,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 62 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 20:43:43,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2021-12-06 20:43:43,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 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 20:43:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-12-06 20:43:43,343 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 27 [2021-12-06 20:43:43,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:43,343 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-12-06 20:43:43,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-12-06 20:43:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 20:43:43,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:43,344 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:43,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 20:43:43,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:43,545 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:43,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:43,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1588252031, now seen corresponding path program 4 times [2021-12-06 20:43:43,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:43,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496877446] [2021-12-06 20:43:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:43,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:43,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:43,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496877446] [2021-12-06 20:43:43,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496877446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:43,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560012344] [2021-12-06 20:43:43,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:43:43,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:43,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:43,734 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:43,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 20:43:43,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:43:43,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:43,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 20:43:43,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:44,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:44,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560012344] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:44,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:44,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2021-12-06 20:43:44,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559123008] [2021-12-06 20:43:44,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:44,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 20:43:44,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:44,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 20:43:44,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-12-06 20:43:44,190 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:44,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:44,449 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2021-12-06 20:43:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:43:44,450 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 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 29 [2021-12-06 20:43:44,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:44,450 INFO L225 Difference]: With dead ends: 63 [2021-12-06 20:43:44,450 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 20:43:44,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=1021, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 20:43:44,451 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:44,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 51 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:44,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 20:43:44,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-12-06 20:43:44,456 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 20:43:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-12-06 20:43:44,456 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 29 [2021-12-06 20:43:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:44,456 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-12-06 20:43:44,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-12-06 20:43:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 20:43:44,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:44,457 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:44,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 20:43:44,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:44,659 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:44,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:44,660 INFO L85 PathProgramCache]: Analyzing trace with hash -462032417, now seen corresponding path program 4 times [2021-12-06 20:43:44,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:44,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989476945] [2021-12-06 20:43:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:44,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:44,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:44,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989476945] [2021-12-06 20:43:44,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989476945] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:44,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161669595] [2021-12-06 20:43:44,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:43:44,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:44,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:44,841 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:44,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 20:43:44,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:43:44,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:44,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 20:43:44,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:45,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:45,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161669595] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:45,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:45,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2021-12-06 20:43:45,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626470365] [2021-12-06 20:43:45,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:45,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 20:43:45,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:45,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 20:43:45,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-12-06 20:43:45,277 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:45,464 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-12-06 20:43:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:43:45,464 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 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 29 [2021-12-06 20:43:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:45,464 INFO L225 Difference]: With dead ends: 53 [2021-12-06 20:43:45,464 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 20:43:45,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=346, Invalid=914, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 20:43:45,465 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 94 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:45,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 32 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 20:43:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-12-06 20:43:45,470 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 20:43:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-12-06 20:43:45,470 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 29 [2021-12-06 20:43:45,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:45,470 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-12-06 20:43:45,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-12-06 20:43:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 20:43:45,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:45,471 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:45,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 20:43:45,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:45,673 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1355616703, now seen corresponding path program 5 times [2021-12-06 20:43:45,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:45,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951352422] [2021-12-06 20:43:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:45,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:45,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:45,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951352422] [2021-12-06 20:43:45,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951352422] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:45,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297352756] [2021-12-06 20:43:45,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:43:45,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:45,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:45,913 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:45,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 20:43:45,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 20:43:45,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:45,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 20:43:45,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:46,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:46,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297352756] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:46,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:46,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-06 20:43:46,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250942692] [2021-12-06 20:43:46,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:46,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 20:43:46,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:46,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 20:43:46,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 20:43:46,512 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:47,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:47,087 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-12-06 20:43:47,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 20:43:47,087 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 20:43:47,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:47,088 INFO L225 Difference]: With dead ends: 93 [2021-12-06 20:43:47,088 INFO L226 Difference]: Without dead ends: 72 [2021-12-06 20:43:47,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=485, Invalid=1771, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 20:43:47,089 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 253 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:47,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 105 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:47,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-06 20:43:47,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2021-12-06 20:43:47,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-12-06 20:43:47,095 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 31 [2021-12-06 20:43:47,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:47,096 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-12-06 20:43:47,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:47,096 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-12-06 20:43:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 20:43:47,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:47,096 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:47,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 20:43:47,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 20:43:47,298 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:47,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:47,299 INFO L85 PathProgramCache]: Analyzing trace with hash 943358845, now seen corresponding path program 5 times [2021-12-06 20:43:47,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:47,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378346583] [2021-12-06 20:43:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:47,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:47,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:47,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378346583] [2021-12-06 20:43:47,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378346583] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:47,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315475956] [2021-12-06 20:43:47,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:43:47,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:47,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:47,485 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:47,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 20:43:47,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 20:43:47,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:47,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 20:43:47,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:47,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:48,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315475956] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:48,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:48,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2021-12-06 20:43:48,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869488386] [2021-12-06 20:43:48,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:48,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 20:43:48,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:48,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 20:43:48,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 20:43:48,052 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:48,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:48,334 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2021-12-06 20:43:48,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 20:43:48,335 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 20:43:48,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:48,335 INFO L225 Difference]: With dead ends: 71 [2021-12-06 20:43:48,335 INFO L226 Difference]: Without dead ends: 65 [2021-12-06 20:43:48,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=511, Invalid=1469, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 20:43:48,336 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:48,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 74 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:48,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-06 20:43:48,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2021-12-06 20:43:48,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-12-06 20:43:48,341 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 31 [2021-12-06 20:43:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:48,342 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-12-06 20:43:48,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:48,342 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-12-06 20:43:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 20:43:48,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:48,342 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:48,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 20:43:48,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 20:43:48,543 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:48,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1916151841, now seen corresponding path program 6 times [2021-12-06 20:43:48,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:48,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546046809] [2021-12-06 20:43:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:48,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:48,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:48,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546046809] [2021-12-06 20:43:48,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546046809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:48,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97372439] [2021-12-06 20:43:48,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:43:48,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:48,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:48,722 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:48,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 20:43:48,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 20:43:48,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:48,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 20:43:48,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:49,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:49,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97372439] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:49,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:49,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2021-12-06 20:43:49,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788535079] [2021-12-06 20:43:49,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:49,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 20:43:49,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:49,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 20:43:49,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 20:43:49,228 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:49,571 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-12-06 20:43:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 20:43:49,571 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 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 33 [2021-12-06 20:43:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:49,571 INFO L225 Difference]: With dead ends: 71 [2021-12-06 20:43:49,571 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 20:43:49,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=1398, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 20:43:49,573 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 89 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:49,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 121 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:49,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 20:43:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-06 20:43:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-12-06 20:43:49,578 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 33 [2021-12-06 20:43:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:49,578 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-12-06 20:43:49,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-12-06 20:43:49,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 20:43:49,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:49,579 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:49,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-06 20:43:49,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 20:43:49,780 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:49,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:49,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1672289471, now seen corresponding path program 6 times [2021-12-06 20:43:49,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:49,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737544192] [2021-12-06 20:43:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:49,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:49,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:49,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737544192] [2021-12-06 20:43:49,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737544192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:49,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707307496] [2021-12-06 20:43:49,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:43:49,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:49,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:49,963 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:49,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 20:43:49,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 20:43:49,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:49,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 20:43:49,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:50,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:50,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707307496] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:50,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:50,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2021-12-06 20:43:50,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855211705] [2021-12-06 20:43:50,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:50,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 20:43:50,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:50,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 20:43:50,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 20:43:50,420 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:50,637 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-12-06 20:43:50,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 20:43:50,638 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 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 33 [2021-12-06 20:43:50,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:50,638 INFO L225 Difference]: With dead ends: 59 [2021-12-06 20:43:50,638 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 20:43:50,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 20:43:50,640 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 184 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:50,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 28 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:50,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 20:43:50,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-12-06 20:43:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:50,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-12-06 20:43:50,648 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 33 [2021-12-06 20:43:50,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:50,648 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-12-06 20:43:50,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:50,648 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-12-06 20:43:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 20:43:50,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:50,649 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:50,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 20:43:50,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:50,850 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:50,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:50,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1028317473, now seen corresponding path program 7 times [2021-12-06 20:43:50,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:50,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216665869] [2021-12-06 20:43:50,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:50,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:51,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:51,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216665869] [2021-12-06 20:43:51,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216665869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:51,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45518195] [2021-12-06 20:43:51,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:43:51,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:51,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:51,089 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:51,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 20:43:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:51,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 20:43:51,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:51,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:51,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45518195] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:51,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:51,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 41 [2021-12-06 20:43:51,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447618299] [2021-12-06 20:43:51,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:51,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 20:43:51,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:51,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 20:43:51,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 20:43:51,714 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:52,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:52,347 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2021-12-06 20:43:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 20:43:52,348 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 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 35 [2021-12-06 20:43:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:52,348 INFO L225 Difference]: With dead ends: 103 [2021-12-06 20:43:52,348 INFO L226 Difference]: Without dead ends: 80 [2021-12-06 20:43:52,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=600, Invalid=2262, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 20:43:52,349 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 238 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:52,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 110 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-06 20:43:52,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-12-06 20:43:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 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 20:43:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-12-06 20:43:52,355 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 35 [2021-12-06 20:43:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:52,355 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-12-06 20:43:52,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-12-06 20:43:52,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 20:43:52,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:52,356 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:52,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 20:43:52,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:52,558 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:52,559 INFO L85 PathProgramCache]: Analyzing trace with hash 208821981, now seen corresponding path program 7 times [2021-12-06 20:43:52,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:52,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830098566] [2021-12-06 20:43:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:52,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:52,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:52,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830098566] [2021-12-06 20:43:52,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830098566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:52,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075484416] [2021-12-06 20:43:52,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:43:52,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:52,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:52,818 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:52,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 20:43:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:52,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 20:43:52,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:53,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:53,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075484416] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:53,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:53,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 40 [2021-12-06 20:43:53,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718240187] [2021-12-06 20:43:53,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:53,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 20:43:53,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:53,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 20:43:53,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 20:43:53,417 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:53,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:53,755 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-12-06 20:43:53,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 20:43:53,755 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 35 [2021-12-06 20:43:53,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:53,756 INFO L225 Difference]: With dead ends: 77 [2021-12-06 20:43:53,756 INFO L226 Difference]: Without dead ends: 71 [2021-12-06 20:43:53,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=652, Invalid=1898, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 20:43:53,757 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 149 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:53,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 100 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:53,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-06 20:43:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2021-12-06 20:43:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:53,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-12-06 20:43:53,763 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2021-12-06 20:43:53,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:53,763 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-12-06 20:43:53,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:53,763 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-12-06 20:43:53,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 20:43:53,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:53,764 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:53,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 20:43:53,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:53,964 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:53,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:53,965 INFO L85 PathProgramCache]: Analyzing trace with hash 863525695, now seen corresponding path program 8 times [2021-12-06 20:43:53,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:53,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500589857] [2021-12-06 20:43:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:53,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:54,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:54,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500589857] [2021-12-06 20:43:54,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500589857] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:54,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226207610] [2021-12-06 20:43:54,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:43:54,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:54,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:54,162 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:54,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 20:43:54,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:43:54,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:54,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 20:43:54,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:54,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:54,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226207610] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:54,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:54,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2021-12-06 20:43:54,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751021353] [2021-12-06 20:43:54,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:54,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 20:43:54,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:54,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 20:43:54,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 20:43:54,750 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:55,135 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2021-12-06 20:43:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 20:43:55,136 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 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 37 [2021-12-06 20:43:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:55,136 INFO L225 Difference]: With dead ends: 79 [2021-12-06 20:43:55,136 INFO L226 Difference]: Without dead ends: 56 [2021-12-06 20:43:55,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=519, Invalid=1833, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 20:43:55,137 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 120 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:55,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 76 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-06 20:43:55,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-12-06 20:43:55,145 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 20:43:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-12-06 20:43:55,145 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 37 [2021-12-06 20:43:55,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:55,145 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-12-06 20:43:55,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-12-06 20:43:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 20:43:55,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:55,146 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:55,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 20:43:55,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 20:43:55,347 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:55,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:55,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1276272481, now seen corresponding path program 8 times [2021-12-06 20:43:55,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:55,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439423241] [2021-12-06 20:43:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:55,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:55,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:55,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439423241] [2021-12-06 20:43:55,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439423241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:55,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826992772] [2021-12-06 20:43:55,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:43:55,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:55,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:55,591 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:55,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 20:43:55,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:43:55,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:55,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 20:43:55,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:55,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:56,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826992772] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:56,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:56,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2021-12-06 20:43:56,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567425337] [2021-12-06 20:43:56,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:56,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 20:43:56,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:56,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 20:43:56,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 20:43:56,188 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:56,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:56,488 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-12-06 20:43:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 20:43:56,488 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 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 37 [2021-12-06 20:43:56,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:56,489 INFO L225 Difference]: With dead ends: 65 [2021-12-06 20:43:56,489 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 20:43:56,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=602, Invalid=1654, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 20:43:56,490 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 201 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:56,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 54 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:56,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 20:43:56,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2021-12-06 20:43:56,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:56,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-12-06 20:43:56,496 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 37 [2021-12-06 20:43:56,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:56,496 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-12-06 20:43:56,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:56,496 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-12-06 20:43:56,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 20:43:56,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:56,497 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:56,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-06 20:43:56,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:56,698 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:56,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2138696961, now seen corresponding path program 9 times [2021-12-06 20:43:56,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:56,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633239115] [2021-12-06 20:43:56,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:56,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:56,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:56,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633239115] [2021-12-06 20:43:56,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633239115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:56,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799867316] [2021-12-06 20:43:56,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:43:56,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:56,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:56,959 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:56,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 20:43:56,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 20:43:56,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:56,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 20:43:56,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:57,377 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:57,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:57,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799867316] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:57,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:57,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 46 [2021-12-06 20:43:57,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776002858] [2021-12-06 20:43:57,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:57,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 20:43:57,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:57,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 20:43:57,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1696, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 20:43:57,665 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:58,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:58,414 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-12-06 20:43:58,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 20:43:58,415 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 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 39 [2021-12-06 20:43:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:58,415 INFO L225 Difference]: With dead ends: 113 [2021-12-06 20:43:58,415 INFO L226 Difference]: Without dead ends: 88 [2021-12-06 20:43:58,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=729, Invalid=2811, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 20:43:58,417 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 202 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:58,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 111 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:58,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-06 20:43:58,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2021-12-06 20:43:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 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 20:43:58,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-12-06 20:43:58,424 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 39 [2021-12-06 20:43:58,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:58,424 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-12-06 20:43:58,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:58,424 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-12-06 20:43:58,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 20:43:58,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:58,424 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:58,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 20:43:58,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 20:43:58,626 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:58,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1939262659, now seen corresponding path program 9 times [2021-12-06 20:43:58,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:58,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200826785] [2021-12-06 20:43:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:58,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:58,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:58,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200826785] [2021-12-06 20:43:58,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200826785] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:43:58,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254301535] [2021-12-06 20:43:58,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:43:58,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:58,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:58,872 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:58,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 20:43:58,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 20:43:58,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:58,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 20:43:58,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:59,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:59,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254301535] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:59,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:43:59,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 45 [2021-12-06 20:43:59,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760231999] [2021-12-06 20:43:59,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:59,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 20:43:59,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:59,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 20:43:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 20:43:59,571 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:59,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:59,932 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2021-12-06 20:43:59,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 20:43:59,933 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 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 39 [2021-12-06 20:43:59,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:59,933 INFO L225 Difference]: With dead ends: 83 [2021-12-06 20:43:59,933 INFO L226 Difference]: Without dead ends: 77 [2021-12-06 20:43:59,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=811, Invalid=2381, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 20:43:59,935 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 204 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:59,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 68 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:43:59,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-06 20:43:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2021-12-06 20:43:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 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 20:43:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-12-06 20:43:59,942 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 39 [2021-12-06 20:43:59,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:59,942 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-12-06 20:43:59,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:59,942 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-12-06 20:43:59,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 20:43:59,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:59,943 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:59,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 20:44:00,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 20:44:00,144 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:00,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1861511265, now seen corresponding path program 10 times [2021-12-06 20:44:00,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:00,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792836792] [2021-12-06 20:44:00,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:00,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:00,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:00,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792836792] [2021-12-06 20:44:00,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792836792] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:00,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148286088] [2021-12-06 20:44:00,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:44:00,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:00,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:00,384 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:00,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 20:44:00,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:44:00,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:00,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 20:44:00,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:00,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:01,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148286088] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:01,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:01,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2021-12-06 20:44:01,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343653782] [2021-12-06 20:44:01,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:01,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 20:44:01,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:01,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 20:44:01,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 20:44:01,089 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:01,522 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2021-12-06 20:44:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 20:44:01,522 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 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 41 [2021-12-06 20:44:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:01,523 INFO L225 Difference]: With dead ends: 87 [2021-12-06 20:44:01,523 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 20:44:01,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=644, Invalid=2326, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 20:44:01,524 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 93 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:01,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 118 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:44:01,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 20:44:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-12-06 20:44:01,531 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 20:44:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-12-06 20:44:01,531 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 41 [2021-12-06 20:44:01,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:01,531 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-12-06 20:44:01,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-12-06 20:44:01,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 20:44:01,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:01,532 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:01,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 20:44:01,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 20:44:01,733 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:01,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:01,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1603583359, now seen corresponding path program 10 times [2021-12-06 20:44:01,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:01,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265575424] [2021-12-06 20:44:01,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:01,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:02,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:02,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265575424] [2021-12-06 20:44:02,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265575424] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:02,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691519542] [2021-12-06 20:44:02,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:44:02,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:02,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:02,043 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:02,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 20:44:02,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:44:02,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:02,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 20:44:02,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:02,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:02,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691519542] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:02,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:02,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2021-12-06 20:44:02,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26738486] [2021-12-06 20:44:02,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:02,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 20:44:02,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 20:44:02,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 20:44:02,742 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:03,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:03,049 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2021-12-06 20:44:03,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 20:44:03,049 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 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 41 [2021-12-06 20:44:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:03,049 INFO L225 Difference]: With dead ends: 71 [2021-12-06 20:44:03,049 INFO L226 Difference]: Without dead ends: 65 [2021-12-06 20:44:03,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 20:44:03,051 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 81 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:03,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 61 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:44:03,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-06 20:44:03,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-12-06 20:44:03,062 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 20:44:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-12-06 20:44:03,063 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 41 [2021-12-06 20:44:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:03,063 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-12-06 20:44:03,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:03,063 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-12-06 20:44:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 20:44:03,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:03,064 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:03,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-06 20:44:03,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 20:44:03,265 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:03,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:03,265 INFO L85 PathProgramCache]: Analyzing trace with hash -573746719, now seen corresponding path program 11 times [2021-12-06 20:44:03,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:03,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83227082] [2021-12-06 20:44:03,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:03,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:03,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:03,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83227082] [2021-12-06 20:44:03,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83227082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:03,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821444286] [2021-12-06 20:44:03,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:44:03,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:03,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:03,568 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:03,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 20:44:03,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 20:44:03,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:03,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 20:44:03,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:04,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:04,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821444286] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:04,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:04,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 51 [2021-12-06 20:44:04,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22239276] [2021-12-06 20:44:04,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:04,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 20:44:04,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:04,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 20:44:04,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=2092, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 20:44:04,458 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:05,349 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2021-12-06 20:44:05,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 20:44:05,350 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 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 43 [2021-12-06 20:44:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:05,350 INFO L225 Difference]: With dead ends: 123 [2021-12-06 20:44:05,350 INFO L226 Difference]: Without dead ends: 96 [2021-12-06 20:44:05,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=872, Invalid=3418, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 20:44:05,351 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 135 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:05,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 115 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-06 20:44:05,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2021-12-06 20:44:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 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 20:44:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-06 20:44:05,359 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 43 [2021-12-06 20:44:05,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:05,359 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-06 20:44:05,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:05,360 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-06 20:44:05,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 20:44:05,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:05,360 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:05,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 20:44:05,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 20:44:05,561 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:05,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:05,562 INFO L85 PathProgramCache]: Analyzing trace with hash -709607267, now seen corresponding path program 11 times [2021-12-06 20:44:05,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:05,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032485237] [2021-12-06 20:44:05,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:05,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:05,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:05,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032485237] [2021-12-06 20:44:05,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032485237] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:05,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758470098] [2021-12-06 20:44:05,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:44:05,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:05,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:05,900 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:05,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 20:44:05,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 20:44:05,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:05,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 20:44:05,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:06,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:06,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758470098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:06,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:06,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 50 [2021-12-06 20:44:06,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979071479] [2021-12-06 20:44:06,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:06,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 20:44:06,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:06,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 20:44:06,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1994, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 20:44:06,641 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:07,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:07,054 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-12-06 20:44:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 20:44:07,054 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 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 43 [2021-12-06 20:44:07,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:07,054 INFO L225 Difference]: With dead ends: 89 [2021-12-06 20:44:07,054 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 20:44:07,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=988, Invalid=2918, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 20:44:07,055 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 143 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:07,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 77 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:44:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 20:44:07,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2021-12-06 20:44:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-12-06 20:44:07,064 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 43 [2021-12-06 20:44:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:07,064 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-12-06 20:44:07,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-12-06 20:44:07,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 20:44:07,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:07,064 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:07,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 20:44:07,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:07,265 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:07,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:07,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1278685953, now seen corresponding path program 12 times [2021-12-06 20:44:07,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:07,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819598401] [2021-12-06 20:44:07,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:07,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:07,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:07,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819598401] [2021-12-06 20:44:07,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819598401] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:07,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463250120] [2021-12-06 20:44:07,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:44:07,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:07,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:07,519 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:07,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 20:44:07,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 20:44:07,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:07,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:44:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:08,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:08,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463250120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:08,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:08,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 49 [2021-12-06 20:44:08,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307138457] [2021-12-06 20:44:08,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:08,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 20:44:08,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:08,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 20:44:08,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=1898, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 20:44:08,323 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:08,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:08,853 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2021-12-06 20:44:08,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 20:44:08,854 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 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 45 [2021-12-06 20:44:08,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:08,854 INFO L225 Difference]: With dead ends: 95 [2021-12-06 20:44:08,854 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 20:44:08,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=783, Invalid=2877, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 20:44:08,855 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:08,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 90 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:44:08,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 20:44:08,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-12-06 20:44:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 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 20:44:08,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-12-06 20:44:08,864 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 45 [2021-12-06 20:44:08,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:08,864 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-12-06 20:44:08,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:08,864 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-12-06 20:44:08,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 20:44:08,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:08,865 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:08,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 20:44:09,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:09,066 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:09,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:09,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1695567009, now seen corresponding path program 12 times [2021-12-06 20:44:09,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:09,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950065788] [2021-12-06 20:44:09,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:09,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:09,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:09,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950065788] [2021-12-06 20:44:09,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950065788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:09,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751099979] [2021-12-06 20:44:09,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:44:09,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:09,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:09,390 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:09,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 20:44:09,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 20:44:09,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:09,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:44:09,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:09,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:10,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751099979] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:10,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:10,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 49 [2021-12-06 20:44:10,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921279013] [2021-12-06 20:44:10,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:10,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 20:44:10,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:10,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 20:44:10,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1891, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 20:44:10,242 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:10,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:10,586 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-12-06 20:44:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 20:44:10,586 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 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 45 [2021-12-06 20:44:10,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:10,587 INFO L225 Difference]: With dead ends: 77 [2021-12-06 20:44:10,587 INFO L226 Difference]: Without dead ends: 71 [2021-12-06 20:44:10,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 20:44:10,588 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 204 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:10,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 30 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:44:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-06 20:44:10,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-12-06 20:44:10,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-12-06 20:44:10,597 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 45 [2021-12-06 20:44:10,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:10,597 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-12-06 20:44:10,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-12-06 20:44:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 20:44:10,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:10,598 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:10,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 20:44:10,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-06 20:44:10,799 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:10,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:10,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1371385919, now seen corresponding path program 13 times [2021-12-06 20:44:10,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:10,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187081072] [2021-12-06 20:44:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:10,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:11,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:11,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187081072] [2021-12-06 20:44:11,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187081072] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:11,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154307154] [2021-12-06 20:44:11,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:44:11,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:11,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:11,143 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:11,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 20:44:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:11,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 20:44:11,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:11,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:12,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154307154] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:12,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:12,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 56 [2021-12-06 20:44:12,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468310991] [2021-12-06 20:44:12,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:12,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 20:44:12,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:12,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 20:44:12,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=2529, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 20:44:12,091 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:13,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:13,015 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2021-12-06 20:44:13,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 20:44:13,016 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 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 47 [2021-12-06 20:44:13,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:13,016 INFO L225 Difference]: With dead ends: 133 [2021-12-06 20:44:13,016 INFO L226 Difference]: Without dead ends: 104 [2021-12-06 20:44:13,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1029, Invalid=4083, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 20:44:13,017 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 191 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:13,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 126 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:13,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-06 20:44:13,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2021-12-06 20:44:13,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-12-06 20:44:13,027 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 47 [2021-12-06 20:44:13,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:13,027 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-12-06 20:44:13,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:13,027 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-12-06 20:44:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 20:44:13,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:13,027 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:13,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-06 20:44:13,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:13,228 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1311193347, now seen corresponding path program 13 times [2021-12-06 20:44:13,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:13,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393472000] [2021-12-06 20:44:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:13,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:13,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:13,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393472000] [2021-12-06 20:44:13,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393472000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:13,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496773147] [2021-12-06 20:44:13,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:44:13,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:13,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:13,605 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:13,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 20:44:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:13,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 20:44:13,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:14,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:14,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496773147] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:14,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:14,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 55 [2021-12-06 20:44:14,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692448810] [2021-12-06 20:44:14,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:14,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 20:44:14,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:14,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 20:44:14,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=2420, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 20:44:14,443 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:14,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:14,913 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-12-06 20:44:14,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 20:44:14,913 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 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 47 [2021-12-06 20:44:14,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:14,913 INFO L225 Difference]: With dead ends: 95 [2021-12-06 20:44:14,914 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 20:44:14,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1183, Invalid=3509, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 20:44:14,914 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 121 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:14,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 75 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:44:14,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 20:44:14,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2021-12-06 20:44:14,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 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 20:44:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-12-06 20:44:14,924 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 47 [2021-12-06 20:44:14,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:14,924 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-12-06 20:44:14,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:14,925 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-12-06 20:44:14,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 20:44:14,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:14,925 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:14,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 20:44:15,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:15,126 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:15,127 INFO L85 PathProgramCache]: Analyzing trace with hash 417676127, now seen corresponding path program 14 times [2021-12-06 20:44:15,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:15,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896861013] [2021-12-06 20:44:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:15,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:15,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:15,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896861013] [2021-12-06 20:44:15,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896861013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:15,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544711833] [2021-12-06 20:44:15,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:44:15,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:15,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:15,449 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:15,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 20:44:15,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:44:15,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:15,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 20:44:15,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:15,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:16,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544711833] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:16,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:16,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 54 [2021-12-06 20:44:16,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708671271] [2021-12-06 20:44:16,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:16,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 20:44:16,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:16,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 20:44:16,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2314, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 20:44:16,303 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:16,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:16,864 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2021-12-06 20:44:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 20:44:16,864 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 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 49 [2021-12-06 20:44:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:16,865 INFO L225 Difference]: With dead ends: 103 [2021-12-06 20:44:16,865 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 20:44:16,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=936, Invalid=3486, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 20:44:16,866 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 91 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:16,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 61 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:44:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 20:44:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-12-06 20:44:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-12-06 20:44:16,876 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 49 [2021-12-06 20:44:16,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:16,876 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-12-06 20:44:16,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:16,876 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-12-06 20:44:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 20:44:16,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:16,877 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:16,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 20:44:17,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 20:44:17,078 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:17,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:17,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1748746815, now seen corresponding path program 14 times [2021-12-06 20:44:17,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:17,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575335416] [2021-12-06 20:44:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:17,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:17,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:17,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575335416] [2021-12-06 20:44:17,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575335416] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:17,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001710086] [2021-12-06 20:44:17,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:44:17,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:17,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:17,465 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:17,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 20:44:17,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:44:17,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:17,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 20:44:17,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:17,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:18,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001710086] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:18,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:18,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 54 [2021-12-06 20:44:18,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923550059] [2021-12-06 20:44:18,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:18,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 20:44:18,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:18,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 20:44:18,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 20:44:18,318 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:18,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:18,718 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2021-12-06 20:44:18,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 20:44:18,718 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 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 49 [2021-12-06 20:44:18,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:18,719 INFO L225 Difference]: With dead ends: 83 [2021-12-06 20:44:18,719 INFO L226 Difference]: Without dead ends: 77 [2021-12-06 20:44:18,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1730 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 20:44:18,719 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 201 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:18,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 37 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:44:18,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-06 20:44:18,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-12-06 20:44:18,729 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 20:44:18,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-12-06 20:44:18,730 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 49 [2021-12-06 20:44:18,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:18,730 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-12-06 20:44:18,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:18,730 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-12-06 20:44:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 20:44:18,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:18,730 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:18,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 20:44:18,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 20:44:18,931 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:18,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1489381025, now seen corresponding path program 15 times [2021-12-06 20:44:18,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:18,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317264475] [2021-12-06 20:44:18,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:18,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:19,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:19,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317264475] [2021-12-06 20:44:19,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317264475] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:19,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421176844] [2021-12-06 20:44:19,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:44:19,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:19,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:19,322 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:19,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 20:44:19,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-06 20:44:19,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:19,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 20:44:19,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:19,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:20,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421176844] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:20,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:20,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 61 [2021-12-06 20:44:20,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342204174] [2021-12-06 20:44:20,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:20,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-06 20:44:20,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:20,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-06 20:44:20,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3007, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 20:44:20,408 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:21,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:21,390 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2021-12-06 20:44:21,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 20:44:21,391 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 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 51 [2021-12-06 20:44:21,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:21,391 INFO L225 Difference]: With dead ends: 143 [2021-12-06 20:44:21,391 INFO L226 Difference]: Without dead ends: 112 [2021-12-06 20:44:21,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1200, Invalid=4806, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 20:44:21,392 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 168 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:21,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 100 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:21,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-06 20:44:21,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2021-12-06 20:44:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-12-06 20:44:21,403 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 51 [2021-12-06 20:44:21,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:21,403 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-12-06 20:44:21,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:21,403 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-12-06 20:44:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 20:44:21,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:21,404 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:21,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 20:44:21,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:21,605 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:21,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:21,606 INFO L85 PathProgramCache]: Analyzing trace with hash 978060893, now seen corresponding path program 15 times [2021-12-06 20:44:21,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:21,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368949373] [2021-12-06 20:44:21,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:21,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:22,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:22,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368949373] [2021-12-06 20:44:22,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368949373] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:22,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507899293] [2021-12-06 20:44:22,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:44:22,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:22,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:22,039 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:22,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 20:44:22,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-06 20:44:22,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:22,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 20:44:22,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:22,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:23,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507899293] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:23,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:23,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 60 [2021-12-06 20:44:23,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331783181] [2021-12-06 20:44:23,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:23,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 20:44:23,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:23,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 20:44:23,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=2887, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 20:44:23,035 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:23,581 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2021-12-06 20:44:23,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 20:44:23,581 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 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 51 [2021-12-06 20:44:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:23,581 INFO L225 Difference]: With dead ends: 101 [2021-12-06 20:44:23,581 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 20:44:23,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2218 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1396, Invalid=4154, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 20:44:23,582 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 274 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:23,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 99 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 20:44:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2021-12-06 20:44:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:23,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-12-06 20:44:23,596 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 51 [2021-12-06 20:44:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:23,597 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-12-06 20:44:23,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-12-06 20:44:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 20:44:23,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:23,597 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:23,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-06 20:44:23,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 20:44:23,798 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:23,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:23,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1367745215, now seen corresponding path program 16 times [2021-12-06 20:44:23,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:23,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074811722] [2021-12-06 20:44:23,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:23,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:24,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:24,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074811722] [2021-12-06 20:44:24,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074811722] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:24,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514467444] [2021-12-06 20:44:24,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:44:24,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:24,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:24,176 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:24,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 20:44:24,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:44:24,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:24,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 20:44:24,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:24,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:25,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514467444] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:25,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:25,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 59 [2021-12-06 20:44:25,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265726094] [2021-12-06 20:44:25,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:25,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 20:44:25,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:25,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 20:44:25,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2771, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 20:44:25,103 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:25,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:25,760 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2021-12-06 20:44:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 20:44:25,761 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 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 53 [2021-12-06 20:44:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:25,761 INFO L225 Difference]: With dead ends: 111 [2021-12-06 20:44:25,761 INFO L226 Difference]: Without dead ends: 80 [2021-12-06 20:44:25,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2010 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1103, Invalid=4153, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 20:44:25,762 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 121 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:25,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 78 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:44:25,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-06 20:44:25,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-12-06 20:44:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-12-06 20:44:25,773 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 53 [2021-12-06 20:44:25,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:25,774 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-12-06 20:44:25,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:25,774 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-12-06 20:44:25,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 20:44:25,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:25,774 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:25,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-06 20:44:25,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:25,975 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:25,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:25,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1146738145, now seen corresponding path program 16 times [2021-12-06 20:44:25,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:25,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3743550] [2021-12-06 20:44:25,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:25,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:26,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:26,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3743550] [2021-12-06 20:44:26,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3743550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:26,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564767435] [2021-12-06 20:44:26,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:44:26,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:26,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:26,371 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:26,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 20:44:26,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:44:26,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:26,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 20:44:26,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:26,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:27,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564767435] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:27,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:27,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 59 [2021-12-06 20:44:27,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499788923] [2021-12-06 20:44:27,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:27,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 20:44:27,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:27,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 20:44:27,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=2762, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 20:44:27,280 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:27,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:27,739 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-12-06 20:44:27,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 20:44:27,740 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 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 53 [2021-12-06 20:44:27,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:27,740 INFO L225 Difference]: With dead ends: 89 [2021-12-06 20:44:27,740 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 20:44:27,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2086 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1330, Invalid=3782, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 20:44:27,741 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 187 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:27,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 63 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:27,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 20:44:27,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2021-12-06 20:44:27,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-12-06 20:44:27,753 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 53 [2021-12-06 20:44:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:27,753 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-12-06 20:44:27,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:27,753 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-12-06 20:44:27,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 20:44:27,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:27,754 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:27,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 20:44:27,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 20:44:27,955 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:27,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2067142273, now seen corresponding path program 17 times [2021-12-06 20:44:27,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:27,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295225338] [2021-12-06 20:44:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:27,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:28,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:28,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295225338] [2021-12-06 20:44:28,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295225338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:28,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469008182] [2021-12-06 20:44:28,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:44:28,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:28,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:28,402 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:28,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 20:44:28,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 20:44:28,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:28,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 20:44:28,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:29,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:29,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469008182] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:29,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:29,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 66 [2021-12-06 20:44:29,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914360687] [2021-12-06 20:44:29,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:29,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-06 20:44:29,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:29,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-06 20:44:29,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=3526, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 20:44:29,554 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:30,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:30,907 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-12-06 20:44:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 20:44:30,908 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 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 55 [2021-12-06 20:44:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:30,908 INFO L225 Difference]: With dead ends: 153 [2021-12-06 20:44:30,908 INFO L226 Difference]: Without dead ends: 120 [2021-12-06 20:44:30,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2650 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1385, Invalid=5587, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 20:44:30,909 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 197 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:30,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 122 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:30,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-06 20:44:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2021-12-06 20:44:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 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 20:44:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-12-06 20:44:30,922 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 55 [2021-12-06 20:44:30,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:30,922 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-12-06 20:44:30,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:30,922 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-12-06 20:44:30,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 20:44:30,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:30,923 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:30,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-06 20:44:31,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 20:44:31,124 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:31,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2087927485, now seen corresponding path program 17 times [2021-12-06 20:44:31,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:31,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255601576] [2021-12-06 20:44:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:31,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:31,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:31,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255601576] [2021-12-06 20:44:31,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255601576] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:31,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795482048] [2021-12-06 20:44:31,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:44:31,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:31,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:31,563 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:31,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 20:44:31,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 20:44:31,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:31,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 20:44:31,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:32,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:32,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795482048] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:32,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:32,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 65 [2021-12-06 20:44:32,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983739080] [2021-12-06 20:44:32,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:32,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 20:44:32,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:32,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 20:44:32,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3395, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 20:44:32,673 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:33,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:33,222 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2021-12-06 20:44:33,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 20:44:33,222 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 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 55 [2021-12-06 20:44:33,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:33,222 INFO L225 Difference]: With dead ends: 107 [2021-12-06 20:44:33,222 INFO L226 Difference]: Without dead ends: 101 [2021-12-06 20:44:33,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1627, Invalid=4853, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 20:44:33,223 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 273 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:33,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 65 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-06 20:44:33,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2021-12-06 20:44:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-12-06 20:44:33,238 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 55 [2021-12-06 20:44:33,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:33,238 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-12-06 20:44:33,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:33,239 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-12-06 20:44:33,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 20:44:33,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:33,239 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:33,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 20:44:33,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:33,440 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1497316577, now seen corresponding path program 18 times [2021-12-06 20:44:33,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:33,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051182157] [2021-12-06 20:44:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:33,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:33,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:33,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051182157] [2021-12-06 20:44:33,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051182157] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:33,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71054729] [2021-12-06 20:44:33,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:44:33,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:33,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:33,841 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:33,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 20:44:33,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-06 20:44:33,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:33,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 20:44:33,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:34,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:34,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71054729] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:34,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:34,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 64 [2021-12-06 20:44:34,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634859980] [2021-12-06 20:44:34,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:34,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-06 20:44:34,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:34,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-06 20:44:34,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3269, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 20:44:34,940 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:35,697 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2021-12-06 20:44:35,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 20:44:35,697 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 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 57 [2021-12-06 20:44:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:35,698 INFO L225 Difference]: With dead ends: 119 [2021-12-06 20:44:35,698 INFO L226 Difference]: Without dead ends: 86 [2021-12-06 20:44:35,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2381 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1284, Invalid=4878, Unknown=0, NotChecked=0, Total=6162 [2021-12-06 20:44:35,699 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:35,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 125 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-06 20:44:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-12-06 20:44:35,711 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 20:44:35,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-12-06 20:44:35,712 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 57 [2021-12-06 20:44:35,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:35,712 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-12-06 20:44:35,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:35,712 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-12-06 20:44:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 20:44:35,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:35,713 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:35,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 20:44:35,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:35,914 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:35,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1622398209, now seen corresponding path program 18 times [2021-12-06 20:44:35,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:35,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976773558] [2021-12-06 20:44:35,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:35,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:36,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:36,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976773558] [2021-12-06 20:44:36,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976773558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:36,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578292301] [2021-12-06 20:44:36,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:44:36,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:36,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:36,346 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:36,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 20:44:36,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-06 20:44:36,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:36,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 20:44:36,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:37,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:37,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578292301] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:37,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:37,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 64 [2021-12-06 20:44:37,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769131637] [2021-12-06 20:44:37,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:37,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-06 20:44:37,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:37,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-06 20:44:37,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=3259, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 20:44:37,431 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:37,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:37,910 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-12-06 20:44:37,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 20:44:37,910 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 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 57 [2021-12-06 20:44:37,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:37,911 INFO L225 Difference]: With dead ends: 95 [2021-12-06 20:44:37,911 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 20:44:37,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1557, Invalid=4449, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 20:44:37,912 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 220 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:37,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 39 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:37,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 20:44:37,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-12-06 20:44:37,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:37,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2021-12-06 20:44:37,929 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 57 [2021-12-06 20:44:37,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:37,929 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2021-12-06 20:44:37,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:37,929 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2021-12-06 20:44:37,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 20:44:37,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:37,930 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:37,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 20:44:38,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:38,131 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:38,132 INFO L85 PathProgramCache]: Analyzing trace with hash 224354145, now seen corresponding path program 19 times [2021-12-06 20:44:38,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:38,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33395032] [2021-12-06 20:44:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:38,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:38,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:38,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33395032] [2021-12-06 20:44:38,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33395032] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:38,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746409465] [2021-12-06 20:44:38,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:44:38,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:38,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:38,553 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:38,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 20:44:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:38,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 20:44:38,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:39,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:39,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746409465] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:39,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:39,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 71 [2021-12-06 20:44:39,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692957088] [2021-12-06 20:44:39,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:39,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 20:44:39,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 20:44:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=4086, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 20:44:39,740 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 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 20:44:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:41,189 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2021-12-06 20:44:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 20:44:41,190 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 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 59 [2021-12-06 20:44:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:41,190 INFO L225 Difference]: With dead ends: 163 [2021-12-06 20:44:41,190 INFO L226 Difference]: Without dead ends: 128 [2021-12-06 20:44:41,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1584, Invalid=6426, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 20:44:41,191 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 169 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:41,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 120 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-06 20:44:41,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 90. [2021-12-06 20:44:41,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 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 20:44:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-12-06 20:44:41,208 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 59 [2021-12-06 20:44:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:41,208 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-12-06 20:44:41,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 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 20:44:41,208 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-12-06 20:44:41,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 20:44:41,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:41,208 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:41,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-06 20:44:41,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:41,409 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:41,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:41,410 INFO L85 PathProgramCache]: Analyzing trace with hash 497266717, now seen corresponding path program 19 times [2021-12-06 20:44:41,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:41,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189157045] [2021-12-06 20:44:41,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:41,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:41,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:41,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189157045] [2021-12-06 20:44:41,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189157045] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:41,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764947983] [2021-12-06 20:44:41,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:44:41,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:41,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:41,890 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:41,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 20:44:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:41,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 20:44:41,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:42,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:43,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764947983] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:43,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:43,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 70 [2021-12-06 20:44:43,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047658132] [2021-12-06 20:44:43,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:43,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 20:44:43,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 20:44:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=886, Invalid=3944, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 20:44:43,043 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 70 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 20:44:43,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:43,704 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2021-12-06 20:44:43,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 20:44:43,704 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 70 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 59 [2021-12-06 20:44:43,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:43,704 INFO L225 Difference]: With dead ends: 113 [2021-12-06 20:44:43,704 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 20:44:43,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3055 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1876, Invalid=5606, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 20:44:43,705 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 270 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:43,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 101 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:43,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 20:44:43,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2021-12-06 20:44:43,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 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 20:44:43,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-12-06 20:44:43,721 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 59 [2021-12-06 20:44:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:43,721 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-12-06 20:44:43,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 70 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 20:44:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-12-06 20:44:43,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 20:44:43,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:43,721 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:43,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 20:44:43,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:43,922 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:43,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:43,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1113957249, now seen corresponding path program 20 times [2021-12-06 20:44:43,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:43,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752002233] [2021-12-06 20:44:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:43,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 123 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:44,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:44,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752002233] [2021-12-06 20:44:44,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752002233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:44,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037061397] [2021-12-06 20:44:44,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:44:44,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:44,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:44,336 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:44,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 20:44:44,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:44:44,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:44,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 20:44:44,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:45,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:45,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037061397] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:45,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:45,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 69 [2021-12-06 20:44:45,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196155170] [2021-12-06 20:44:45,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:45,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-06 20:44:45,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:45,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-06 20:44:45,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=3808, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 20:44:45,540 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 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 20:44:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:46,395 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2021-12-06 20:44:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 20:44:46,396 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 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 61 [2021-12-06 20:44:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:46,396 INFO L225 Difference]: With dead ends: 127 [2021-12-06 20:44:46,396 INFO L226 Difference]: Without dead ends: 92 [2021-12-06 20:44:46,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2783 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1479, Invalid=5661, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 20:44:46,397 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 81 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:46,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 126 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-06 20:44:46,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-12-06 20:44:46,421 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 20:44:46,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2021-12-06 20:44:46,421 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 61 [2021-12-06 20:44:46,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:46,421 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2021-12-06 20:44:46,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 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 20:44:46,422 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2021-12-06 20:44:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 20:44:46,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:46,422 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:46,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-06 20:44:46,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:46,623 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:46,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1463485663, now seen corresponding path program 20 times [2021-12-06 20:44:46,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:46,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066036600] [2021-12-06 20:44:46,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:46,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 100 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:47,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:47,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066036600] [2021-12-06 20:44:47,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066036600] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:47,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895012710] [2021-12-06 20:44:47,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:44:47,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:47,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:47,116 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:47,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 20:44:47,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:44:47,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:47,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 20:44:47,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:47,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:48,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895012710] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:48,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:48,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 69 [2021-12-06 20:44:48,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832028073] [2021-12-06 20:44:48,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:48,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-06 20:44:48,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:48,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-06 20:44:48,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=895, Invalid=3797, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 20:44:48,286 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:48,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:48,794 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2021-12-06 20:44:48,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 20:44:48,794 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 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 61 [2021-12-06 20:44:48,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:48,795 INFO L225 Difference]: With dead ends: 101 [2021-12-06 20:44:48,795 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 20:44:48,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2897 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1802, Invalid=5170, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 20:44:48,796 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 130 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:48,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 70 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 20:44:48,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-12-06 20:44:48,811 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 20:44:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2021-12-06 20:44:48,811 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 61 [2021-12-06 20:44:48,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:48,812 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2021-12-06 20:44:48,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:48,812 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2021-12-06 20:44:48,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 20:44:48,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:48,812 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:48,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-06 20:44:49,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 20:44:49,013 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:49,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:49,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2063646399, now seen corresponding path program 21 times [2021-12-06 20:44:49,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:49,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767528742] [2021-12-06 20:44:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:49,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:49,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:49,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767528742] [2021-12-06 20:44:49,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767528742] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:49,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462170704] [2021-12-06 20:44:49,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:44:49,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:49,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:49,482 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:49,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 20:44:49,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-06 20:44:49,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:49,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 20:44:49,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:50,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:50,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462170704] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:50,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:50,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 76 [2021-12-06 20:44:50,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430551216] [2021-12-06 20:44:50,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:50,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-06 20:44:50,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:50,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-06 20:44:50,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1013, Invalid=4687, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 20:44:50,840 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:52,257 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2021-12-06 20:44:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 20:44:52,257 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 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 63 [2021-12-06 20:44:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:52,258 INFO L225 Difference]: With dead ends: 173 [2021-12-06 20:44:52,258 INFO L226 Difference]: Without dead ends: 136 [2021-12-06 20:44:52,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3531 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1797, Invalid=7323, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 20:44:52,258 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 341 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:52,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 106 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-06 20:44:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2021-12-06 20:44:52,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 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 20:44:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-12-06 20:44:52,275 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 63 [2021-12-06 20:44:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:52,275 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-12-06 20:44:52,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-12-06 20:44:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 20:44:52,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:52,276 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:52,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-06 20:44:52,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-06 20:44:52,477 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:52,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:52,478 INFO L85 PathProgramCache]: Analyzing trace with hash -14509443, now seen corresponding path program 21 times [2021-12-06 20:44:52,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:52,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445054255] [2021-12-06 20:44:52,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:52,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:53,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:53,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445054255] [2021-12-06 20:44:53,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445054255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:53,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040661736] [2021-12-06 20:44:53,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:44:53,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:53,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:53,023 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:53,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 20:44:53,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-06 20:44:53,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:53,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 20:44:53,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:53,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:54,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040661736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:54,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:54,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 75 [2021-12-06 20:44:54,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464410869] [2021-12-06 20:44:54,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:54,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-06 20:44:54,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:54,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-06 20:44:54,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=4534, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 20:44:54,395 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:54,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:54,996 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2021-12-06 20:44:54,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 20:44:54,996 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 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 63 [2021-12-06 20:44:54,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:54,997 INFO L225 Difference]: With dead ends: 119 [2021-12-06 20:44:54,997 INFO L226 Difference]: Without dead ends: 113 [2021-12-06 20:44:54,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3523 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2143, Invalid=6413, Unknown=0, NotChecked=0, Total=8556 [2021-12-06 20:44:54,998 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 314 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:54,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 69 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:54,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-06 20:44:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2021-12-06 20:44:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-12-06 20:44:55,017 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 63 [2021-12-06 20:44:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:55,018 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-12-06 20:44:55,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-12-06 20:44:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 20:44:55,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:55,018 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:55,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-06 20:44:55,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-06 20:44:55,219 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:55,220 INFO L85 PathProgramCache]: Analyzing trace with hash 990392031, now seen corresponding path program 22 times [2021-12-06 20:44:55,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:55,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603955480] [2021-12-06 20:44:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:55,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 146 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:55,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:55,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603955480] [2021-12-06 20:44:55,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603955480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:55,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972510414] [2021-12-06 20:44:55,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:44:55,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:55,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:55,689 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:55,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 20:44:55,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:44:55,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:55,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 20:44:55,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:56,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:57,008 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:57,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972510414] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:57,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:57,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 74 [2021-12-06 20:44:57,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810445440] [2021-12-06 20:44:57,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:57,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-06 20:44:57,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:57,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-06 20:44:57,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=4388, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 20:44:57,010 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:57,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:44:57,823 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2021-12-06 20:44:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 20:44:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 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 65 [2021-12-06 20:44:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:44:57,824 INFO L225 Difference]: With dead ends: 135 [2021-12-06 20:44:57,824 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 20:44:57,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3216 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1688, Invalid=6502, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 20:44:57,825 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:44:57,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 111 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:44:57,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 20:44:57,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-12-06 20:44:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 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 20:44:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2021-12-06 20:44:57,842 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 65 [2021-12-06 20:44:57,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:44:57,842 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2021-12-06 20:44:57,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:44:57,842 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2021-12-06 20:44:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 20:44:57,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:44:57,842 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:44:57,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-06 20:44:58,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 20:44:58,044 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:44:58,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:44:58,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2056259649, now seen corresponding path program 22 times [2021-12-06 20:44:58,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:44:58,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140100037] [2021-12-06 20:44:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:44:58,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:44:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:44:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 121 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:58,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:44:58,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140100037] [2021-12-06 20:44:58,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140100037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:44:58,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999802559] [2021-12-06 20:44:58,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:44:58,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:44:58,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:44:58,589 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:44:58,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 20:44:58,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:44:58,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:44:58,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 20:44:58,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:44:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:59,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:44:59,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999802559] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:44:59,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:44:59,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 74 [2021-12-06 20:44:59,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717892319] [2021-12-06 20:44:59,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:44:59,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-06 20:44:59,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:44:59,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-06 20:44:59,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=4376, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 20:44:59,876 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 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 20:45:00,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:00,507 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2021-12-06 20:45:00,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 20:45:00,507 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 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 65 [2021-12-06 20:45:00,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:00,508 INFO L225 Difference]: With dead ends: 107 [2021-12-06 20:45:00,508 INFO L226 Difference]: Without dead ends: 101 [2021-12-06 20:45:00,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3352 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2065, Invalid=5945, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 20:45:00,509 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 336 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:00,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 63 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:45:00,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-06 20:45:00,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-12-06 20:45:00,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2021-12-06 20:45:00,527 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 65 [2021-12-06 20:45:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:00,527 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2021-12-06 20:45:00,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 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 20:45:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2021-12-06 20:45:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 20:45:00,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:00,527 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:00,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-06 20:45:00,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:00,729 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:00,730 INFO L85 PathProgramCache]: Analyzing trace with hash -104661983, now seen corresponding path program 23 times [2021-12-06 20:45:00,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:00,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521782600] [2021-12-06 20:45:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:00,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:01,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:01,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521782600] [2021-12-06 20:45:01,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521782600] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:01,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823274339] [2021-12-06 20:45:01,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:45:01,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:01,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:01,237 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:01,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 20:45:01,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-06 20:45:01,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:01,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 20:45:01,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:02,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:02,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823274339] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:02,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:02,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 81 [2021-12-06 20:45:02,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714139949] [2021-12-06 20:45:02,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:02,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-06 20:45:02,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:02,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-06 20:45:02,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1151, Invalid=5329, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 20:45:02,848 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 81 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:04,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:04,202 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2021-12-06 20:45:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 20:45:04,203 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 0 states have call successors, (0), 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 67 [2021-12-06 20:45:04,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:04,203 INFO L225 Difference]: With dead ends: 183 [2021-12-06 20:45:04,203 INFO L226 Difference]: Without dead ends: 144 [2021-12-06 20:45:04,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4018 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2024, Invalid=8278, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 20:45:04,204 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 149 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:04,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 163 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:45:04,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-06 20:45:04,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2021-12-06 20:45:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 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 20:45:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-12-06 20:45:04,223 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 67 [2021-12-06 20:45:04,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:04,223 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-12-06 20:45:04,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-12-06 20:45:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 20:45:04,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:04,224 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:04,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 20:45:04,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:04,424 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash -500875811, now seen corresponding path program 23 times [2021-12-06 20:45:04,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:04,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755782915] [2021-12-06 20:45:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:04,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:04,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:04,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755782915] [2021-12-06 20:45:04,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755782915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:04,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991920217] [2021-12-06 20:45:04,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:45:04,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:04,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:04,969 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:04,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 20:45:04,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-06 20:45:04,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:04,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 20:45:04,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:05,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:06,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991920217] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:06,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:06,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 80 [2021-12-06 20:45:06,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275806169] [2021-12-06 20:45:06,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:06,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 20:45:06,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:06,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 20:45:06,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=5165, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 20:45:06,455 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 80 states, 80 states have (on average 1.9875) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:07,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:07,163 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2021-12-06 20:45:07,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 20:45:07,164 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 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 67 [2021-12-06 20:45:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:07,164 INFO L225 Difference]: With dead ends: 125 [2021-12-06 20:45:07,164 INFO L226 Difference]: Without dead ends: 119 [2021-12-06 20:45:07,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4024 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2428, Invalid=7274, Unknown=0, NotChecked=0, Total=9702 [2021-12-06 20:45:07,166 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 283 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:07,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 89 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:45:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-06 20:45:07,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2021-12-06 20:45:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 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 20:45:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-12-06 20:45:07,194 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 67 [2021-12-06 20:45:07,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:07,194 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-12-06 20:45:07,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:07,194 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-12-06 20:45:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 20:45:07,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:07,194 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:07,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-06 20:45:07,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-12-06 20:45:07,395 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:07,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:07,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1743747647, now seen corresponding path program 24 times [2021-12-06 20:45:07,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:07,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019931423] [2021-12-06 20:45:07,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:07,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 171 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:07,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:07,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019931423] [2021-12-06 20:45:07,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019931423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:07,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919905725] [2021-12-06 20:45:07,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:45:07,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:07,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:07,911 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:07,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 20:45:07,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-06 20:45:07,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:07,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 20:45:07,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:08,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:09,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919905725] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:09,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:09,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 79 [2021-12-06 20:45:09,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525354972] [2021-12-06 20:45:09,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:09,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-06 20:45:09,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:09,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-06 20:45:09,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=5009, Unknown=0, NotChecked=0, Total=6162 [2021-12-06 20:45:09,328 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:10,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:10,327 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2021-12-06 20:45:10,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 20:45:10,327 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 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 69 [2021-12-06 20:45:10,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:10,327 INFO L225 Difference]: With dead ends: 143 [2021-12-06 20:45:10,328 INFO L226 Difference]: Without dead ends: 104 [2021-12-06 20:45:10,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3680 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1911, Invalid=7401, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 20:45:10,328 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 80 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:10,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 132 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:45:10,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-06 20:45:10,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-12-06 20:45:10,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 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 20:45:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2021-12-06 20:45:10,348 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 69 [2021-12-06 20:45:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:10,348 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2021-12-06 20:45:10,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:10,348 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2021-12-06 20:45:10,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 20:45:10,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:10,348 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:10,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-06 20:45:10,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:10,550 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:10,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:10,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1306018719, now seen corresponding path program 24 times [2021-12-06 20:45:10,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:10,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727709593] [2021-12-06 20:45:10,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:10,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:11,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:11,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727709593] [2021-12-06 20:45:11,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727709593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:11,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224583068] [2021-12-06 20:45:11,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:45:11,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:11,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:11,147 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:11,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 20:45:11,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-06 20:45:11,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:11,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 20:45:11,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:12,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:12,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224583068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:12,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:12,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 79 [2021-12-06 20:45:12,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906862937] [2021-12-06 20:45:12,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:12,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-06 20:45:12,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:12,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-06 20:45:12,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=4996, Unknown=0, NotChecked=0, Total=6162 [2021-12-06 20:45:12,574 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 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 20:45:13,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:13,208 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2021-12-06 20:45:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 20:45:13,208 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 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) Word has length 69 [2021-12-06 20:45:13,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:13,209 INFO L225 Difference]: With dead ends: 113 [2021-12-06 20:45:13,209 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 20:45:13,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3840 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2346, Invalid=6774, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 20:45:13,210 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 312 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:13,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 38 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:45:13,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 20:45:13,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2021-12-06 20:45:13,230 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 20:45:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2021-12-06 20:45:13,231 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 69 [2021-12-06 20:45:13,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:13,231 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2021-12-06 20:45:13,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 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 20:45:13,231 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2021-12-06 20:45:13,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 20:45:13,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:13,232 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:13,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-06 20:45:13,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:13,432 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:13,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1229443073, now seen corresponding path program 25 times [2021-12-06 20:45:13,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:13,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046066715] [2021-12-06 20:45:13,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:13,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:13,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:13,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046066715] [2021-12-06 20:45:13,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046066715] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:13,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125300267] [2021-12-06 20:45:13,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:45:13,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:13,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:13,983 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:13,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 20:45:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:14,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 20:45:14,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:14,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:15,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125300267] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:15,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:15,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 86 [2021-12-06 20:45:15,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456107275] [2021-12-06 20:45:15,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:15,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-06 20:45:15,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:15,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-06 20:45:15,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1298, Invalid=6012, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 20:45:15,620 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:17,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:17,364 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2021-12-06 20:45:17,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 20:45:17,364 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 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 71 [2021-12-06 20:45:17,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:17,365 INFO L225 Difference]: With dead ends: 193 [2021-12-06 20:45:17,365 INFO L226 Difference]: Without dead ends: 152 [2021-12-06 20:45:17,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4536 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2265, Invalid=9291, Unknown=0, NotChecked=0, Total=11556 [2021-12-06 20:45:17,365 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 193 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:17,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 150 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:45:17,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-06 20:45:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 108. [2021-12-06 20:45:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 107 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:17,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-12-06 20:45:17,387 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 71 [2021-12-06 20:45:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:17,387 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-12-06 20:45:17,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-12-06 20:45:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 20:45:17,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:17,387 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:17,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-06 20:45:17,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-06 20:45:17,588 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:17,589 INFO L85 PathProgramCache]: Analyzing trace with hash 198236733, now seen corresponding path program 25 times [2021-12-06 20:45:17,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:17,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941563535] [2021-12-06 20:45:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:17,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:18,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:18,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941563535] [2021-12-06 20:45:18,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941563535] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:18,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126919097] [2021-12-06 20:45:18,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:45:18,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:18,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:18,215 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:18,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 20:45:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:18,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 20:45:18,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:19,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:19,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126919097] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:19,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:19,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 85 [2021-12-06 20:45:19,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890625769] [2021-12-06 20:45:19,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:19,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-06 20:45:19,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-06 20:45:19,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1303, Invalid=5837, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 20:45:19,766 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:20,523 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2021-12-06 20:45:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 20:45:20,523 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 0 states have call successors, (0), 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 71 [2021-12-06 20:45:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:20,524 INFO L225 Difference]: With dead ends: 131 [2021-12-06 20:45:20,524 INFO L226 Difference]: Without dead ends: 125 [2021-12-06 20:45:20,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4558 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2731, Invalid=8189, Unknown=0, NotChecked=0, Total=10920 [2021-12-06 20:45:20,524 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 266 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:20,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 121 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:45:20,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-06 20:45:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2021-12-06 20:45:20,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:20,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-12-06 20:45:20,549 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 71 [2021-12-06 20:45:20,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:20,550 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-12-06 20:45:20,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:20,550 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-12-06 20:45:20,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 20:45:20,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:20,550 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:20,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-06 20:45:20,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-06 20:45:20,751 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash -718963041, now seen corresponding path program 26 times [2021-12-06 20:45:20,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:20,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912517883] [2021-12-06 20:45:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:20,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 198 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:21,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:21,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912517883] [2021-12-06 20:45:21,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912517883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:21,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558697673] [2021-12-06 20:45:21,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:45:21,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:21,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:21,248 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:21,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-06 20:45:21,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:45:21,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:21,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 20:45:21,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:22,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:22,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558697673] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:22,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:22,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 84 [2021-12-06 20:45:22,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698042503] [2021-12-06 20:45:22,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:22,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-06 20:45:22,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:22,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-06 20:45:22,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1301, Invalid=5671, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 20:45:22,833 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 84 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:23,863 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2021-12-06 20:45:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 20:45:23,864 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 84 states have internal predecessors, (169), 0 states have call successors, (0), 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 73 [2021-12-06 20:45:23,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:23,864 INFO L225 Difference]: With dead ends: 151 [2021-12-06 20:45:23,864 INFO L226 Difference]: Without dead ends: 110 [2021-12-06 20:45:23,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4175 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2148, Invalid=8358, Unknown=0, NotChecked=0, Total=10506 [2021-12-06 20:45:23,865 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 109 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:23,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 118 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:45:23,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-06 20:45:23,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-12-06 20:45:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2021-12-06 20:45:23,889 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 73 [2021-12-06 20:45:23,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:23,889 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2021-12-06 20:45:23,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 84 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2021-12-06 20:45:23,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 20:45:23,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:23,890 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:23,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-06 20:45:24,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-06 20:45:24,091 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:24,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:24,092 INFO L85 PathProgramCache]: Analyzing trace with hash 2052139135, now seen corresponding path program 26 times [2021-12-06 20:45:24,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:24,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093102752] [2021-12-06 20:45:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:24,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 169 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:24,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:24,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093102752] [2021-12-06 20:45:24,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093102752] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:24,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615042041] [2021-12-06 20:45:24,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:45:24,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:24,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:24,764 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:24,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-06 20:45:24,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:45:24,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:24,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 20:45:24,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:25,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:26,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615042041] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:26,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:26,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 84 [2021-12-06 20:45:26,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302224219] [2021-12-06 20:45:26,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:26,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-06 20:45:26,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:26,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-06 20:45:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1315, Invalid=5657, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 20:45:26,313 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 84 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:27,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:27,027 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2021-12-06 20:45:27,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 20:45:27,028 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 84 states have internal predecessors, (171), 0 states have call successors, (0), 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 73 [2021-12-06 20:45:27,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:27,028 INFO L225 Difference]: With dead ends: 119 [2021-12-06 20:45:27,028 INFO L226 Difference]: Without dead ends: 113 [2021-12-06 20:45:27,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4361 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2645, Invalid=7657, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 20:45:27,029 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 232 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:27,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 70 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:45:27,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-06 20:45:27,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-12-06 20:45:27,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 110 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2021-12-06 20:45:27,051 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 73 [2021-12-06 20:45:27,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:27,052 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2021-12-06 20:45:27,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 84 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:27,052 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2021-12-06 20:45:27,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 20:45:27,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:27,052 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:27,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-06 20:45:27,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-06 20:45:27,253 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:27,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:27,254 INFO L85 PathProgramCache]: Analyzing trace with hash 991624417, now seen corresponding path program 27 times [2021-12-06 20:45:27,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:27,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407458599] [2021-12-06 20:45:27,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:27,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:27,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:27,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407458599] [2021-12-06 20:45:27,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407458599] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:27,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606454770] [2021-12-06 20:45:27,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:45:27,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:27,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:27,827 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:27,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-06 20:45:27,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-06 20:45:27,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:27,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 20:45:27,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:28,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:29,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606454770] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:29,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:29,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 91 [2021-12-06 20:45:29,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378561160] [2021-12-06 20:45:29,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:29,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-06 20:45:29,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-06 20:45:29,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1454, Invalid=6736, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 20:45:29,672 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 91 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:31,532 INFO L93 Difference]: Finished difference Result 203 states and 208 transitions. [2021-12-06 20:45:31,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 20:45:31,532 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-06 20:45:31,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:31,533 INFO L225 Difference]: With dead ends: 203 [2021-12-06 20:45:31,533 INFO L226 Difference]: Without dead ends: 160 [2021-12-06 20:45:31,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5085 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2520, Invalid=10362, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 20:45:31,534 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 248 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:31,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 152 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:45:31,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-06 20:45:31,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 114. [2021-12-06 20:45:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 113 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 20:45:31,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2021-12-06 20:45:31,561 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 75 [2021-12-06 20:45:31,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:31,561 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2021-12-06 20:45:31,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:31,561 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2021-12-06 20:45:31,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 20:45:31,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:31,562 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:31,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-12-06 20:45:31,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-06 20:45:31,763 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:31,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:31,764 INFO L85 PathProgramCache]: Analyzing trace with hash -382029923, now seen corresponding path program 27 times [2021-12-06 20:45:31,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:31,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871003209] [2021-12-06 20:45:31,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:31,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:32,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:32,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871003209] [2021-12-06 20:45:32,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871003209] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:32,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13344890] [2021-12-06 20:45:32,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:45:32,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:32,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:32,461 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:32,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-06 20:45:32,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-06 20:45:32,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:32,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 20:45:32,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:33,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:34,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13344890] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:34,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:34,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 90 [2021-12-06 20:45:34,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467193991] [2021-12-06 20:45:34,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:34,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-12-06 20:45:34,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:34,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-12-06 20:45:34,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=6550, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 20:45:34,177 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:34,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:34,945 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2021-12-06 20:45:34,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 20:45:34,945 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-06 20:45:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:34,945 INFO L225 Difference]: With dead ends: 137 [2021-12-06 20:45:34,946 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 20:45:34,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5125 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3052, Invalid=9158, Unknown=0, NotChecked=0, Total=12210 [2021-12-06 20:45:34,946 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 234 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:34,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 79 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:45:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 20:45:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 116. [2021-12-06 20:45:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 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 20:45:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-12-06 20:45:34,973 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 75 [2021-12-06 20:45:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:34,974 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-12-06 20:45:34,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:34,974 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-12-06 20:45:34,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 20:45:34,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:34,974 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:34,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-12-06 20:45:35,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:35,175 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:35,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:35,176 INFO L85 PathProgramCache]: Analyzing trace with hash -9470977, now seen corresponding path program 28 times [2021-12-06 20:45:35,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:35,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654108882] [2021-12-06 20:45:35,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:35,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 227 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:35,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:35,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654108882] [2021-12-06 20:45:35,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654108882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:35,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998525881] [2021-12-06 20:45:35,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:45:35,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:35,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:35,729 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:35,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-06 20:45:35,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:45:35,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:35,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 20:45:35,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:36,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:37,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998525881] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:37,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:37,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 89 [2021-12-06 20:45:37,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264073738] [2021-12-06 20:45:37,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:37,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-06 20:45:37,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-06 20:45:37,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1458, Invalid=6374, Unknown=0, NotChecked=0, Total=7832 [2021-12-06 20:45:37,424 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 89 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:38,583 INFO L93 Difference]: Finished difference Result 159 states and 163 transitions. [2021-12-06 20:45:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 20:45:38,584 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 89 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-06 20:45:38,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:38,584 INFO L225 Difference]: With dead ends: 159 [2021-12-06 20:45:38,584 INFO L226 Difference]: Without dead ends: 116 [2021-12-06 20:45:38,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4701 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2399, Invalid=9373, Unknown=0, NotChecked=0, Total=11772 [2021-12-06 20:45:38,585 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 86 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:38,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 113 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:45:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-06 20:45:38,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-12-06 20:45:38,609 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 20:45:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2021-12-06 20:45:38,610 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 77 [2021-12-06 20:45:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:38,610 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2021-12-06 20:45:38,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 89 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2021-12-06 20:45:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 20:45:38,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:38,610 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:38,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-12-06 20:45:38,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:38,811 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:38,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:38,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1633163681, now seen corresponding path program 28 times [2021-12-06 20:45:38,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:38,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464750628] [2021-12-06 20:45:38,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:38,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 196 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:39,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:39,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464750628] [2021-12-06 20:45:39,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464750628] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:39,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971504079] [2021-12-06 20:45:39,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:45:39,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:39,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:39,540 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:39,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-06 20:45:39,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:45:39,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:39,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 20:45:39,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:40,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:41,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971504079] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:41,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:41,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 89 [2021-12-06 20:45:41,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829843589] [2021-12-06 20:45:41,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:41,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-06 20:45:41,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:41,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-06 20:45:41,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1473, Invalid=6359, Unknown=0, NotChecked=0, Total=7832 [2021-12-06 20:45:41,253 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:42,069 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2021-12-06 20:45:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 20:45:42,070 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 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 77 [2021-12-06 20:45:42,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:42,070 INFO L225 Difference]: With dead ends: 125 [2021-12-06 20:45:42,070 INFO L226 Difference]: Without dead ends: 119 [2021-12-06 20:45:42,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 99 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4915 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2962, Invalid=8594, Unknown=0, NotChecked=0, Total=11556 [2021-12-06 20:45:42,071 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 237 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:42,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 88 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:45:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-06 20:45:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-12-06 20:45:42,096 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 20:45:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2021-12-06 20:45:42,097 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 77 [2021-12-06 20:45:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:42,097 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2021-12-06 20:45:42,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2021-12-06 20:45:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 20:45:42,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:42,097 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:42,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-12-06 20:45:42,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:42,298 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:42,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1531329855, now seen corresponding path program 29 times [2021-12-06 20:45:42,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:42,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383063903] [2021-12-06 20:45:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:42,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:42,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:42,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383063903] [2021-12-06 20:45:42,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383063903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:42,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234157861] [2021-12-06 20:45:42,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:45:42,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:42,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:42,898 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:42,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-06 20:45:42,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-12-06 20:45:42,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:42,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 20:45:42,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:44,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:44,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234157861] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:44,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:44,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 96 [2021-12-06 20:45:44,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413706068] [2021-12-06 20:45:44,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:44,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-06 20:45:44,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:44,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-06 20:45:44,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1619, Invalid=7501, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 20:45:44,867 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:46,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:46,746 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2021-12-06 20:45:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 20:45:46,747 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 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 79 [2021-12-06 20:45:46,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:46,747 INFO L225 Difference]: With dead ends: 213 [2021-12-06 20:45:46,747 INFO L226 Difference]: Without dead ends: 168 [2021-12-06 20:45:46,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5665 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2789, Invalid=11491, Unknown=0, NotChecked=0, Total=14280 [2021-12-06 20:45:46,748 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 204 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:46,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 176 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:45:46,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-06 20:45:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 120. [2021-12-06 20:45:46,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 119 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:46,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2021-12-06 20:45:46,776 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 79 [2021-12-06 20:45:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:46,777 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2021-12-06 20:45:46,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2021-12-06 20:45:46,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 20:45:46,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:46,777 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:46,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-06 20:45:46,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:46,979 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:46,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:46,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1285030403, now seen corresponding path program 29 times [2021-12-06 20:45:46,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:46,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613616699] [2021-12-06 20:45:46,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:46,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:47,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:47,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613616699] [2021-12-06 20:45:47,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613616699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:47,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810790369] [2021-12-06 20:45:47,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:45:47,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:47,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:47,730 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:47,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-06 20:45:47,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-12-06 20:45:47,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:47,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 20:45:47,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:48,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:49,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810790369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:49,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:49,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 95 [2021-12-06 20:45:49,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273169309] [2021-12-06 20:45:49,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:49,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-06 20:45:49,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-06 20:45:49,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1626, Invalid=7304, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 20:45:49,529 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:50,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:50,447 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2021-12-06 20:45:50,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 20:45:50,447 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 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 79 [2021-12-06 20:45:50,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:50,448 INFO L225 Difference]: With dead ends: 143 [2021-12-06 20:45:50,448 INFO L226 Difference]: Without dead ends: 137 [2021-12-06 20:45:50,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5725 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3391, Invalid=10181, Unknown=0, NotChecked=0, Total=13572 [2021-12-06 20:45:50,449 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 286 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:50,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 105 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:45:50,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-06 20:45:50,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 122. [2021-12-06 20:45:50,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 121 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:50,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-12-06 20:45:50,477 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 79 [2021-12-06 20:45:50,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:50,477 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-12-06 20:45:50,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:50,477 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-12-06 20:45:50,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 20:45:50,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:50,478 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:50,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-12-06 20:45:50,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:50,679 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:50,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:50,680 INFO L85 PathProgramCache]: Analyzing trace with hash -209538465, now seen corresponding path program 30 times [2021-12-06 20:45:50,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:50,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680686713] [2021-12-06 20:45:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:50,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 258 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:51,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:51,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680686713] [2021-12-06 20:45:51,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680686713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:51,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448646683] [2021-12-06 20:45:51,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:45:51,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:51,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:51,283 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:51,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-06 20:45:51,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-12-06 20:45:51,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:51,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 20:45:51,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:52,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:53,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448646683] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:53,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:53,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 94 [2021-12-06 20:45:53,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512509899] [2021-12-06 20:45:53,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:53,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-06 20:45:53,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:53,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-06 20:45:53,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1624, Invalid=7118, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 20:45:53,136 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 94 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:54,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:54,440 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2021-12-06 20:45:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 20:45:54,440 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 94 states have internal predecessors, (189), 0 states have call successors, (0), 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 81 [2021-12-06 20:45:54,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:54,440 INFO L225 Difference]: With dead ends: 167 [2021-12-06 20:45:54,441 INFO L226 Difference]: Without dead ends: 122 [2021-12-06 20:45:54,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5258 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2664, Invalid=10446, Unknown=0, NotChecked=0, Total=13110 [2021-12-06 20:45:54,441 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 95 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:54,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 128 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:45:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-06 20:45:54,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-12-06 20:45:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2021-12-06 20:45:54,470 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 81 [2021-12-06 20:45:54,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:54,470 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2021-12-06 20:45:54,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 94 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:54,470 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2021-12-06 20:45:54,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 20:45:54,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:54,470 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:54,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-12-06 20:45:54,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-06 20:45:54,671 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:54,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:54,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1016708415, now seen corresponding path program 30 times [2021-12-06 20:45:54,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:54,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146579326] [2021-12-06 20:45:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:54,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 225 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:55,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:55,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146579326] [2021-12-06 20:45:55,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146579326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:55,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119539423] [2021-12-06 20:45:55,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:45:55,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:55,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:55,450 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:55,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-06 20:45:55,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-12-06 20:45:55,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:55,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 20:45:55,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:56,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:57,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119539423] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:57,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:57,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 94 [2021-12-06 20:45:57,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222066790] [2021-12-06 20:45:57,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:57,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-06 20:45:57,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:57,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-06 20:45:57,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1640, Invalid=7102, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 20:45:57,279 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 94 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:58,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:58,165 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2021-12-06 20:45:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 20:45:58,165 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 94 states have internal predecessors, (191), 0 states have call successors, (0), 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 81 [2021-12-06 20:45:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:58,166 INFO L225 Difference]: With dead ends: 131 [2021-12-06 20:45:58,166 INFO L226 Difference]: Without dead ends: 125 [2021-12-06 20:45:58,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5502 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3297, Invalid=9585, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 20:45:58,167 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 311 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:58,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 70 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:45:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-06 20:45:58,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-12-06 20:45:58,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:58,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2021-12-06 20:45:58,195 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 81 [2021-12-06 20:45:58,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:58,195 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2021-12-06 20:45:58,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 94 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:58,195 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2021-12-06 20:45:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 20:45:58,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:58,195 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:58,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-12-06 20:45:58,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-06 20:45:58,397 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:58,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1919852127, now seen corresponding path program 31 times [2021-12-06 20:45:58,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:58,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39800813] [2021-12-06 20:45:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:58,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:59,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:59,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39800813] [2021-12-06 20:45:59,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39800813] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:59,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099142018] [2021-12-06 20:45:59,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:45:59,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:59,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:59,079 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:59,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-06 20:45:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:59,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 20:45:59,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:00,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:01,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099142018] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:01,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:01,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 101 [2021-12-06 20:46:01,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307308568] [2021-12-06 20:46:01,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:01,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-06 20:46:01,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:01,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-06 20:46:01,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1793, Invalid=8307, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 20:46:01,296 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 101 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 101 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:46:03,370 INFO L93 Difference]: Finished difference Result 223 states and 228 transitions. [2021-12-06 20:46:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 20:46:03,370 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 101 states have internal predecessors, (199), 0 states have call successors, (0), 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 83 [2021-12-06 20:46:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:46:03,371 INFO L225 Difference]: With dead ends: 223 [2021-12-06 20:46:03,371 INFO L226 Difference]: Without dead ends: 176 [2021-12-06 20:46:03,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6276 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3072, Invalid=12678, Unknown=0, NotChecked=0, Total=15750 [2021-12-06 20:46:03,372 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 295 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:46:03,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 117 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:46:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-06 20:46:03,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2021-12-06 20:46:03,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-12-06 20:46:03,400 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 83 [2021-12-06 20:46:03,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:46:03,400 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-12-06 20:46:03,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 101 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:03,401 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-12-06 20:46:03,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 20:46:03,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:46:03,401 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:46:03,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-06 20:46:03,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:03,602 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:46:03,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:46:03,603 INFO L85 PathProgramCache]: Analyzing trace with hash 323880285, now seen corresponding path program 31 times [2021-12-06 20:46:03,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:46:03,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567614866] [2021-12-06 20:46:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:46:03,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:46:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:04,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:46:04,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567614866] [2021-12-06 20:46:04,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567614866] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:46:04,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939740021] [2021-12-06 20:46:04,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:46:04,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:04,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:46:04,447 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:46:04,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-06 20:46:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:04,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 20:46:04,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:05,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:06,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939740021] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:06,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:06,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 100 [2021-12-06 20:46:06,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104258654] [2021-12-06 20:46:06,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:06,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-06 20:46:06,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:06,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-06 20:46:06,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1801, Invalid=8099, Unknown=0, NotChecked=0, Total=9900 [2021-12-06 20:46:06,505 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 100 states, 100 states have (on average 1.99) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:07,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:46:07,518 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2021-12-06 20:46:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 20:46:07,518 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 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 83 [2021-12-06 20:46:07,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:46:07,519 INFO L225 Difference]: With dead ends: 149 [2021-12-06 20:46:07,519 INFO L226 Difference]: Without dead ends: 143 [2021-12-06 20:46:07,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6358 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3748, Invalid=11258, Unknown=0, NotChecked=0, Total=15006 [2021-12-06 20:46:07,520 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 329 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:46:07,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 119 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:46:07,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-06 20:46:07,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 128. [2021-12-06 20:46:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 127 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 20:46:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2021-12-06 20:46:07,554 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 83 [2021-12-06 20:46:07,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:46:07,554 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2021-12-06 20:46:07,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:07,554 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2021-12-06 20:46:07,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 20:46:07,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:46:07,555 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:46:07,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-12-06 20:46:07,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-06 20:46:07,756 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:46:07,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:46:07,757 INFO L85 PathProgramCache]: Analyzing trace with hash -234593857, now seen corresponding path program 32 times [2021-12-06 20:46:07,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:46:07,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191972096] [2021-12-06 20:46:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:46:07,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:46:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 291 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:08,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:46:08,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191972096] [2021-12-06 20:46:08,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191972096] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:46:08,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787774266] [2021-12-06 20:46:08,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:46:08,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:08,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:46:08,439 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:46:08,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-06 20:46:08,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:46:08,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:46:08,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 20:46:08,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:09,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:10,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787774266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:10,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:10,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 99 [2021-12-06 20:46:10,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545677766] [2021-12-06 20:46:10,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:10,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-06 20:46:10,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:10,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-06 20:46:10,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1799, Invalid=7903, Unknown=0, NotChecked=0, Total=9702 [2021-12-06 20:46:10,496 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:11,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:46:11,806 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2021-12-06 20:46:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 20:46:11,806 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 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 85 [2021-12-06 20:46:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:46:11,807 INFO L225 Difference]: With dead ends: 175 [2021-12-06 20:46:11,807 INFO L226 Difference]: Without dead ends: 128 [2021-12-06 20:46:11,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5846 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2943, Invalid=11577, Unknown=0, NotChecked=0, Total=14520 [2021-12-06 20:46:11,808 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 177 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:46:11,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 61 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:46:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-06 20:46:11,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-12-06 20:46:11,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:11,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2021-12-06 20:46:11,838 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 85 [2021-12-06 20:46:11,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:46:11,838 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2021-12-06 20:46:11,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2021-12-06 20:46:11,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 20:46:11,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:46:11,839 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:46:11,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-12-06 20:46:12,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-06 20:46:12,040 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:46:12,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:46:12,040 INFO L85 PathProgramCache]: Analyzing trace with hash -405541601, now seen corresponding path program 32 times [2021-12-06 20:46:12,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:46:12,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959612799] [2021-12-06 20:46:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:46:12,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:46:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 256 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:12,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:46:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959612799] [2021-12-06 20:46:12,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959612799] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:46:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440926921] [2021-12-06 20:46:12,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:46:12,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:12,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:46:12,865 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:46:12,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-06 20:46:12,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:46:12,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:46:12,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 20:46:12,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:14,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:14,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440926921] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:14,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:14,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 99 [2021-12-06 20:46:14,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315083497] [2021-12-06 20:46:14,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:14,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-06 20:46:14,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:14,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-06 20:46:14,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1816, Invalid=7886, Unknown=0, NotChecked=0, Total=9702 [2021-12-06 20:46:14,911 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:46:15,816 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2021-12-06 20:46:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 20:46:15,817 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 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 85 [2021-12-06 20:46:15,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:46:15,817 INFO L225 Difference]: With dead ends: 137 [2021-12-06 20:46:15,817 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 20:46:15,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6122 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3650, Invalid=10630, Unknown=0, NotChecked=0, Total=14280 [2021-12-06 20:46:15,818 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 428 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:46:15,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 56 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:46:15,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 20:46:15,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2021-12-06 20:46:15,849 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 20:46:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2021-12-06 20:46:15,849 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 85 [2021-12-06 20:46:15,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:46:15,849 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2021-12-06 20:46:15,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:15,849 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2021-12-06 20:46:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 20:46:15,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:46:15,850 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:46:15,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-12-06 20:46:16,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:16,051 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:46:16,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:46:16,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1392449921, now seen corresponding path program 33 times [2021-12-06 20:46:16,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:46:16,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879282722] [2021-12-06 20:46:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:46:16,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:46:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:16,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:46:16,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879282722] [2021-12-06 20:46:16,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879282722] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:46:16,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409280141] [2021-12-06 20:46:16,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:46:16,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:16,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:46:16,842 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:46:16,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-06 20:46:16,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-06 20:46:16,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:46:16,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 20:46:16,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:18,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:19,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409280141] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:19,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:19,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 106 [2021-12-06 20:46:19,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616999325] [2021-12-06 20:46:19,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:19,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-12-06 20:46:19,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:19,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-12-06 20:46:19,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1976, Invalid=9154, Unknown=0, NotChecked=0, Total=11130 [2021-12-06 20:46:19,191 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:46:21,441 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2021-12-06 20:46:21,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 20:46:21,442 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 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 87 [2021-12-06 20:46:21,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:46:21,442 INFO L225 Difference]: With dead ends: 233 [2021-12-06 20:46:21,442 INFO L226 Difference]: Without dead ends: 184 [2021-12-06 20:46:21,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6918 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3369, Invalid=13923, Unknown=0, NotChecked=0, Total=17292 [2021-12-06 20:46:21,443 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 197 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:46:21,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 195 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:46:21,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-06 20:46:21,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 132. [2021-12-06 20:46:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 131 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:21,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2021-12-06 20:46:21,480 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 87 [2021-12-06 20:46:21,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:46:21,480 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2021-12-06 20:46:21,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2021-12-06 20:46:21,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 20:46:21,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:46:21,481 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:46:21,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-12-06 20:46:21,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-12-06 20:46:21,682 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:46:21,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:46:21,682 INFO L85 PathProgramCache]: Analyzing trace with hash -976091715, now seen corresponding path program 33 times [2021-12-06 20:46:21,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:46:21,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831635900] [2021-12-06 20:46:21,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:46:21,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:46:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:22,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:46:22,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831635900] [2021-12-06 20:46:22,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831635900] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:46:22,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280435293] [2021-12-06 20:46:22,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:46:22,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:22,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:46:22,535 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:46:22,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-06 20:46:22,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-06 20:46:22,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:46:22,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 20:46:22,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:23,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:24,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280435293] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:24,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:24,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 105 [2021-12-06 20:46:24,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662025813] [2021-12-06 20:46:24,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:24,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-06 20:46:24,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:24,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-06 20:46:24,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1985, Invalid=8935, Unknown=0, NotChecked=0, Total=10920 [2021-12-06 20:46:24,650 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:46:25,740 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2021-12-06 20:46:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 20:46:25,741 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 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 87 [2021-12-06 20:46:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:46:25,741 INFO L225 Difference]: With dead ends: 155 [2021-12-06 20:46:25,741 INFO L226 Difference]: Without dead ends: 149 [2021-12-06 20:46:25,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7024 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4123, Invalid=12389, Unknown=0, NotChecked=0, Total=16512 [2021-12-06 20:46:25,742 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 297 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:46:25,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 126 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:46:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-06 20:46:25,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 134. [2021-12-06 20:46:25,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.037593984962406) internal successors, (138), 133 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 20:46:25,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2021-12-06 20:46:25,775 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 87 [2021-12-06 20:46:25,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:46:25,775 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2021-12-06 20:46:25,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:25,776 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2021-12-06 20:46:25,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 20:46:25,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:46:25,776 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:46:25,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-12-06 20:46:25,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:25,977 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:46:25,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:46:25,978 INFO L85 PathProgramCache]: Analyzing trace with hash 327797279, now seen corresponding path program 34 times [2021-12-06 20:46:25,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:46:25,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140195752] [2021-12-06 20:46:25,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:46:25,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:46:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 326 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:26,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:46:26,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140195752] [2021-12-06 20:46:26,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140195752] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:46:26,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107816952] [2021-12-06 20:46:26,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:46:26,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:26,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:46:26,671 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:46:26,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-06 20:46:26,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:46:26,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:46:26,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 20:46:26,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:27,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:29,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107816952] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:29,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:29,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 104 [2021-12-06 20:46:29,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070769291] [2021-12-06 20:46:29,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:29,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-06 20:46:29,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:29,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-06 20:46:29,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1983, Invalid=8729, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 20:46:29,022 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 104 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:30,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:46:30,626 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2021-12-06 20:46:30,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 20:46:30,626 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 104 states have internal predecessors, (209), 0 states have call successors, (0), 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 89 [2021-12-06 20:46:30,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:46:30,627 INFO L225 Difference]: With dead ends: 183 [2021-12-06 20:46:30,627 INFO L226 Difference]: Without dead ends: 134 [2021-12-06 20:46:30,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6465 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3236, Invalid=12766, Unknown=0, NotChecked=0, Total=16002 [2021-12-06 20:46:30,629 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 147 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:46:30,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 132 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:46:30,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-06 20:46:30,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-12-06 20:46:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 132 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2021-12-06 20:46:30,678 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 89 [2021-12-06 20:46:30,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:46:30,678 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2021-12-06 20:46:30,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 104 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:30,678 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2021-12-06 20:46:30,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 20:46:30,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:46:30,679 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:46:30,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-12-06 20:46:30,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:30,879 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:46:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:46:30,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1777579519, now seen corresponding path program 34 times [2021-12-06 20:46:30,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:46:30,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55325468] [2021-12-06 20:46:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:46:30,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:46:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 289 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:31,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:46:31,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55325468] [2021-12-06 20:46:31,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55325468] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:46:31,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611275350] [2021-12-06 20:46:31,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:46:31,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:31,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:46:31,797 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:46:31,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-06 20:46:31,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:46:31,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:46:31,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 20:46:31,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:33,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:33,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611275350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:33,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:33,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 104 [2021-12-06 20:46:33,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036216939] [2021-12-06 20:46:33,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:33,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-06 20:46:33,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:33,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-06 20:46:33,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2001, Invalid=8711, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 20:46:33,846 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:34,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:46:34,872 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2021-12-06 20:46:34,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 20:46:34,872 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-06 20:46:34,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:46:34,873 INFO L225 Difference]: With dead ends: 143 [2021-12-06 20:46:34,873 INFO L226 Difference]: Without dead ends: 137 [2021-12-06 20:46:34,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6775 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4021, Invalid=11729, Unknown=0, NotChecked=0, Total=15750 [2021-12-06 20:46:34,875 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 286 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:46:34,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 89 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:46:34,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-06 20:46:34,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-12-06 20:46:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 134 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 20:46:34,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2021-12-06 20:46:34,913 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 89 [2021-12-06 20:46:34,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:46:34,913 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2021-12-06 20:46:34,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:34,913 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2021-12-06 20:46:34,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 20:46:34,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:46:34,914 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:46:34,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-12-06 20:46:35,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-12-06 20:46:35,115 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:46:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:46:35,116 INFO L85 PathProgramCache]: Analyzing trace with hash -867161503, now seen corresponding path program 35 times [2021-12-06 20:46:35,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:46:35,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332545294] [2021-12-06 20:46:35,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:46:35,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:46:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:35,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:46:35,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332545294] [2021-12-06 20:46:35,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332545294] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:46:35,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222219993] [2021-12-06 20:46:35,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:46:35,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:35,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:46:35,895 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:46:35,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-06 20:46:35,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-06 20:46:35,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:46:35,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 20:46:35,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:37,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:38,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222219993] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:38,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:38,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 111 [2021-12-06 20:46:38,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620604125] [2021-12-06 20:46:38,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:38,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-12-06 20:46:38,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:38,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-12-06 20:46:38,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2168, Invalid=10042, Unknown=0, NotChecked=0, Total=12210 [2021-12-06 20:46:38,307 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:40,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:46:40,806 INFO L93 Difference]: Finished difference Result 243 states and 248 transitions. [2021-12-06 20:46:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 20:46:40,806 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 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 91 [2021-12-06 20:46:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:46:40,807 INFO L225 Difference]: With dead ends: 243 [2021-12-06 20:46:40,807 INFO L226 Difference]: Without dead ends: 192 [2021-12-06 20:46:40,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7591 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3680, Invalid=15226, Unknown=0, NotChecked=0, Total=18906 [2021-12-06 20:46:40,808 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 206 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:46:40,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 212 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:46:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-06 20:46:40,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 138. [2021-12-06 20:46:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2021-12-06 20:46:40,845 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 91 [2021-12-06 20:46:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:46:40,845 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2021-12-06 20:46:40,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:40,846 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2021-12-06 20:46:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 20:46:40,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:46:40,846 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:46:40,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-12-06 20:46:41,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:41,047 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:46:41,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:46:41,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1070153501, now seen corresponding path program 35 times [2021-12-06 20:46:41,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:46:41,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653756150] [2021-12-06 20:46:41,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:46:41,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:46:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:42,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:46:42,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653756150] [2021-12-06 20:46:42,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653756150] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:46:42,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086177839] [2021-12-06 20:46:42,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:46:42,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:42,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:46:42,040 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:46:42,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-06 20:46:42,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-06 20:46:42,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:46:42,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 20:46:42,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:43,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:44,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086177839] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:44,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:44,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 110 [2021-12-06 20:46:44,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966561877] [2021-12-06 20:46:44,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:44,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-06 20:46:44,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-06 20:46:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2178, Invalid=9812, Unknown=0, NotChecked=0, Total=11990 [2021-12-06 20:46:44,291 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:45,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:46:45,413 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2021-12-06 20:46:45,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 20:46:45,413 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 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 91 [2021-12-06 20:46:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:46:45,414 INFO L225 Difference]: With dead ends: 161 [2021-12-06 20:46:45,414 INFO L226 Difference]: Without dead ends: 155 [2021-12-06 20:46:45,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7723 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4516, Invalid=13574, Unknown=0, NotChecked=0, Total=18090 [2021-12-06 20:46:45,415 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 274 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:46:45,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 118 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:46:45,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-06 20:46:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2021-12-06 20:46:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 139 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 20:46:45,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2021-12-06 20:46:45,453 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 91 [2021-12-06 20:46:45,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:46:45,453 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2021-12-06 20:46:45,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:45,453 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2021-12-06 20:46:45,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 20:46:45,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:46:45,454 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:46:45,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-12-06 20:46:45,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:45,655 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:46:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:46:45,656 INFO L85 PathProgramCache]: Analyzing trace with hash -325571713, now seen corresponding path program 36 times [2021-12-06 20:46:45,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:46:45,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432901370] [2021-12-06 20:46:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:46:45,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:46:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 363 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:46,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:46:46,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432901370] [2021-12-06 20:46:46,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432901370] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:46:46,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865957303] [2021-12-06 20:46:46,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:46:46,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:46,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:46:46,420 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:46:46,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-06 20:46:46,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-06 20:46:46,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:46:46,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 20:46:46,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:47,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:48,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865957303] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:48,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:48,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 109 [2021-12-06 20:46:48,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486847596] [2021-12-06 20:46:48,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:48,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-06 20:46:48,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:48,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-06 20:46:48,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2176, Invalid=9596, Unknown=0, NotChecked=0, Total=11772 [2021-12-06 20:46:48,774 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 109 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:50,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:46:50,407 INFO L93 Difference]: Finished difference Result 191 states and 195 transitions. [2021-12-06 20:46:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 20:46:50,408 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 109 states have internal predecessors, (219), 0 states have call successors, (0), 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 93 [2021-12-06 20:46:50,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:46:50,408 INFO L225 Difference]: With dead ends: 191 [2021-12-06 20:46:50,408 INFO L226 Difference]: Without dead ends: 140 [2021-12-06 20:46:50,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7115 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3543, Invalid=14013, Unknown=0, NotChecked=0, Total=17556 [2021-12-06 20:46:50,409 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 104 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:46:50,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 146 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:46:50,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-06 20:46:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-12-06 20:46:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 138 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2021-12-06 20:46:50,449 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 93 [2021-12-06 20:46:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:46:50,449 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2021-12-06 20:46:50,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 109 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2021-12-06 20:46:50,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 20:46:50,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:46:50,450 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:46:50,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-12-06 20:46:50,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-12-06 20:46:50,651 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:46:50,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:46:50,652 INFO L85 PathProgramCache]: Analyzing trace with hash -427403297, now seen corresponding path program 36 times [2021-12-06 20:46:50,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:46:50,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133127688] [2021-12-06 20:46:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:46:50,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:46:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 324 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:51,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:46:51,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133127688] [2021-12-06 20:46:51,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133127688] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:46:51,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145698547] [2021-12-06 20:46:51,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:46:51,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:51,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:46:51,592 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:46:51,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-06 20:46:51,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-06 20:46:51,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:46:51,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 20:46:51,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:52,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:53,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145698547] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:53,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:53,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 109 [2021-12-06 20:46:53,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867059690] [2021-12-06 20:46:53,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:53,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-06 20:46:53,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:53,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-06 20:46:53,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2195, Invalid=9577, Unknown=0, NotChecked=0, Total=11772 [2021-12-06 20:46:53,884 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 109 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:54,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:46:54,969 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2021-12-06 20:46:54,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 20:46:54,970 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 109 states have internal predecessors, (221), 0 states have call successors, (0), 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 93 [2021-12-06 20:46:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:46:54,970 INFO L225 Difference]: With dead ends: 149 [2021-12-06 20:46:54,970 INFO L226 Difference]: Without dead ends: 143 [2021-12-06 20:46:54,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 119 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7461 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4410, Invalid=12882, Unknown=0, NotChecked=0, Total=17292 [2021-12-06 20:46:54,971 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 236 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:46:54,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 81 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:46:54,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-06 20:46:55,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-12-06 20:46:55,017 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 20:46:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2021-12-06 20:46:55,017 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 93 [2021-12-06 20:46:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:46:55,017 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2021-12-06 20:46:55,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 109 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2021-12-06 20:46:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 20:46:55,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:46:55,018 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:46:55,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-12-06 20:46:55,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-12-06 20:46:55,219 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:46:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:46:55,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1858196545, now seen corresponding path program 37 times [2021-12-06 20:46:55,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:46:55,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935833225] [2021-12-06 20:46:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:46:55,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:46:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 361 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:56,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:46:56,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935833225] [2021-12-06 20:46:56,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935833225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:46:56,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358947594] [2021-12-06 20:46:56,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:46:56,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:56,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:46:56,030 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:46:56,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-06 20:46:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:56,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 20:46:56,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:57,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:58,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358947594] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:58,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:58,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 116 [2021-12-06 20:46:58,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904076695] [2021-12-06 20:46:58,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:58,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-06 20:46:58,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:58,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-06 20:46:58,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2369, Invalid=10971, Unknown=0, NotChecked=0, Total=13340 [2021-12-06 20:46:58,647 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 116 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 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 20:47:01,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:47:01,159 INFO L93 Difference]: Finished difference Result 253 states and 258 transitions. [2021-12-06 20:47:01,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 20:47:01,160 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 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 95 [2021-12-06 20:47:01,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:47:01,161 INFO L225 Difference]: With dead ends: 253 [2021-12-06 20:47:01,161 INFO L226 Difference]: Without dead ends: 200 [2021-12-06 20:47:01,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8295 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4005, Invalid=16587, Unknown=0, NotChecked=0, Total=20592 [2021-12-06 20:47:01,162 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 224 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:47:01,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 151 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:47:01,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-06 20:47:01,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2021-12-06 20:47:01,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.034965034965035) internal successors, (148), 143 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:01,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2021-12-06 20:47:01,203 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 95 [2021-12-06 20:47:01,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:47:01,203 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2021-12-06 20:47:01,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 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 20:47:01,203 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2021-12-06 20:47:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 20:47:01,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:47:01,204 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:47:01,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-12-06 20:47:01,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-12-06 20:47:01,404 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:47:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:47:01,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1375269245, now seen corresponding path program 37 times [2021-12-06 20:47:01,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:47:01,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826924253] [2021-12-06 20:47:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:47:01,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:47:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:47:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 361 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:02,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:47:02,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826924253] [2021-12-06 20:47:02,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826924253] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:47:02,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496878576] [2021-12-06 20:47:02,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:47:02,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:02,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:47:02,444 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:47:02,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-06 20:47:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:47:02,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 20:47:02,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:47:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:03,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:47:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:04,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496878576] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:47:04,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:47:04,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 115 [2021-12-06 20:47:04,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434316663] [2021-12-06 20:47:04,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:47:04,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-12-06 20:47:04,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:47:04,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-12-06 20:47:04,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2380, Invalid=10730, Unknown=0, NotChecked=0, Total=13110 [2021-12-06 20:47:04,986 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 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 20:47:06,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:47:06,203 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2021-12-06 20:47:06,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 20:47:06,203 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 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 95 [2021-12-06 20:47:06,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:47:06,203 INFO L225 Difference]: With dead ends: 167 [2021-12-06 20:47:06,204 INFO L226 Difference]: Without dead ends: 161 [2021-12-06 20:47:06,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8455 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4927, Invalid=14813, Unknown=0, NotChecked=0, Total=19740 [2021-12-06 20:47:06,205 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 460 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:47:06,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 85 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:47:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-06 20:47:06,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 146. [2021-12-06 20:47:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 145 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 20:47:06,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2021-12-06 20:47:06,246 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 95 [2021-12-06 20:47:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:47:06,246 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2021-12-06 20:47:06,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 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 20:47:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2021-12-06 20:47:06,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 20:47:06,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:47:06,247 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:47:06,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-12-06 20:47:06,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:06,448 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:47:06,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:47:06,449 INFO L85 PathProgramCache]: Analyzing trace with hash 832882143, now seen corresponding path program 38 times [2021-12-06 20:47:06,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:47:06,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862341671] [2021-12-06 20:47:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:47:06,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:47:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:47:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 402 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:07,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:47:07,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862341671] [2021-12-06 20:47:07,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862341671] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:47:07,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273056241] [2021-12-06 20:47:07,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:47:07,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:07,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:47:07,221 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:47:07,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-12-06 20:47:07,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:47:07,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:47:07,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 20:47:07,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:47:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:08,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:47:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:09,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273056241] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:47:09,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:47:09,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 114 [2021-12-06 20:47:09,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140282320] [2021-12-06 20:47:09,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:47:09,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-12-06 20:47:09,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:47:09,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-12-06 20:47:09,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2378, Invalid=10504, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 20:47:09,746 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 114 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 20:47:11,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:47:11,474 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2021-12-06 20:47:11,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 20:47:11,475 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 114 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 97 [2021-12-06 20:47:11,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:47:11,475 INFO L225 Difference]: With dead ends: 199 [2021-12-06 20:47:11,475 INFO L226 Difference]: Without dead ends: 146 [2021-12-06 20:47:11,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7796 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3864, Invalid=15318, Unknown=0, NotChecked=0, Total=19182 [2021-12-06 20:47:11,476 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 105 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:47:11,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 117 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:47:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-06 20:47:11,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-12-06 20:47:11,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0277777777777777) internal successors, (148), 144 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:11,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2021-12-06 20:47:11,518 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 97 [2021-12-06 20:47:11,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:47:11,518 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2021-12-06 20:47:11,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 114 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 20:47:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2021-12-06 20:47:11,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 20:47:11,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:47:11,519 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:47:11,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-12-06 20:47:11,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:11,720 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:47:11,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:47:11,720 INFO L85 PathProgramCache]: Analyzing trace with hash -16182593, now seen corresponding path program 38 times [2021-12-06 20:47:11,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:47:11,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716379296] [2021-12-06 20:47:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:47:11,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:47:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:47:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 361 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:12,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:47:12,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716379296] [2021-12-06 20:47:12,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716379296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:47:12,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735444041] [2021-12-06 20:47:12,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:47:12,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:12,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:47:12,751 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:47:12,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-12-06 20:47:12,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:47:12,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:47:12,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 20:47:12,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:47:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:14,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:47:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:15,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735444041] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:47:15,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:47:15,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 114 [2021-12-06 20:47:15,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200944299] [2021-12-06 20:47:15,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:47:15,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-12-06 20:47:15,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:47:15,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-12-06 20:47:15,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2398, Invalid=10484, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 20:47:15,155 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 114 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:47:16,279 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2021-12-06 20:47:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 20:47:16,279 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 114 states have internal predecessors, (231), 0 states have call successors, (0), 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 97 [2021-12-06 20:47:16,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:47:16,280 INFO L225 Difference]: With dead ends: 155 [2021-12-06 20:47:16,280 INFO L226 Difference]: Without dead ends: 149 [2021-12-06 20:47:16,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8180 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4817, Invalid=14089, Unknown=0, NotChecked=0, Total=18906 [2021-12-06 20:47:16,281 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 428 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:47:16,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 49 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:47:16,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-06 20:47:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-12-06 20:47:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 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 20:47:16,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2021-12-06 20:47:16,324 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 97 [2021-12-06 20:47:16,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:47:16,324 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2021-12-06 20:47:16,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 114 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:16,324 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2021-12-06 20:47:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 20:47:16,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:47:16,324 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:47:16,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-12-06 20:47:16,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:16,525 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:47:16,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:47:16,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1904301857, now seen corresponding path program 39 times [2021-12-06 20:47:16,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:47:16,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717800763] [2021-12-06 20:47:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:47:16,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:47:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:47:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 400 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:17,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:47:17,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717800763] [2021-12-06 20:47:17,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717800763] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:47:17,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811657356] [2021-12-06 20:47:17,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:47:17,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:17,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:47:17,448 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:47:17,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-12-06 20:47:17,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-06 20:47:17,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:47:17,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 20:47:17,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:47:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:19,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:47:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:20,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811657356] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:47:20,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:47:20,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 121 [2021-12-06 20:47:20,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498416401] [2021-12-06 20:47:20,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:47:20,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-12-06 20:47:20,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:47:20,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-12-06 20:47:20,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2579, Invalid=11941, Unknown=0, NotChecked=0, Total=14520 [2021-12-06 20:47:20,375 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand has 121 states, 121 states have (on average 1.975206611570248) internal successors, (239), 121 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:47:23,001 INFO L93 Difference]: Finished difference Result 263 states and 268 transitions. [2021-12-06 20:47:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 20:47:23,001 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.975206611570248) internal successors, (239), 121 states have internal predecessors, (239), 0 states have call successors, (0), 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 99 [2021-12-06 20:47:23,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:47:23,002 INFO L225 Difference]: With dead ends: 263 [2021-12-06 20:47:23,002 INFO L226 Difference]: Without dead ends: 208 [2021-12-06 20:47:23,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 123 SyntacticMatches, 4 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9030 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4344, Invalid=18006, Unknown=0, NotChecked=0, Total=22350 [2021-12-06 20:47:23,003 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 201 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:47:23,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 204 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:47:23,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-06 20:47:23,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 150. [2021-12-06 20:47:23,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 149 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 20:47:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2021-12-06 20:47:23,048 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 99 [2021-12-06 20:47:23,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:47:23,048 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2021-12-06 20:47:23,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.975206611570248) internal successors, (239), 121 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:23,048 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2021-12-06 20:47:23,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 20:47:23,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:47:23,049 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:47:23,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-12-06 20:47:23,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-12-06 20:47:23,249 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:47:23,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:47:23,251 INFO L85 PathProgramCache]: Analyzing trace with hash -854172451, now seen corresponding path program 39 times [2021-12-06 20:47:23,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:47:23,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284224127] [2021-12-06 20:47:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:47:23,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:47:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:47:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 400 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:24,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:47:24,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284224127] [2021-12-06 20:47:24,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284224127] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:47:24,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110826091] [2021-12-06 20:47:24,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:47:24,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:24,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:47:24,427 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:47:24,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-12-06 20:47:24,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-06 20:47:24,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:47:24,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 20:47:24,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:47:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:25,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:47:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:27,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110826091] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:47:27,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:47:27,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 120 [2021-12-06 20:47:27,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460428603] [2021-12-06 20:47:27,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:47:27,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-12-06 20:47:27,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:47:27,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-12-06 20:47:27,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2591, Invalid=11689, Unknown=0, NotChecked=0, Total=14280 [2021-12-06 20:47:27,085 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 120 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:28,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:47:28,365 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2021-12-06 20:47:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 20:47:28,365 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 120 states have internal predecessors, (239), 0 states have call successors, (0), 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 99 [2021-12-06 20:47:28,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:47:28,365 INFO L225 Difference]: With dead ends: 173 [2021-12-06 20:47:28,365 INFO L226 Difference]: Without dead ends: 167 [2021-12-06 20:47:28,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9220 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5356, Invalid=16106, Unknown=0, NotChecked=0, Total=21462 [2021-12-06 20:47:28,367 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 361 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:47:28,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 71 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:47:28,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-06 20:47:28,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 152. [2021-12-06 20:47:28,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.033112582781457) internal successors, (156), 151 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 20:47:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2021-12-06 20:47:28,420 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 99 [2021-12-06 20:47:28,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:47:28,420 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2021-12-06 20:47:28,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 120 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:28,420 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2021-12-06 20:47:28,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 20:47:28,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:47:28,421 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:47:28,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-12-06 20:47:28,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:28,622 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:47:28,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:47:28,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1528092991, now seen corresponding path program 40 times [2021-12-06 20:47:28,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:47:28,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010416985] [2021-12-06 20:47:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:47:28,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:47:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:47:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 443 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:29,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:47:29,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010416985] [2021-12-06 20:47:29,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010416985] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:47:29,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146096137] [2021-12-06 20:47:29,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:47:29,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:29,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:47:29,467 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:47:29,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-12-06 20:47:29,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:47:29,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:47:29,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 20:47:29,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:47:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:31,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:47:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:32,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146096137] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:47:32,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:47:32,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 119 [2021-12-06 20:47:32,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527904313] [2021-12-06 20:47:32,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:47:32,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-06 20:47:32,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:47:32,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-06 20:47:32,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2589, Invalid=11453, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 20:47:32,223 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 119 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:47:34,101 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2021-12-06 20:47:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 20:47:34,102 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 119 states have internal predecessors, (239), 0 states have call successors, (0), 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 101 [2021-12-06 20:47:34,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:47:34,102 INFO L225 Difference]: With dead ends: 207 [2021-12-06 20:47:34,102 INFO L226 Difference]: Without dead ends: 152 [2021-12-06 20:47:34,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8508 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4199, Invalid=16681, Unknown=0, NotChecked=0, Total=20880 [2021-12-06 20:47:34,104 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 170 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:47:34,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 120 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:47:34,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-06 20:47:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-12-06 20:47:34,148 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 20:47:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2021-12-06 20:47:34,148 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 101 [2021-12-06 20:47:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:47:34,149 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2021-12-06 20:47:34,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 119 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2021-12-06 20:47:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 20:47:34,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:47:34,149 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:47:34,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-12-06 20:47:34,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:34,350 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:47:34,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:47:34,352 INFO L85 PathProgramCache]: Analyzing trace with hash -152492385, now seen corresponding path program 40 times [2021-12-06 20:47:34,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:47:34,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748872819] [2021-12-06 20:47:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:47:34,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:47:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:47:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 400 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:35,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:47:35,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748872819] [2021-12-06 20:47:35,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748872819] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:47:35,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274401175] [2021-12-06 20:47:35,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:47:35,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:35,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:47:35,464 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:47:35,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-12-06 20:47:35,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:47:35,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:47:35,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 20:47:35,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:47:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:37,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:47:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:38,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274401175] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:47:38,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:47:38,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 119 [2021-12-06 20:47:38,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871405025] [2021-12-06 20:47:38,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:47:38,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-06 20:47:38,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:47:38,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-06 20:47:38,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2610, Invalid=11432, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 20:47:38,061 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 119 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 20:47:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:47:39,221 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2021-12-06 20:47:39,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 20:47:39,221 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 119 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 101 [2021-12-06 20:47:39,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:47:39,222 INFO L225 Difference]: With dead ends: 161 [2021-12-06 20:47:39,222 INFO L226 Difference]: Without dead ends: 155 [2021-12-06 20:47:39,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8932 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5242, Invalid=15350, Unknown=0, NotChecked=0, Total=20592 [2021-12-06 20:47:39,223 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 254 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:47:39,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 55 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:47:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-06 20:47:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2021-12-06 20:47:39,269 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 20:47:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2021-12-06 20:47:39,269 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 101 [2021-12-06 20:47:39,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:47:39,270 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2021-12-06 20:47:39,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 119 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 20:47:39,270 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2021-12-06 20:47:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 20:47:39,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:47:39,270 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:47:39,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-12-06 20:47:39,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-12-06 20:47:39,471 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:47:39,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:47:39,472 INFO L85 PathProgramCache]: Analyzing trace with hash -240389375, now seen corresponding path program 41 times [2021-12-06 20:47:39,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:47:39,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496549114] [2021-12-06 20:47:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:47:39,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:47:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:47:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 441 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:40,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:47:40,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496549114] [2021-12-06 20:47:40,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496549114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:47:40,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739401806] [2021-12-06 20:47:40,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:47:40,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:40,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:47:40,401 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:47:40,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-12-06 20:47:40,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-12-06 20:47:40,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:47:40,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 20:47:40,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:47:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:42,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:47:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:43,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739401806] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:47:43,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:47:43,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 126 [2021-12-06 20:47:43,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555745573] [2021-12-06 20:47:43,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:47:43,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-12-06 20:47:43,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:47:43,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-12-06 20:47:43,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2798, Invalid=12952, Unknown=0, NotChecked=0, Total=15750 [2021-12-06 20:47:43,459 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 126 states, 126 states have (on average 1.9761904761904763) internal successors, (249), 126 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:47:46,576 INFO L93 Difference]: Finished difference Result 273 states and 278 transitions. [2021-12-06 20:47:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 20:47:46,577 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.9761904761904763) internal successors, (249), 126 states have internal predecessors, (249), 0 states have call successors, (0), 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 103 [2021-12-06 20:47:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:47:46,578 INFO L225 Difference]: With dead ends: 273 [2021-12-06 20:47:46,578 INFO L226 Difference]: Without dead ends: 216 [2021-12-06 20:47:46,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9796 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4697, Invalid=19483, Unknown=0, NotChecked=0, Total=24180 [2021-12-06 20:47:46,579 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 264 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:47:46,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 173 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:47:46,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-06 20:47:46,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2021-12-06 20:47:46,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.032258064516129) internal successors, (160), 155 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:46,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2021-12-06 20:47:46,623 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 103 [2021-12-06 20:47:46,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:47:46,624 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2021-12-06 20:47:46,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.9761904761904763) internal successors, (249), 126 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:46,624 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2021-12-06 20:47:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 20:47:46,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:47:46,624 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:47:46,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-12-06 20:47:46,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-12-06 20:47:46,825 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:47:46,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:47:46,826 INFO L85 PathProgramCache]: Analyzing trace with hash 633782589, now seen corresponding path program 41 times [2021-12-06 20:47:46,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:47:46,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408371559] [2021-12-06 20:47:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:47:46,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:47:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:47:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 441 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:48,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:47:48,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408371559] [2021-12-06 20:47:48,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408371559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:47:48,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442560657] [2021-12-06 20:47:48,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:47:48,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:48,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:47:48,077 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:47:48,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-12-06 20:47:48,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-12-06 20:47:48,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:47:48,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 20:47:48,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:47:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:49,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:47:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:50,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442560657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:47:50,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:47:50,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 125 [2021-12-06 20:47:50,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597216327] [2021-12-06 20:47:50,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:47:50,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-12-06 20:47:50,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:47:50,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-12-06 20:47:50,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2811, Invalid=12689, Unknown=0, NotChecked=0, Total=15500 [2021-12-06 20:47:50,932 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 125 states, 125 states have (on average 1.992) internal successors, (249), 125 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:52,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:47:52,274 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2021-12-06 20:47:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 20:47:52,274 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.992) internal successors, (249), 125 states have internal predecessors, (249), 0 states have call successors, (0), 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 103 [2021-12-06 20:47:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:47:52,275 INFO L225 Difference]: With dead ends: 179 [2021-12-06 20:47:52,275 INFO L226 Difference]: Without dead ends: 173 [2021-12-06 20:47:52,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10018 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5803, Invalid=17453, Unknown=0, NotChecked=0, Total=23256 [2021-12-06 20:47:52,276 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 398 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:47:52,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 79 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:47:52,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-06 20:47:52,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 158. [2021-12-06 20:47:52,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 157 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2021-12-06 20:47:52,325 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 103 [2021-12-06 20:47:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:47:52,326 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2021-12-06 20:47:52,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.992) internal successors, (249), 125 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:52,326 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2021-12-06 20:47:52,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-06 20:47:52,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:47:52,326 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:47:52,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-12-06 20:47:52,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:52,527 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:47:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:47:52,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1228776863, now seen corresponding path program 42 times [2021-12-06 20:47:52,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:47:52,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974989922] [2021-12-06 20:47:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:47:52,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:47:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:47:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 486 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:53,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:47:53,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974989922] [2021-12-06 20:47:53,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974989922] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:47:53,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441946591] [2021-12-06 20:47:53,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:47:53,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:53,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:47:53,409 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:47:53,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-12-06 20:47:53,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-12-06 20:47:53,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:47:53,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 20:47:53,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:47:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:55,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:47:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:56,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441946591] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:47:56,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:47:56,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 124 [2021-12-06 20:47:56,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624050447] [2021-12-06 20:47:56,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:47:56,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2021-12-06 20:47:56,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:47:56,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-12-06 20:47:56,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2809, Invalid=12443, Unknown=0, NotChecked=0, Total=15252 [2021-12-06 20:47:56,393 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 124 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:58,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:47:58,412 INFO L93 Difference]: Finished difference Result 215 states and 219 transitions. [2021-12-06 20:47:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 20:47:58,412 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 124 states have internal predecessors, (249), 0 states have call successors, (0), 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 105 [2021-12-06 20:47:58,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:47:58,413 INFO L225 Difference]: With dead ends: 215 [2021-12-06 20:47:58,413 INFO L226 Difference]: Without dead ends: 158 [2021-12-06 20:47:58,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 135 SyntacticMatches, 3 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9251 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4548, Invalid=18102, Unknown=0, NotChecked=0, Total=22650 [2021-12-06 20:47:58,414 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 157 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:47:58,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 126 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:47:58,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-06 20:47:58,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-12-06 20:47:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2021-12-06 20:47:58,460 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 105 [2021-12-06 20:47:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:47:58,460 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2021-12-06 20:47:58,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 124 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:58,460 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2021-12-06 20:47:58,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-06 20:47:58,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:47:58,460 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:47:58,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-12-06 20:47:58,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:58,661 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:47:58,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:47:58,662 INFO L85 PathProgramCache]: Analyzing trace with hash -679226497, now seen corresponding path program 42 times [2021-12-06 20:47:58,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:47:58,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884937830] [2021-12-06 20:47:58,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:47:58,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:47:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:47:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 441 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:59,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:47:59,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884937830] [2021-12-06 20:47:59,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884937830] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:47:59,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769058963] [2021-12-06 20:47:59,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:47:59,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:59,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:47:59,826 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:47:59,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-12-06 20:47:59,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-12-06 20:47:59,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:47:59,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 20:47:59,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:48:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:01,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:48:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:02,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769058963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:48:02,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:48:02,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 124 [2021-12-06 20:48:02,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194301884] [2021-12-06 20:48:02,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:48:02,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2021-12-06 20:48:02,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:48:02,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-12-06 20:48:02,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2831, Invalid=12421, Unknown=0, NotChecked=0, Total=15252 [2021-12-06 20:48:02,655 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 124 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:03,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:48:03,966 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2021-12-06 20:48:03,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 20:48:03,967 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 124 states have internal predecessors, (251), 0 states have call successors, (0), 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 105 [2021-12-06 20:48:03,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:48:03,968 INFO L225 Difference]: With dead ends: 167 [2021-12-06 20:48:03,968 INFO L226 Difference]: Without dead ends: 161 [2021-12-06 20:48:03,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9717 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5685, Invalid=16665, Unknown=0, NotChecked=0, Total=22350 [2021-12-06 20:48:03,969 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 418 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:48:03,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 78 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:48:03,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-06 20:48:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-12-06 20:48:04,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2021-12-06 20:48:04,018 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 105 [2021-12-06 20:48:04,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:48:04,019 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2021-12-06 20:48:04,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 124 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:04,019 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2021-12-06 20:48:04,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 20:48:04,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:48:04,019 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:48:04,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-12-06 20:48:04,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:04,221 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:48:04,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:48:04,222 INFO L85 PathProgramCache]: Analyzing trace with hash 374269921, now seen corresponding path program 43 times [2021-12-06 20:48:04,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:48:04,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117692212] [2021-12-06 20:48:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:48:04,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:48:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:48:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 484 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:05,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:48:05,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117692212] [2021-12-06 20:48:05,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117692212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:48:05,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328854845] [2021-12-06 20:48:05,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:48:05,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:05,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:48:05,228 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:48:05,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-12-06 20:48:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:48:05,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 20:48:05,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:48:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:07,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:48:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:08,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328854845] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:48:08,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:48:08,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 131 [2021-12-06 20:48:08,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498057893] [2021-12-06 20:48:08,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:48:08,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-12-06 20:48:08,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:48:08,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-12-06 20:48:08,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=14004, Unknown=0, NotChecked=0, Total=17030 [2021-12-06 20:48:08,530 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 131 states, 131 states have (on average 1.9770992366412214) internal successors, (259), 131 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:48:11,563 INFO L93 Difference]: Finished difference Result 283 states and 288 transitions. [2021-12-06 20:48:11,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 20:48:11,563 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.9770992366412214) internal successors, (259), 131 states have internal predecessors, (259), 0 states have call successors, (0), 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 107 [2021-12-06 20:48:11,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:48:11,564 INFO L225 Difference]: With dead ends: 283 [2021-12-06 20:48:11,564 INFO L226 Difference]: Without dead ends: 224 [2021-12-06 20:48:11,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10593 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5064, Invalid=21018, Unknown=0, NotChecked=0, Total=26082 [2021-12-06 20:48:11,566 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 224 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:48:11,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 163 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:48:11,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-06 20:48:11,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 162. [2021-12-06 20:48:11,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.031055900621118) internal successors, (166), 161 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 20:48:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2021-12-06 20:48:11,617 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 107 [2021-12-06 20:48:11,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:48:11,617 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2021-12-06 20:48:11,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.9770992366412214) internal successors, (259), 131 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2021-12-06 20:48:11,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 20:48:11,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:48:11,618 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:48:11,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-12-06 20:48:11,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:11,819 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:48:11,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:48:11,820 INFO L85 PathProgramCache]: Analyzing trace with hash 413097629, now seen corresponding path program 43 times [2021-12-06 20:48:11,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:48:11,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063349688] [2021-12-06 20:48:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:48:11,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:48:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:48:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 484 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:13,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:48:13,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063349688] [2021-12-06 20:48:13,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063349688] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:48:13,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649417957] [2021-12-06 20:48:13,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:48:13,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:13,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:48:13,086 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:48:13,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-12-06 20:48:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:48:13,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 20:48:13,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:48:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:15,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:48:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:16,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649417957] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:48:16,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:48:16,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 130 [2021-12-06 20:48:16,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334985703] [2021-12-06 20:48:16,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:48:16,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-12-06 20:48:16,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:48:16,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-12-06 20:48:16,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3040, Invalid=13730, Unknown=0, NotChecked=0, Total=16770 [2021-12-06 20:48:16,272 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 130 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:17,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:48:17,788 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2021-12-06 20:48:17,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 20:48:17,788 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 130 states have internal predecessors, (259), 0 states have call successors, (0), 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 107 [2021-12-06 20:48:17,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:48:17,789 INFO L225 Difference]: With dead ends: 185 [2021-12-06 20:48:17,789 INFO L226 Difference]: Without dead ends: 179 [2021-12-06 20:48:17,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10849 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6268, Invalid=18854, Unknown=0, NotChecked=0, Total=25122 [2021-12-06 20:48:17,790 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 362 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:48:17,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 113 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:48:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-06 20:48:17,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 164. [2021-12-06 20:48:17,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.030674846625767) internal successors, (168), 163 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 20:48:17,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2021-12-06 20:48:17,842 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 107 [2021-12-06 20:48:17,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:48:17,842 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2021-12-06 20:48:17,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 130 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:17,842 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2021-12-06 20:48:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 20:48:17,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:48:17,843 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:48:17,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-12-06 20:48:18,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:18,044 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:48:18,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:48:18,044 INFO L85 PathProgramCache]: Analyzing trace with hash -396072193, now seen corresponding path program 44 times [2021-12-06 20:48:18,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:48:18,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576454563] [2021-12-06 20:48:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:48:18,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:48:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:48:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 531 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:19,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:48:19,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576454563] [2021-12-06 20:48:19,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576454563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:48:19,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380447991] [2021-12-06 20:48:19,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:48:19,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:19,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:48:19,006 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:48:19,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-12-06 20:48:19,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:48:19,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:48:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 20:48:19,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:48:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:20,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:48:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:22,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380447991] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:48:22,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:48:22,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 129 [2021-12-06 20:48:22,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642351916] [2021-12-06 20:48:22,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:48:22,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-12-06 20:48:22,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:48:22,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-12-06 20:48:22,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3038, Invalid=13474, Unknown=0, NotChecked=0, Total=16512 [2021-12-06 20:48:22,059 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 129 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:48:24,146 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2021-12-06 20:48:24,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 20:48:24,146 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 129 states have internal predecessors, (259), 0 states have call successors, (0), 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 109 [2021-12-06 20:48:24,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:48:24,147 INFO L225 Difference]: With dead ends: 223 [2021-12-06 20:48:24,147 INFO L226 Difference]: Without dead ends: 164 [2021-12-06 20:48:24,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10025 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4911, Invalid=19581, Unknown=0, NotChecked=0, Total=24492 [2021-12-06 20:48:24,148 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 174 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:48:24,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 110 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:48:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-06 20:48:24,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-12-06 20:48:24,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 162 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 20:48:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2021-12-06 20:48:24,203 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 109 [2021-12-06 20:48:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:48:24,203 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2021-12-06 20:48:24,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 129 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:24,203 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2021-12-06 20:48:24,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 20:48:24,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:48:24,204 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:48:24,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-12-06 20:48:24,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-12-06 20:48:24,404 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:48:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:48:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1809426081, now seen corresponding path program 44 times [2021-12-06 20:48:24,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:48:24,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887546013] [2021-12-06 20:48:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:48:24,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:48:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:48:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 484 proven. 621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:25,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:48:25,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887546013] [2021-12-06 20:48:25,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887546013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:48:25,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53438223] [2021-12-06 20:48:25,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:48:25,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:25,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:48:25,662 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:48:25,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-12-06 20:48:25,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:48:25,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:48:25,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 20:48:25,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:48:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:27,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:48:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:28,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53438223] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:48:28,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:48:28,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 129 [2021-12-06 20:48:28,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316419227] [2021-12-06 20:48:28,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:48:28,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-12-06 20:48:28,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:48:28,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-12-06 20:48:28,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3061, Invalid=13451, Unknown=0, NotChecked=0, Total=16512 [2021-12-06 20:48:28,646 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 129 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:48:30,051 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2021-12-06 20:48:30,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 20:48:30,051 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 129 states have internal predecessors, (261), 0 states have call successors, (0), 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 109 [2021-12-06 20:48:30,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:48:30,052 INFO L225 Difference]: With dead ends: 173 [2021-12-06 20:48:30,052 INFO L226 Difference]: Without dead ends: 167 [2021-12-06 20:48:30,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10535 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6146, Invalid=18034, Unknown=0, NotChecked=0, Total=24180 [2021-12-06 20:48:30,053 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 404 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:48:30,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 78 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:48:30,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-06 20:48:30,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2021-12-06 20:48:30,106 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 20:48:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2021-12-06 20:48:30,106 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 109 [2021-12-06 20:48:30,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:48:30,106 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2021-12-06 20:48:30,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 129 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:30,107 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2021-12-06 20:48:30,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 20:48:30,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:48:30,107 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:48:30,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-12-06 20:48:30,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:30,308 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:48:30,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:48:30,309 INFO L85 PathProgramCache]: Analyzing trace with hash 879195585, now seen corresponding path program 45 times [2021-12-06 20:48:30,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:48:30,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483945473] [2021-12-06 20:48:30,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:48:30,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:48:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:48:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 529 proven. 623 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:31,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:48:31,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483945473] [2021-12-06 20:48:31,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483945473] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:48:31,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657816615] [2021-12-06 20:48:31,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:48:31,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:31,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:48:31,322 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:48:31,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-12-06 20:48:31,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-12-06 20:48:31,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:48:31,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 20:48:31,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:48:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:33,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:48:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:34,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657816615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:48:34,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:48:34,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 136 [2021-12-06 20:48:34,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095011605] [2021-12-06 20:48:34,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:48:34,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-12-06 20:48:34,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:48:34,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-12-06 20:48:34,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3263, Invalid=15097, Unknown=0, NotChecked=0, Total=18360 [2021-12-06 20:48:34,687 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 136 states, 136 states have (on average 1.9779411764705883) internal successors, (269), 136 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:38,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:48:38,273 INFO L93 Difference]: Finished difference Result 293 states and 298 transitions. [2021-12-06 20:48:38,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 20:48:38,274 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.9779411764705883) internal successors, (269), 136 states have internal predecessors, (269), 0 states have call successors, (0), 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 111 [2021-12-06 20:48:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:48:38,275 INFO L225 Difference]: With dead ends: 293 [2021-12-06 20:48:38,275 INFO L226 Difference]: Without dead ends: 232 [2021-12-06 20:48:38,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 138 SyntacticMatches, 4 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11421 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5445, Invalid=22611, Unknown=0, NotChecked=0, Total=28056 [2021-12-06 20:48:38,276 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 230 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:48:38,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 194 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:48:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-06 20:48:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2021-12-06 20:48:38,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.029940119760479) internal successors, (172), 167 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2021-12-06 20:48:38,331 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 111 [2021-12-06 20:48:38,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:48:38,332 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2021-12-06 20:48:38,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.9779411764705883) internal successors, (269), 136 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2021-12-06 20:48:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 20:48:38,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:48:38,332 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:48:38,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-12-06 20:48:38,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-12-06 20:48:38,533 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:48:38,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:48:38,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1311077629, now seen corresponding path program 45 times [2021-12-06 20:48:38,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:48:38,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313509358] [2021-12-06 20:48:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:48:38,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:48:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:48:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 529 proven. 623 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:39,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:48:39,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313509358] [2021-12-06 20:48:39,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313509358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:48:39,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745059319] [2021-12-06 20:48:39,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:48:39,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:39,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:48:39,881 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:48:39,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-12-06 20:48:39,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-12-06 20:48:39,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:48:39,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 20:48:39,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:48:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:41,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:48:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:42,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745059319] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:48:42,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:48:42,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 135 [2021-12-06 20:48:42,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230798295] [2021-12-06 20:48:42,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:48:42,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-12-06 20:48:42,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:48:42,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-12-06 20:48:42,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3278, Invalid=14812, Unknown=0, NotChecked=0, Total=18090 [2021-12-06 20:48:42,984 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand has 135 states, 135 states have (on average 1.9925925925925927) internal successors, (269), 135 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:48:44,464 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2021-12-06 20:48:44,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 20:48:44,464 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9925925925925927) internal successors, (269), 135 states have internal predecessors, (269), 0 states have call successors, (0), 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 111 [2021-12-06 20:48:44,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:48:44,465 INFO L225 Difference]: With dead ends: 191 [2021-12-06 20:48:44,465 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 20:48:44,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11713 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6751, Invalid=20309, Unknown=0, NotChecked=0, Total=27060 [2021-12-06 20:48:44,466 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 502 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:48:44,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 100 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:48:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 20:48:44,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 170. [2021-12-06 20:48:44,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.029585798816568) internal successors, (174), 169 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:44,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2021-12-06 20:48:44,522 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 111 [2021-12-06 20:48:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:48:44,522 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2021-12-06 20:48:44,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9925925925925927) internal successors, (269), 135 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2021-12-06 20:48:44,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 20:48:44,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:48:44,523 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:48:44,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-12-06 20:48:44,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-12-06 20:48:44,724 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:48:44,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:48:44,725 INFO L85 PathProgramCache]: Analyzing trace with hash -725718689, now seen corresponding path program 46 times [2021-12-06 20:48:44,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:48:44,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370547412] [2021-12-06 20:48:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:48:44,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:48:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:48:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 578 proven. 623 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:45,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:48:45,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370547412] [2021-12-06 20:48:45,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370547412] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:48:45,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844811409] [2021-12-06 20:48:45,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:48:45,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:45,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:48:45,709 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:48:45,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-12-06 20:48:45,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:48:45,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:48:45,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 20:48:45,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:48:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:47,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:48:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:49,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844811409] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:48:49,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:48:49,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 134 [2021-12-06 20:48:49,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629266137] [2021-12-06 20:48:49,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:48:49,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2021-12-06 20:48:49,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:48:49,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-12-06 20:48:49,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3276, Invalid=14546, Unknown=0, NotChecked=0, Total=17822 [2021-12-06 20:48:49,129 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 134 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:51,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:48:51,407 INFO L93 Difference]: Finished difference Result 231 states and 235 transitions. [2021-12-06 20:48:51,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 20:48:51,407 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 134 states have internal predecessors, (269), 0 states have call successors, (0), 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 113 [2021-12-06 20:48:51,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:48:51,408 INFO L225 Difference]: With dead ends: 231 [2021-12-06 20:48:51,408 INFO L226 Difference]: Without dead ends: 170 [2021-12-06 20:48:51,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10830 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5288, Invalid=21118, Unknown=0, NotChecked=0, Total=26406 [2021-12-06 20:48:51,409 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 240 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:48:51,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 109 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:48:51,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-06 20:48:51,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-12-06 20:48:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0238095238095237) internal successors, (172), 168 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:51,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2021-12-06 20:48:51,465 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 113 [2021-12-06 20:48:51,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:48:51,466 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2021-12-06 20:48:51,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 134 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:51,466 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2021-12-06 20:48:51,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 20:48:51,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:48:51,466 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:48:51,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-12-06 20:48:51,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:51,667 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:48:51,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:48:51,668 INFO L85 PathProgramCache]: Analyzing trace with hash 772667455, now seen corresponding path program 46 times [2021-12-06 20:48:51,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:48:51,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161805193] [2021-12-06 20:48:51,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:48:51,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:48:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:48:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 529 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:53,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:48:53,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161805193] [2021-12-06 20:48:53,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161805193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:48:53,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705334338] [2021-12-06 20:48:53,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:48:53,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:53,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:48:53,035 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:48:53,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-12-06 20:48:53,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:48:53,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:48:53,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 20:48:53,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:48:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:54,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:48:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:56,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705334338] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:48:56,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:48:56,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 134 [2021-12-06 20:48:56,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145811166] [2021-12-06 20:48:56,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:48:56,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2021-12-06 20:48:56,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:48:56,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-12-06 20:48:56,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3300, Invalid=14522, Unknown=0, NotChecked=0, Total=17822 [2021-12-06 20:48:56,264 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 134 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:48:57,806 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2021-12-06 20:48:57,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 20:48:57,806 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 134 states have internal predecessors, (271), 0 states have call successors, (0), 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 113 [2021-12-06 20:48:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:48:57,807 INFO L225 Difference]: With dead ends: 179 [2021-12-06 20:48:57,807 INFO L226 Difference]: Without dead ends: 173 [2021-12-06 20:48:57,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 144 SyntacticMatches, 4 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11386 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6625, Invalid=19457, Unknown=0, NotChecked=0, Total=26082 [2021-12-06 20:48:57,808 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 355 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:48:57,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 88 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:48:57,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-06 20:48:57,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2021-12-06 20:48:57,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 170 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2021-12-06 20:48:57,868 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 113 [2021-12-06 20:48:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:48:57,868 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2021-12-06 20:48:57,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 134 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:48:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2021-12-06 20:48:57,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 20:48:57,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:48:57,869 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:48:57,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-12-06 20:48:58,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:58,070 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:48:58,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:48:58,071 INFO L85 PathProgramCache]: Analyzing trace with hash -220013407, now seen corresponding path program 47 times [2021-12-06 20:48:58,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:48:58,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040477327] [2021-12-06 20:48:58,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:48:58,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:48:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:48:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 576 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:48:59,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:48:59,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040477327] [2021-12-06 20:48:59,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040477327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:48:59,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767059999] [2021-12-06 20:48:59,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:48:59,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:59,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:48:59,153 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:48:59,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-12-06 20:48:59,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-06 20:48:59,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:48:59,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 20:48:59,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:49:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:01,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:49:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:02,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767059999] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:49:02,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:49:02,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 141 [2021-12-06 20:49:02,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218483350] [2021-12-06 20:49:02,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:49:02,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2021-12-06 20:49:02,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:49:02,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-12-06 20:49:02,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3509, Invalid=16231, Unknown=0, NotChecked=0, Total=19740 [2021-12-06 20:49:02,851 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand has 141 states, 141 states have (on average 1.9787234042553192) internal successors, (279), 141 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:49:06,221 INFO L93 Difference]: Finished difference Result 303 states and 308 transitions. [2021-12-06 20:49:06,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-06 20:49:06,222 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.9787234042553192) internal successors, (279), 141 states have internal predecessors, (279), 0 states have call successors, (0), 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 115 [2021-12-06 20:49:06,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:49:06,223 INFO L225 Difference]: With dead ends: 303 [2021-12-06 20:49:06,223 INFO L226 Difference]: Without dead ends: 240 [2021-12-06 20:49:06,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 143 SyntacticMatches, 4 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12280 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5840, Invalid=24262, Unknown=0, NotChecked=0, Total=30102 [2021-12-06 20:49:06,224 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 219 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:49:06,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 218 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:49:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-06 20:49:06,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 174. [2021-12-06 20:49:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0289017341040463) internal successors, (178), 173 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 20:49:06,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2021-12-06 20:49:06,283 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 115 [2021-12-06 20:49:06,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:49:06,283 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2021-12-06 20:49:06,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.9787234042553192) internal successors, (279), 141 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:06,283 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2021-12-06 20:49:06,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 20:49:06,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:49:06,284 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:49:06,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-12-06 20:49:06,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-12-06 20:49:06,485 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:49:06,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:49:06,486 INFO L85 PathProgramCache]: Analyzing trace with hash -20036515, now seen corresponding path program 47 times [2021-12-06 20:49:06,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:49:06,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035749906] [2021-12-06 20:49:06,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:49:06,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:49:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:49:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 576 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:07,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:49:07,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035749906] [2021-12-06 20:49:07,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035749906] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:49:07,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332778700] [2021-12-06 20:49:07,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:49:07,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:49:07,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:49:07,922 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:49:07,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-12-06 20:49:07,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-06 20:49:07,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:49:07,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 20:49:07,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:49:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:10,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:49:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:11,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332778700] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:49:11,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:49:11,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 140 [2021-12-06 20:49:11,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364091722] [2021-12-06 20:49:11,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:49:11,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2021-12-06 20:49:11,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:49:11,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-12-06 20:49:11,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3525, Invalid=15935, Unknown=0, NotChecked=0, Total=19460 [2021-12-06 20:49:11,372 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 140 states, 140 states have (on average 1.9928571428571429) internal successors, (279), 140 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:49:13,032 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2021-12-06 20:49:13,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 20:49:13,032 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.9928571428571429) internal successors, (279), 140 states have internal predecessors, (279), 0 states have call successors, (0), 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 115 [2021-12-06 20:49:13,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:49:13,033 INFO L225 Difference]: With dead ends: 197 [2021-12-06 20:49:13,033 INFO L226 Difference]: Without dead ends: 191 [2021-12-06 20:49:13,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12610 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7252, Invalid=21818, Unknown=0, NotChecked=0, Total=29070 [2021-12-06 20:49:13,034 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 271 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:49:13,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 110 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:49:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-06 20:49:13,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 176. [2021-12-06 20:49:13,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0285714285714285) internal successors, (180), 175 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:13,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2021-12-06 20:49:13,097 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 115 [2021-12-06 20:49:13,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:49:13,097 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2021-12-06 20:49:13,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.9928571428571429) internal successors, (279), 140 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:13,097 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2021-12-06 20:49:13,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 20:49:13,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:49:13,098 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:49:13,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-12-06 20:49:13,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-12-06 20:49:13,299 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:49:13,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:49:13,300 INFO L85 PathProgramCache]: Analyzing trace with hash -26156865, now seen corresponding path program 48 times [2021-12-06 20:49:13,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:49:13,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356146825] [2021-12-06 20:49:13,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:49:13,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:49:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:49:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 627 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:14,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:49:14,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356146825] [2021-12-06 20:49:14,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356146825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:49:14,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001531713] [2021-12-06 20:49:14,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:49:14,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:49:14,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:49:14,365 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:49:14,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-12-06 20:49:14,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-12-06 20:49:14,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:49:14,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 20:49:14,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:49:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:16,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:49:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:17,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001531713] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:49:17,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:49:17,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 139 [2021-12-06 20:49:17,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487463656] [2021-12-06 20:49:17,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:49:17,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-12-06 20:49:17,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:49:17,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-12-06 20:49:17,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3523, Invalid=15659, Unknown=0, NotChecked=0, Total=19182 [2021-12-06 20:49:17,695 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 139 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:49:19,985 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2021-12-06 20:49:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 20:49:19,986 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 139 states have internal predecessors, (279), 0 states have call successors, (0), 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 117 [2021-12-06 20:49:19,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:49:19,986 INFO L225 Difference]: With dead ends: 239 [2021-12-06 20:49:19,987 INFO L226 Difference]: Without dead ends: 176 [2021-12-06 20:49:19,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 150 SyntacticMatches, 3 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11666 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5679, Invalid=22713, Unknown=0, NotChecked=0, Total=28392 [2021-12-06 20:49:19,988 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 120 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:49:19,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 153 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:49:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-06 20:49:20,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-12-06 20:49:20,049 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 20:49:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2021-12-06 20:49:20,049 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 117 [2021-12-06 20:49:20,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:49:20,049 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2021-12-06 20:49:20,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 139 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:20,049 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2021-12-06 20:49:20,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 20:49:20,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:49:20,050 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:49:20,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-12-06 20:49:20,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-12-06 20:49:20,251 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:49:20,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:49:20,252 INFO L85 PathProgramCache]: Analyzing trace with hash -664276961, now seen corresponding path program 48 times [2021-12-06 20:49:20,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:49:20,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271783831] [2021-12-06 20:49:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:49:20,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:49:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:49:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 576 proven. 725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:21,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:49:21,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271783831] [2021-12-06 20:49:21,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271783831] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:49:21,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562753913] [2021-12-06 20:49:21,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:49:21,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:49:21,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:49:21,587 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:49:21,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-12-06 20:49:21,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-12-06 20:49:21,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:49:21,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 20:49:21,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:49:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:23,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:49:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:24,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562753913] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:49:24,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:49:24,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 139 [2021-12-06 20:49:24,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201015276] [2021-12-06 20:49:24,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:49:24,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-12-06 20:49:24,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:49:24,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-12-06 20:49:24,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3548, Invalid=15634, Unknown=0, NotChecked=0, Total=19182 [2021-12-06 20:49:24,824 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 139 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:26,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:49:26,347 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2021-12-06 20:49:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 20:49:26,347 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 139 states have internal predecessors, (281), 0 states have call successors, (0), 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 117 [2021-12-06 20:49:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:49:26,348 INFO L225 Difference]: With dead ends: 185 [2021-12-06 20:49:26,348 INFO L226 Difference]: Without dead ends: 179 [2021-12-06 20:49:26,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 149 SyntacticMatches, 4 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12270 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7122, Invalid=20934, Unknown=0, NotChecked=0, Total=28056 [2021-12-06 20:49:26,349 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 394 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:49:26,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 73 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:49:26,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-06 20:49:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2021-12-06 20:49:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0227272727272727) internal successors, (180), 176 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2021-12-06 20:49:26,412 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 117 [2021-12-06 20:49:26,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:49:26,412 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2021-12-06 20:49:26,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 139 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:26,412 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2021-12-06 20:49:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-06 20:49:26,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:49:26,413 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:49:26,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-12-06 20:49:26,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-12-06 20:49:26,614 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:49:26,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:49:26,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1855872129, now seen corresponding path program 49 times [2021-12-06 20:49:26,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:49:26,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548398743] [2021-12-06 20:49:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:49:26,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:49:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:49:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 625 proven. 727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:27,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:49:27,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548398743] [2021-12-06 20:49:27,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548398743] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:49:27,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762188080] [2021-12-06 20:49:27,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:49:27,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:49:27,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:49:27,805 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:49:27,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-12-06 20:49:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:49:27,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 20:49:27,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:49:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:30,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:49:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:31,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762188080] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:49:31,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:49:31,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 146 [2021-12-06 20:49:31,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294655257] [2021-12-06 20:49:31,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:49:31,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2021-12-06 20:49:31,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:49:31,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-12-06 20:49:31,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3764, Invalid=17406, Unknown=0, NotChecked=0, Total=21170 [2021-12-06 20:49:31,673 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand has 146 states, 146 states have (on average 1.9794520547945205) internal successors, (289), 146 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:35,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:49:35,487 INFO L93 Difference]: Finished difference Result 313 states and 318 transitions. [2021-12-06 20:49:35,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 20:49:35,488 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.9794520547945205) internal successors, (289), 146 states have internal predecessors, (289), 0 states have call successors, (0), 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 119 [2021-12-06 20:49:35,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:49:35,488 INFO L225 Difference]: With dead ends: 313 [2021-12-06 20:49:35,489 INFO L226 Difference]: Without dead ends: 248 [2021-12-06 20:49:35,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 148 SyntacticMatches, 4 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13170 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=6249, Invalid=25971, Unknown=0, NotChecked=0, Total=32220 [2021-12-06 20:49:35,490 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 339 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:49:35,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 115 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:49:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-06 20:49:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 180. [2021-12-06 20:49:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0279329608938548) internal successors, (184), 179 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 20:49:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2021-12-06 20:49:35,551 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 119 [2021-12-06 20:49:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:49:35,551 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2021-12-06 20:49:35,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.9794520547945205) internal successors, (289), 146 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2021-12-06 20:49:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-06 20:49:35,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:49:35,551 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:49:35,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-12-06 20:49:35,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-12-06 20:49:35,753 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:49:35,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:49:35,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1761669955, now seen corresponding path program 49 times [2021-12-06 20:49:35,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:49:35,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185553366] [2021-12-06 20:49:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:49:35,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:49:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:49:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 625 proven. 727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:37,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:49:37,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185553366] [2021-12-06 20:49:37,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185553366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:49:37,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640165113] [2021-12-06 20:49:37,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:49:37,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:49:37,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:49:37,262 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:49:37,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-12-06 20:49:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:49:37,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 20:49:37,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:49:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:39,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:49:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:40,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640165113] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:49:40,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:49:40,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 145 [2021-12-06 20:49:40,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407293435] [2021-12-06 20:49:40,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:49:40,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-12-06 20:49:40,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:49:40,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-12-06 20:49:40,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3781, Invalid=17099, Unknown=0, NotChecked=0, Total=20880 [2021-12-06 20:49:40,753 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 145 states, 145 states have (on average 1.993103448275862) internal successors, (289), 145 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:49:42,579 INFO L93 Difference]: Finished difference Result 203 states and 206 transitions. [2021-12-06 20:49:42,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 20:49:42,579 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.993103448275862) internal successors, (289), 145 states have internal predecessors, (289), 0 states have call successors, (0), 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 119 [2021-12-06 20:49:42,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:49:42,580 INFO L225 Difference]: With dead ends: 203 [2021-12-06 20:49:42,580 INFO L226 Difference]: Without dead ends: 197 [2021-12-06 20:49:42,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13540 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7771, Invalid=23381, Unknown=0, NotChecked=0, Total=31152 [2021-12-06 20:49:42,581 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:49:42,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 181 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:49:42,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-06 20:49:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 182. [2021-12-06 20:49:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0276243093922652) internal successors, (186), 181 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 20:49:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2021-12-06 20:49:42,646 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 119 [2021-12-06 20:49:42,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:49:42,647 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2021-12-06 20:49:42,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.993103448275862) internal successors, (289), 145 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:42,647 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2021-12-06 20:49:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 20:49:42,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:49:42,647 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:49:42,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-12-06 20:49:42,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-12-06 20:49:42,849 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:49:42,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:49:42,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1301352735, now seen corresponding path program 50 times [2021-12-06 20:49:42,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:49:42,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600258847] [2021-12-06 20:49:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:49:42,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:49:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:49:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 678 proven. 727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:43,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:49:43,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600258847] [2021-12-06 20:49:43,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600258847] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:49:43,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072770034] [2021-12-06 20:49:43,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:49:43,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:49:43,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:49:43,943 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:49:43,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-12-06 20:49:43,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:49:43,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:49:43,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 20:49:43,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:49:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:46,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:49:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:47,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072770034] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:49:47,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:49:47,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 144 [2021-12-06 20:49:47,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722556592] [2021-12-06 20:49:47,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:49:47,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-12-06 20:49:47,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:49:47,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-12-06 20:49:47,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3779, Invalid=16813, Unknown=0, NotChecked=0, Total=20592 [2021-12-06 20:49:47,642 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand has 144 states, 144 states have (on average 2.0069444444444446) internal successors, (289), 144 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:50,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:49:50,152 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2021-12-06 20:49:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 20:49:50,152 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0069444444444446) internal successors, (289), 144 states have internal predecessors, (289), 0 states have call successors, (0), 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 121 [2021-12-06 20:49:50,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:49:50,153 INFO L225 Difference]: With dead ends: 247 [2021-12-06 20:49:50,153 INFO L226 Difference]: Without dead ends: 182 [2021-12-06 20:49:50,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12533 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=6084, Invalid=24366, Unknown=0, NotChecked=0, Total=30450 [2021-12-06 20:49:50,154 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 145 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:49:50,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 99 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:49:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-06 20:49:50,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2021-12-06 20:49:50,220 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 20:49:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2021-12-06 20:49:50,220 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 121 [2021-12-06 20:49:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:49:50,220 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2021-12-06 20:49:50,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.0069444444444446) internal successors, (289), 144 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2021-12-06 20:49:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 20:49:50,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:49:50,221 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:49:50,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-12-06 20:49:50,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:49:50,422 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:49:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:49:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash 475103487, now seen corresponding path program 50 times [2021-12-06 20:49:50,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:49:50,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297123062] [2021-12-06 20:49:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:49:50,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:49:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:49:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 625 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:51,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:49:51,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297123062] [2021-12-06 20:49:51,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297123062] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:49:51,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360951608] [2021-12-06 20:49:51,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:49:51,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:49:51,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:49:51,907 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:49:51,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-12-06 20:49:51,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:49:51,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:49:51,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 20:49:51,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:49:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:53,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:49:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:55,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360951608] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:49:55,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:49:55,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 144 [2021-12-06 20:49:55,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975386009] [2021-12-06 20:49:55,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:49:55,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-12-06 20:49:55,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:49:55,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-12-06 20:49:55,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3805, Invalid=16787, Unknown=0, NotChecked=0, Total=20592 [2021-12-06 20:49:55,401 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 144 states, 144 states have (on average 2.0208333333333335) internal successors, (291), 144 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:49:57,060 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2021-12-06 20:49:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 20:49:57,060 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0208333333333335) internal successors, (291), 144 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-06 20:49:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:49:57,061 INFO L225 Difference]: With dead ends: 191 [2021-12-06 20:49:57,061 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 20:49:57,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 154 SyntacticMatches, 4 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13187 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7637, Invalid=22465, Unknown=0, NotChecked=0, Total=30102 [2021-12-06 20:49:57,062 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 339 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:49:57,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 60 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:49:57,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 20:49:57,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-12-06 20:49:57,129 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 20:49:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2021-12-06 20:49:57,129 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 121 [2021-12-06 20:49:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:49:57,129 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2021-12-06 20:49:57,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.0208333333333335) internal successors, (291), 144 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2021-12-06 20:49:57,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 20:49:57,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:49:57,130 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:49:57,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-12-06 20:49:57,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:49:57,331 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:49:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:49:57,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1583822177, now seen corresponding path program 51 times [2021-12-06 20:49:57,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:49:57,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265101130] [2021-12-06 20:49:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:49:57,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:49:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:49:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 676 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:49:58,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:49:58,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265101130] [2021-12-06 20:49:58,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265101130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:49:58,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660961325] [2021-12-06 20:49:58,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:49:58,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:49:58,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:49:58,581 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:49:58,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-12-06 20:49:58,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-12-06 20:49:58,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:49:58,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 20:49:58,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:50:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:00,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:50:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:02,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660961325] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:50:02,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:50:02,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 151 [2021-12-06 20:50:02,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121233316] [2021-12-06 20:50:02,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:50:02,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2021-12-06 20:50:02,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:50:02,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-12-06 20:50:02,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4028, Invalid=18622, Unknown=0, NotChecked=0, Total=22650 [2021-12-06 20:50:02,624 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 151 states, 151 states have (on average 1.9801324503311257) internal successors, (299), 151 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:50:06,345 INFO L93 Difference]: Finished difference Result 323 states and 328 transitions. [2021-12-06 20:50:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 20:50:06,346 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.9801324503311257) internal successors, (299), 151 states have internal predecessors, (299), 0 states have call successors, (0), 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 123 [2021-12-06 20:50:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:50:06,347 INFO L225 Difference]: With dead ends: 323 [2021-12-06 20:50:06,347 INFO L226 Difference]: Without dead ends: 256 [2021-12-06 20:50:06,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14091 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=6672, Invalid=27738, Unknown=0, NotChecked=0, Total=34410 [2021-12-06 20:50:06,348 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 249 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:50:06,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 191 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:50:06,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-06 20:50:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 186. [2021-12-06 20:50:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.027027027027027) internal successors, (190), 185 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 20:50:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2021-12-06 20:50:06,418 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 123 [2021-12-06 20:50:06,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:50:06,418 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2021-12-06 20:50:06,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.9801324503311257) internal successors, (299), 151 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:06,418 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2021-12-06 20:50:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 20:50:06,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:50:06,419 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:50:06,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-12-06 20:50:06,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-12-06 20:50:06,620 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:50:06,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:50:06,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1527582237, now seen corresponding path program 51 times [2021-12-06 20:50:06,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:50:06,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46151639] [2021-12-06 20:50:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:50:06,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:50:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:50:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 676 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:08,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:50:08,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46151639] [2021-12-06 20:50:08,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46151639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:50:08,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104697668] [2021-12-06 20:50:08,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:50:08,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:50:08,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:50:08,180 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:50:08,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-12-06 20:50:08,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-12-06 20:50:08,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:50:08,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 20:50:08,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:50:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:10,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:50:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:11,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104697668] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:50:11,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:50:11,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 150 [2021-12-06 20:50:11,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972121463] [2021-12-06 20:50:11,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:50:11,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2021-12-06 20:50:11,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:50:11,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2021-12-06 20:50:11,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4046, Invalid=18304, Unknown=0, NotChecked=0, Total=22350 [2021-12-06 20:50:11,904 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand has 150 states, 150 states have (on average 1.9933333333333334) internal successors, (299), 150 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:50:13,767 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2021-12-06 20:50:13,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 20:50:13,767 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.9933333333333334) internal successors, (299), 150 states have internal predecessors, (299), 0 states have call successors, (0), 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 123 [2021-12-06 20:50:13,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:50:13,768 INFO L225 Difference]: With dead ends: 209 [2021-12-06 20:50:13,768 INFO L226 Difference]: Without dead ends: 203 [2021-12-06 20:50:13,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14503 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8308, Invalid=24998, Unknown=0, NotChecked=0, Total=33306 [2021-12-06 20:50:13,769 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 791 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:50:13,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 116 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:50:13,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-06 20:50:13,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 188. [2021-12-06 20:50:13,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0267379679144386) internal successors, (192), 187 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:13,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2021-12-06 20:50:13,838 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 123 [2021-12-06 20:50:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:50:13,838 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2021-12-06 20:50:13,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.9933333333333334) internal successors, (299), 150 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:13,838 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2021-12-06 20:50:13,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 20:50:13,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:50:13,838 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:50:13,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-12-06 20:50:14,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:50:14,040 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:50:14,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:50:14,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1176779391, now seen corresponding path program 52 times [2021-12-06 20:50:14,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:50:14,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965940233] [2021-12-06 20:50:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:50:14,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:50:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:50:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 731 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:15,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:50:15,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965940233] [2021-12-06 20:50:15,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965940233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:50:15,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019995341] [2021-12-06 20:50:15,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:50:15,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:50:15,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:50:15,212 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:50:15,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-12-06 20:50:15,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:50:15,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:50:15,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 20:50:15,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:50:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:17,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:50:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:18,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019995341] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:50:18,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:50:18,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 149 [2021-12-06 20:50:18,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034831831] [2021-12-06 20:50:18,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:50:18,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2021-12-06 20:50:18,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:50:18,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-12-06 20:50:18,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4044, Invalid=18008, Unknown=0, NotChecked=0, Total=22052 [2021-12-06 20:50:18,894 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand has 149 states, 149 states have (on average 2.0067114093959733) internal successors, (299), 149 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:50:21,750 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2021-12-06 20:50:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-06 20:50:21,750 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.0067114093959733) internal successors, (299), 149 states have internal predecessors, (299), 0 states have call successors, (0), 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 125 [2021-12-06 20:50:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:50:21,750 INFO L225 Difference]: With dead ends: 255 [2021-12-06 20:50:21,750 INFO L226 Difference]: Without dead ends: 188 [2021-12-06 20:50:21,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13431 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=6503, Invalid=26077, Unknown=0, NotChecked=0, Total=32580 [2021-12-06 20:50:21,752 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 177 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:50:21,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 142 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:50:21,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-06 20:50:21,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-12-06 20:50:21,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.021505376344086) internal successors, (190), 186 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 20:50:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2021-12-06 20:50:21,827 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 125 [2021-12-06 20:50:21,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:50:21,827 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2021-12-06 20:50:21,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.0067114093959733) internal successors, (299), 149 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:21,828 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2021-12-06 20:50:21,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 20:50:21,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:50:21,828 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:50:21,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-12-06 20:50:22,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:50:22,029 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:50:22,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:50:22,030 INFO L85 PathProgramCache]: Analyzing trace with hash -52958497, now seen corresponding path program 52 times [2021-12-06 20:50:22,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:50:22,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836889044] [2021-12-06 20:50:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:50:22,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:50:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:50:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 676 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:23,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:50:23,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836889044] [2021-12-06 20:50:23,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836889044] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:50:23,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697185925] [2021-12-06 20:50:23,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:50:23,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:50:23,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:50:23,724 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:50:23,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-12-06 20:50:23,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:50:23,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:50:23,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 20:50:23,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:50:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:25,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:50:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:27,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697185925] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:50:27,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:50:27,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 149 [2021-12-06 20:50:27,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76142954] [2021-12-06 20:50:27,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:50:27,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2021-12-06 20:50:27,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:50:27,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-12-06 20:50:27,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4071, Invalid=17981, Unknown=0, NotChecked=0, Total=22052 [2021-12-06 20:50:27,414 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 149 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:29,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:50:29,201 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2021-12-06 20:50:29,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 20:50:29,201 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 149 states have internal predecessors, (301), 0 states have call successors, (0), 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 125 [2021-12-06 20:50:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:50:29,202 INFO L225 Difference]: With dead ends: 197 [2021-12-06 20:50:29,202 INFO L226 Difference]: Without dead ends: 191 [2021-12-06 20:50:29,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14137 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8170, Invalid=24050, Unknown=0, NotChecked=0, Total=32220 [2021-12-06 20:50:29,203 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 470 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:50:29,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 45 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:50:29,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-06 20:50:29,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2021-12-06 20:50:29,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 188 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2021-12-06 20:50:29,277 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 125 [2021-12-06 20:50:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:50:29,277 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2021-12-06 20:50:29,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 149 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2021-12-06 20:50:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-06 20:50:29,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:50:29,278 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:50:29,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-12-06 20:50:29,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-12-06 20:50:29,479 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:50:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:50:29,480 INFO L85 PathProgramCache]: Analyzing trace with hash 922396481, now seen corresponding path program 53 times [2021-12-06 20:50:29,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:50:29,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814414748] [2021-12-06 20:50:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:50:29,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:50:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:50:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 729 proven. 839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:30,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:50:30,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814414748] [2021-12-06 20:50:30,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814414748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:50:30,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679226784] [2021-12-06 20:50:30,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:50:30,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:50:30,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:50:30,812 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:50:30,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-12-06 20:50:30,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-12-06 20:50:30,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:50:30,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 20:50:30,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:50:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:33,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:50:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:34,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679226784] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:50:34,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:50:34,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 156 [2021-12-06 20:50:34,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196711313] [2021-12-06 20:50:34,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:50:34,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2021-12-06 20:50:34,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:50:34,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2021-12-06 20:50:34,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4301, Invalid=19879, Unknown=0, NotChecked=0, Total=24180 [2021-12-06 20:50:34,977 INFO L87 Difference]: Start difference. First operand 189 states and 192 transitions. Second operand has 156 states, 156 states have (on average 1.9807692307692308) internal successors, (309), 156 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:50:39,284 INFO L93 Difference]: Finished difference Result 333 states and 338 transitions. [2021-12-06 20:50:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-06 20:50:39,285 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.9807692307692308) internal successors, (309), 156 states have internal predecessors, (309), 0 states have call successors, (0), 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 127 [2021-12-06 20:50:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:50:39,285 INFO L225 Difference]: With dead ends: 333 [2021-12-06 20:50:39,285 INFO L226 Difference]: Without dead ends: 264 [2021-12-06 20:50:39,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 158 SyntacticMatches, 4 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15043 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=7109, Invalid=29563, Unknown=0, NotChecked=0, Total=36672 [2021-12-06 20:50:39,287 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 283 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:50:39,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 145 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:50:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-06 20:50:39,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 192. [2021-12-06 20:50:39,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0261780104712042) internal successors, (196), 191 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:39,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2021-12-06 20:50:39,358 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 127 [2021-12-06 20:50:39,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:50:39,358 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2021-12-06 20:50:39,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.9807692307692308) internal successors, (309), 156 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:39,358 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2021-12-06 20:50:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-06 20:50:39,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:50:39,359 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:50:39,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-12-06 20:50:39,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:50:39,559 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:50:39,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:50:39,559 INFO L85 PathProgramCache]: Analyzing trace with hash 188582013, now seen corresponding path program 53 times [2021-12-06 20:50:39,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:50:39,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955727827] [2021-12-06 20:50:39,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:50:39,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:50:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:50:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 729 proven. 839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:41,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:50:41,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955727827] [2021-12-06 20:50:41,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955727827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:50:41,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603885487] [2021-12-06 20:50:41,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:50:41,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:50:41,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:50:41,299 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:50:41,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-12-06 20:50:41,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-12-06 20:50:41,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:50:41,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 20:50:41,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:50:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:43,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:50:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:45,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603885487] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:50:45,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:50:45,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 155 [2021-12-06 20:50:45,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295022081] [2021-12-06 20:50:45,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:50:45,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2021-12-06 20:50:45,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:50:45,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-12-06 20:50:45,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4320, Invalid=19550, Unknown=0, NotChecked=0, Total=23870 [2021-12-06 20:50:45,239 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 155 states, 155 states have (on average 1.9935483870967743) internal successors, (309), 155 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:50:47,314 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2021-12-06 20:50:47,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 20:50:47,315 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.9935483870967743) internal successors, (309), 155 states have internal predecessors, (309), 0 states have call successors, (0), 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 127 [2021-12-06 20:50:47,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:50:47,315 INFO L225 Difference]: With dead ends: 215 [2021-12-06 20:50:47,315 INFO L226 Difference]: Without dead ends: 209 [2021-12-06 20:50:47,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 158 SyntacticMatches, 5 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15499 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=8863, Invalid=26669, Unknown=0, NotChecked=0, Total=35532 [2021-12-06 20:50:47,317 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 342 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:50:47,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 117 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:50:47,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-06 20:50:47,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 194. [2021-12-06 20:50:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 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 20:50:47,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2021-12-06 20:50:47,390 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 127 [2021-12-06 20:50:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:50:47,390 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2021-12-06 20:50:47,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.9935483870967743) internal successors, (309), 155 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2021-12-06 20:50:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-06 20:50:47,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:50:47,391 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:50:47,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-12-06 20:50:47,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-12-06 20:50:47,592 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:50:47,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:50:47,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1407214369, now seen corresponding path program 54 times [2021-12-06 20:50:47,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:50:47,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839432771] [2021-12-06 20:50:47,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:50:47,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:50:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:50:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 786 proven. 839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:48,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:50:48,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839432771] [2021-12-06 20:50:48,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839432771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:50:48,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257093192] [2021-12-06 20:50:48,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:50:48,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:50:48,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:50:48,817 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:50:48,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-12-06 20:50:48,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2021-12-06 20:50:48,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:50:48,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 20:50:48,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:50:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:51,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:50:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:53,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257093192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:50:53,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:50:53,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 154 [2021-12-06 20:50:53,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303678632] [2021-12-06 20:50:53,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:50:53,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2021-12-06 20:50:53,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:50:53,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2021-12-06 20:50:53,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4318, Invalid=19244, Unknown=0, NotChecked=0, Total=23562 [2021-12-06 20:50:53,107 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand has 154 states, 154 states have (on average 2.0064935064935066) internal successors, (309), 154 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:55,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:50:55,981 INFO L93 Difference]: Finished difference Result 263 states and 267 transitions. [2021-12-06 20:50:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 20:50:55,981 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 2.0064935064935066) internal successors, (309), 154 states have internal predecessors, (309), 0 states have call successors, (0), 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 129 [2021-12-06 20:50:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:50:55,982 INFO L225 Difference]: With dead ends: 263 [2021-12-06 20:50:55,982 INFO L226 Difference]: Without dead ends: 194 [2021-12-06 20:50:55,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14360 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=6936, Invalid=27846, Unknown=0, NotChecked=0, Total=34782 [2021-12-06 20:50:55,983 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 207 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:50:55,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 141 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:50:55,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-06 20:50:56,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-12-06 20:50:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0208333333333333) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:56,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2021-12-06 20:50:56,054 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 129 [2021-12-06 20:50:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:50:56,054 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2021-12-06 20:50:56,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 2.0064935064935066) internal successors, (309), 154 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:50:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2021-12-06 20:50:56,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-06 20:50:56,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:50:56,054 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:50:56,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-12-06 20:50:56,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-12-06 20:50:56,256 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:50:56,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:50:56,256 INFO L85 PathProgramCache]: Analyzing trace with hash 452488639, now seen corresponding path program 54 times [2021-12-06 20:50:56,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:50:56,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851044037] [2021-12-06 20:50:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:50:56,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:50:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:50:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 729 proven. 896 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:58,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:50:58,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851044037] [2021-12-06 20:50:58,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851044037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:50:58,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685541379] [2021-12-06 20:50:58,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:50:58,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:50:58,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:50:58,071 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:50:58,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-12-06 20:50:58,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2021-12-06 20:50:58,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:50:58,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 20:50:58,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:51:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:00,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:51:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:01,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685541379] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:51:01,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:51:01,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 154 [2021-12-06 20:51:01,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567209176] [2021-12-06 20:51:01,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:51:01,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2021-12-06 20:51:01,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:01,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2021-12-06 20:51:01,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4346, Invalid=19216, Unknown=0, NotChecked=0, Total=23562 [2021-12-06 20:51:01,949 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 154 states, 154 states have (on average 2.0194805194805197) internal successors, (311), 154 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:03,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:03,849 INFO L93 Difference]: Finished difference Result 203 states and 206 transitions. [2021-12-06 20:51:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 20:51:03,850 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 2.0194805194805197) internal successors, (311), 154 states have internal predecessors, (311), 0 states have call successors, (0), 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 129 [2021-12-06 20:51:03,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:03,850 INFO L225 Difference]: With dead ends: 203 [2021-12-06 20:51:03,850 INFO L226 Difference]: Without dead ends: 197 [2021-12-06 20:51:03,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 164 SyntacticMatches, 4 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15120 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8721, Invalid=25689, Unknown=0, NotChecked=0, Total=34410 [2021-12-06 20:51:03,851 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 402 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:03,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 85 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:51:03,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-06 20:51:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2021-12-06 20:51:03,928 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 20:51:03,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2021-12-06 20:51:03,928 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 129 [2021-12-06 20:51:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:03,928 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2021-12-06 20:51:03,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 2.0194805194805197) internal successors, (311), 154 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2021-12-06 20:51:03,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 20:51:03,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:03,929 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:03,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-12-06 20:51:04,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-12-06 20:51:04,130 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:04,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:04,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1325789729, now seen corresponding path program 55 times [2021-12-06 20:51:04,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:04,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924276843] [2021-12-06 20:51:04,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:04,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 784 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:05,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:05,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924276843] [2021-12-06 20:51:05,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924276843] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:51:05,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220464295] [2021-12-06 20:51:05,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:51:05,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:51:05,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:51:05,403 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:51:05,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-12-06 20:51:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:05,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 20:51:05,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:51:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:07,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:51:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:09,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220464295] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:51:09,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:51:09,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 161 [2021-12-06 20:51:09,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837393935] [2021-12-06 20:51:09,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:51:09,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2021-12-06 20:51:09,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:09,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2021-12-06 20:51:09,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4583, Invalid=21177, Unknown=0, NotChecked=0, Total=25760 [2021-12-06 20:51:09,824 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 161 states, 161 states have (on average 1.9813664596273293) internal successors, (319), 161 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:14,052 INFO L93 Difference]: Finished difference Result 343 states and 348 transitions. [2021-12-06 20:51:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-06 20:51:14,053 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.9813664596273293) internal successors, (319), 161 states have internal predecessors, (319), 0 states have call successors, (0), 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 131 [2021-12-06 20:51:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:14,053 INFO L225 Difference]: With dead ends: 343 [2021-12-06 20:51:14,053 INFO L226 Difference]: Without dead ends: 272 [2021-12-06 20:51:14,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 163 SyntacticMatches, 4 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16026 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=7560, Invalid=31446, Unknown=0, NotChecked=0, Total=39006 [2021-12-06 20:51:14,055 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 235 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:14,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 136 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:51:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-06 20:51:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 198. [2021-12-06 20:51:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0253807106598984) internal successors, (202), 197 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2021-12-06 20:51:14,129 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 131 [2021-12-06 20:51:14,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:14,129 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2021-12-06 20:51:14,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.9813664596273293) internal successors, (319), 161 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:14,129 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2021-12-06 20:51:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 20:51:14,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:14,130 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:14,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-12-06 20:51:14,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:51:14,331 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:14,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:14,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2017084451, now seen corresponding path program 55 times [2021-12-06 20:51:14,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:14,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324546269] [2021-12-06 20:51:14,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:14,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 784 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:16,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:16,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324546269] [2021-12-06 20:51:16,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324546269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:51:16,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122715279] [2021-12-06 20:51:16,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:51:16,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:51:16,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:51:16,040 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:51:16,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-12-06 20:51:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:16,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 20:51:16,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:51:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:18,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:51:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:20,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122715279] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:51:20,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:51:20,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 160 [2021-12-06 20:51:20,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194415364] [2021-12-06 20:51:20,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:51:20,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2021-12-06 20:51:20,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:20,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2021-12-06 20:51:20,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4603, Invalid=20837, Unknown=0, NotChecked=0, Total=25440 [2021-12-06 20:51:20,071 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand has 160 states, 160 states have (on average 1.99375) internal successors, (319), 160 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:22,483 INFO L93 Difference]: Finished difference Result 221 states and 224 transitions. [2021-12-06 20:51:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-06 20:51:22,484 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 1.99375) internal successors, (319), 160 states have internal predecessors, (319), 0 states have call successors, (0), 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 131 [2021-12-06 20:51:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:22,484 INFO L225 Difference]: With dead ends: 221 [2021-12-06 20:51:22,484 INFO L226 Difference]: Without dead ends: 215 [2021-12-06 20:51:22,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16528 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9436, Invalid=28394, Unknown=0, NotChecked=0, Total=37830 [2021-12-06 20:51:22,486 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 567 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:22,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 151 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 20:51:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-06 20:51:22,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 200. [2021-12-06 20:51:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0251256281407035) internal successors, (204), 199 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2021-12-06 20:51:22,561 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 131 [2021-12-06 20:51:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:22,561 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2021-12-06 20:51:22,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 1.99375) internal successors, (319), 160 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:22,561 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2021-12-06 20:51:22,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-06 20:51:22,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:22,562 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:22,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-12-06 20:51:22,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-12-06 20:51:22,763 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:22,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:22,764 INFO L85 PathProgramCache]: Analyzing trace with hash 661157951, now seen corresponding path program 56 times [2021-12-06 20:51:22,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:22,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831446477] [2021-12-06 20:51:22,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:22,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 843 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:24,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:24,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831446477] [2021-12-06 20:51:24,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831446477] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:51:24,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74110064] [2021-12-06 20:51:24,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:51:24,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:51:24,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:51:24,078 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:51:24,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-12-06 20:51:24,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:51:24,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:51:24,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-06 20:51:24,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:51:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:26,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:51:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:28,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74110064] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:51:28,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:51:28,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 159 [2021-12-06 20:51:28,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538403744] [2021-12-06 20:51:28,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:51:28,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2021-12-06 20:51:28,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:28,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-12-06 20:51:28,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4601, Invalid=20521, Unknown=0, NotChecked=0, Total=25122 [2021-12-06 20:51:28,360 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 159 states, 159 states have (on average 2.006289308176101) internal successors, (319), 159 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:31,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:31,407 INFO L93 Difference]: Finished difference Result 271 states and 275 transitions. [2021-12-06 20:51:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 20:51:31,407 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 2.006289308176101) internal successors, (319), 159 states have internal predecessors, (319), 0 states have call successors, (0), 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 133 [2021-12-06 20:51:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:31,407 INFO L225 Difference]: With dead ends: 271 [2021-12-06 20:51:31,408 INFO L226 Difference]: Without dead ends: 200 [2021-12-06 20:51:31,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15320 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=7383, Invalid=29673, Unknown=0, NotChecked=0, Total=37056 [2021-12-06 20:51:31,409 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 139 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:31,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 158 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:51:31,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-06 20:51:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-12-06 20:51:31,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.02020202020202) internal successors, (202), 198 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:31,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 202 transitions. [2021-12-06 20:51:31,489 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 202 transitions. Word has length 133 [2021-12-06 20:51:31,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:31,489 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 202 transitions. [2021-12-06 20:51:31,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 2.006289308176101) internal successors, (319), 159 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:31,489 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 202 transitions. [2021-12-06 20:51:31,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-06 20:51:31,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:31,489 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:31,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-12-06 20:51:31,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-12-06 20:51:31,691 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:31,692 INFO L85 PathProgramCache]: Analyzing trace with hash -643806817, now seen corresponding path program 56 times [2021-12-06 20:51:31,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:31,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406570812] [2021-12-06 20:51:31,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:31,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 784 proven. 957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:33,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:33,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406570812] [2021-12-06 20:51:33,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406570812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:51:33,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282389410] [2021-12-06 20:51:33,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:51:33,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:51:33,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:51:33,431 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:51:33,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-12-06 20:51:33,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:51:33,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:51:33,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-06 20:51:33,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:51:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:35,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:51:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:37,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282389410] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:51:37,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:51:37,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 159 [2021-12-06 20:51:37,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541290421] [2021-12-06 20:51:37,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:51:37,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2021-12-06 20:51:37,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:37,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-12-06 20:51:37,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4630, Invalid=20492, Unknown=0, NotChecked=0, Total=25122 [2021-12-06 20:51:37,531 INFO L87 Difference]: Start difference. First operand 199 states and 202 transitions. Second operand has 159 states, 159 states have (on average 2.0377358490566038) internal successors, (324), 159 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:39,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:39,477 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2021-12-06 20:51:39,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 20:51:39,478 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 2.0377358490566038) internal successors, (324), 159 states have internal predecessors, (324), 0 states have call successors, (0), 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 133 [2021-12-06 20:51:39,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:39,478 INFO L225 Difference]: With dead ends: 209 [2021-12-06 20:51:39,478 INFO L226 Difference]: Without dead ends: 203 [2021-12-06 20:51:39,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 169 SyntacticMatches, 4 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16136 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9290, Invalid=27382, Unknown=0, NotChecked=0, Total=36672 [2021-12-06 20:51:39,480 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 497 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:39,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 63 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:51:39,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-06 20:51:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2021-12-06 20:51:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.02) internal successors, (204), 200 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:39,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 204 transitions. [2021-12-06 20:51:39,562 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 204 transitions. Word has length 133 [2021-12-06 20:51:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:39,562 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 204 transitions. [2021-12-06 20:51:39,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 2.0377358490566038) internal successors, (324), 159 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 204 transitions. [2021-12-06 20:51:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 20:51:39,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:39,563 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:39,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-12-06 20:51:39,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-12-06 20:51:39,764 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:39,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:39,765 INFO L85 PathProgramCache]: Analyzing trace with hash 52844033, now seen corresponding path program 57 times [2021-12-06 20:51:39,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:39,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413730861] [2021-12-06 20:51:39,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:39,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 841 proven. 959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:41,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:41,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413730861] [2021-12-06 20:51:41,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413730861] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:51:41,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790820691] [2021-12-06 20:51:41,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:51:41,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:51:41,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:51:41,116 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:51:41,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-12-06 20:51:41,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-12-06 20:51:41,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:51:41,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 20:51:41,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:51:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:43,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:51:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:46,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790820691] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:51:46,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:51:46,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 166 [2021-12-06 20:51:46,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953486578] [2021-12-06 20:51:46,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:51:46,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2021-12-06 20:51:46,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:46,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2021-12-06 20:51:46,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4874, Invalid=22516, Unknown=0, NotChecked=0, Total=27390 [2021-12-06 20:51:46,117 INFO L87 Difference]: Start difference. First operand 201 states and 204 transitions. Second operand has 166 states, 166 states have (on average 1.9819277108433735) internal successors, (329), 166 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:50,678 INFO L93 Difference]: Finished difference Result 353 states and 358 transitions. [2021-12-06 20:51:50,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-06 20:51:50,679 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 1.9819277108433735) internal successors, (329), 166 states have internal predecessors, (329), 0 states have call successors, (0), 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 135 [2021-12-06 20:51:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:50,680 INFO L225 Difference]: With dead ends: 353 [2021-12-06 20:51:50,680 INFO L226 Difference]: Without dead ends: 280 [2021-12-06 20:51:50,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 168 SyntacticMatches, 4 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17040 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=8025, Invalid=33387, Unknown=0, NotChecked=0, Total=41412 [2021-12-06 20:51:50,681 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 345 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:50,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 167 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:51:50,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-06 20:51:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 204. [2021-12-06 20:51:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0246305418719213) internal successors, (208), 203 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 20:51:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2021-12-06 20:51:50,763 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 135 [2021-12-06 20:51:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:50,763 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2021-12-06 20:51:50,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 1.9819277108433735) internal successors, (329), 166 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:50,764 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2021-12-06 20:51:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 20:51:50,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:50,764 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:50,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-12-06 20:51:50,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:51:50,965 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:50,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:50,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1959454781, now seen corresponding path program 57 times [2021-12-06 20:51:50,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:50,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202731074] [2021-12-06 20:51:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:50,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 841 proven. 959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:52,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:52,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202731074] [2021-12-06 20:51:52,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202731074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:51:52,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920030418] [2021-12-06 20:51:52,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:51:52,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:51:52,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:51:52,869 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:51:52,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-12-06 20:51:52,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-12-06 20:51:52,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:51:52,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 20:51:52,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:51:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:55,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:51:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:57,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920030418] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:51:57,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:51:57,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 165 [2021-12-06 20:51:57,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919962815] [2021-12-06 20:51:57,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:51:57,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2021-12-06 20:51:57,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2021-12-06 20:51:57,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4895, Invalid=22165, Unknown=0, NotChecked=0, Total=27060 [2021-12-06 20:51:57,261 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 165 states, 165 states have (on average 1.993939393939394) internal successors, (329), 165 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:59,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:59,492 INFO L93 Difference]: Finished difference Result 227 states and 230 transitions. [2021-12-06 20:51:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 20:51:59,492 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.993939393939394) internal successors, (329), 165 states have internal predecessors, (329), 0 states have call successors, (0), 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 135 [2021-12-06 20:51:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:59,493 INFO L225 Difference]: With dead ends: 227 [2021-12-06 20:51:59,493 INFO L226 Difference]: Without dead ends: 221 [2021-12-06 20:51:59,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 168 SyntacticMatches, 5 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17590 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10027, Invalid=30173, Unknown=0, NotChecked=0, Total=40200 [2021-12-06 20:51:59,494 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 631 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:59,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 106 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:51:59,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-06 20:51:59,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 206. [2021-12-06 20:51:59,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.024390243902439) internal successors, (210), 205 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 20:51:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2021-12-06 20:51:59,579 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 135 [2021-12-06 20:51:59,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:59,580 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2021-12-06 20:51:59,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.993939393939394) internal successors, (329), 165 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:59,580 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2021-12-06 20:51:59,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-06 20:51:59,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:59,580 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:59,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-12-06 20:51:59,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-12-06 20:51:59,781 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:59,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:59,782 INFO L85 PathProgramCache]: Analyzing trace with hash -405533537, now seen corresponding path program 58 times [2021-12-06 20:51:59,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:59,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392224616] [2021-12-06 20:51:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:59,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 902 proven. 959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:01,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:01,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392224616] [2021-12-06 20:52:01,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392224616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:52:01,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052974653] [2021-12-06 20:52:01,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:52:01,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:52:01,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:52:01,227 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:52:01,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-12-06 20:52:01,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:52:01,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:52:01,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 20:52:01,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:52:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:03,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:52:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:05,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052974653] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:52:05,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:52:05,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 164 [2021-12-06 20:52:05,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10813829] [2021-12-06 20:52:05,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:52:05,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2021-12-06 20:52:05,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:05,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2021-12-06 20:52:05,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4893, Invalid=21839, Unknown=0, NotChecked=0, Total=26732 [2021-12-06 20:52:05,658 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand has 164 states, 164 states have (on average 2.0060975609756095) internal successors, (329), 164 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:08,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:08,766 INFO L93 Difference]: Finished difference Result 279 states and 283 transitions. [2021-12-06 20:52:08,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-06 20:52:08,767 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0060975609756095) internal successors, (329), 164 states have internal predecessors, (329), 0 states have call successors, (0), 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 137 [2021-12-06 20:52:08,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:08,767 INFO L225 Difference]: With dead ends: 279 [2021-12-06 20:52:08,767 INFO L226 Difference]: Without dead ends: 206 [2021-12-06 20:52:08,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16311 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=7844, Invalid=31558, Unknown=0, NotChecked=0, Total=39402 [2021-12-06 20:52:08,769 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 159 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:08,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 137 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:52:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-06 20:52:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-12-06 20:52:08,853 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 20:52:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2021-12-06 20:52:08,854 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 137 [2021-12-06 20:52:08,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:08,854 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2021-12-06 20:52:08,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.0060975609756095) internal successors, (329), 164 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:08,854 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2021-12-06 20:52:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-06 20:52:08,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:08,854 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:08,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-12-06 20:52:09,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:52:09,055 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:09,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:09,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2119385473, now seen corresponding path program 58 times [2021-12-06 20:52:09,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:09,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874078175] [2021-12-06 20:52:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:09,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 841 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:10,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:10,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874078175] [2021-12-06 20:52:10,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874078175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:52:10,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642691593] [2021-12-06 20:52:10,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:52:10,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:52:10,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:52:10,915 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:52:10,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-12-06 20:52:10,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:52:10,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:52:10,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 20:52:10,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:52:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:13,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:52:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:15,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642691593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:52:15,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:52:15,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 164 [2021-12-06 20:52:15,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59764408] [2021-12-06 20:52:15,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:52:15,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2021-12-06 20:52:15,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:15,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2021-12-06 20:52:15,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4923, Invalid=21809, Unknown=0, NotChecked=0, Total=26732 [2021-12-06 20:52:15,282 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 164 states, 164 states have (on average 2.018292682926829) internal successors, (331), 164 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:17,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:17,416 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2021-12-06 20:52:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-06 20:52:17,417 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.018292682926829) internal successors, (331), 164 states have internal predecessors, (331), 0 states have call successors, (0), 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 137 [2021-12-06 20:52:17,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:17,417 INFO L225 Difference]: With dead ends: 215 [2021-12-06 20:52:17,417 INFO L226 Difference]: Without dead ends: 209 [2021-12-06 20:52:17,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 174 SyntacticMatches, 4 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17185 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9877, Invalid=29129, Unknown=0, NotChecked=0, Total=39006 [2021-12-06 20:52:17,419 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 400 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:17,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 68 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:52:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-06 20:52:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2021-12-06 20:52:17,504 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 20:52:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2021-12-06 20:52:17,504 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 137 [2021-12-06 20:52:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:17,504 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2021-12-06 20:52:17,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.018292682926829) internal successors, (331), 164 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2021-12-06 20:52:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 20:52:17,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:17,505 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:17,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-12-06 20:52:17,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-12-06 20:52:17,706 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:17,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:17,707 INFO L85 PathProgramCache]: Analyzing trace with hash -639036703, now seen corresponding path program 59 times [2021-12-06 20:52:17,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:17,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000334455] [2021-12-06 20:52:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:17,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 900 proven. 1022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:19,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:19,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000334455] [2021-12-06 20:52:19,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000334455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:52:19,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342411060] [2021-12-06 20:52:19,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:52:19,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:52:19,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:52:19,183 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:52:19,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-12-06 20:52:19,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-12-06 20:52:19,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:52:19,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 20:52:19,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:52:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:22,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:52:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:24,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342411060] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:52:24,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:52:24,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 171 [2021-12-06 20:52:24,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763720652] [2021-12-06 20:52:24,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:52:24,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2021-12-06 20:52:24,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:24,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2021-12-06 20:52:24,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5174, Invalid=23896, Unknown=0, NotChecked=0, Total=29070 [2021-12-06 20:52:24,449 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand has 171 states, 171 states have (on average 1.9824561403508771) internal successors, (339), 171 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:29,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:29,172 INFO L93 Difference]: Finished difference Result 363 states and 368 transitions. [2021-12-06 20:52:29,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-06 20:52:29,173 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.9824561403508771) internal successors, (339), 171 states have internal predecessors, (339), 0 states have call successors, (0), 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 139 [2021-12-06 20:52:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:29,173 INFO L225 Difference]: With dead ends: 363 [2021-12-06 20:52:29,173 INFO L226 Difference]: Without dead ends: 288 [2021-12-06 20:52:29,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 173 SyntacticMatches, 4 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18085 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=8504, Invalid=35386, Unknown=0, NotChecked=0, Total=43890 [2021-12-06 20:52:29,175 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 306 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:29,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 162 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:52:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-12-06 20:52:29,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 210. [2021-12-06 20:52:29,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.0239234449760766) internal successors, (214), 209 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:29,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 214 transitions. [2021-12-06 20:52:29,262 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 214 transitions. Word has length 139 [2021-12-06 20:52:29,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:29,262 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 214 transitions. [2021-12-06 20:52:29,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.9824561403508771) internal successors, (339), 171 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:29,262 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 214 transitions. [2021-12-06 20:52:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 20:52:29,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:29,263 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:29,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-12-06 20:52:29,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-12-06 20:52:29,464 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:29,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:29,465 INFO L85 PathProgramCache]: Analyzing trace with hash -563982947, now seen corresponding path program 59 times [2021-12-06 20:52:29,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:29,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964303252] [2021-12-06 20:52:29,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:29,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 900 proven. 1022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:31,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:31,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964303252] [2021-12-06 20:52:31,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964303252] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:52:31,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617780101] [2021-12-06 20:52:31,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:52:31,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:52:31,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:52:31,544 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:52:31,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-12-06 20:52:31,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-12-06 20:52:31,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:52:31,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 20:52:31,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:52:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:34,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:52:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:36,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617780101] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:52:36,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:52:36,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 170 [2021-12-06 20:52:36,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030310944] [2021-12-06 20:52:36,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:52:36,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2021-12-06 20:52:36,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:36,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2021-12-06 20:52:36,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5196, Invalid=23534, Unknown=0, NotChecked=0, Total=28730 [2021-12-06 20:52:36,094 INFO L87 Difference]: Start difference. First operand 210 states and 214 transitions. Second operand has 170 states, 170 states have (on average 1.9941176470588236) internal successors, (339), 170 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:38,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:38,343 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2021-12-06 20:52:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-06 20:52:38,343 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 1.9941176470588236) internal successors, (339), 170 states have internal predecessors, (339), 0 states have call successors, (0), 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 139 [2021-12-06 20:52:38,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:38,343 INFO L225 Difference]: With dead ends: 233 [2021-12-06 20:52:38,343 INFO L226 Difference]: Without dead ends: 227 [2021-12-06 20:52:38,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18685 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=10636, Invalid=32006, Unknown=0, NotChecked=0, Total=42642 [2021-12-06 20:52:38,345 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 512 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:38,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 109 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:52:38,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-06 20:52:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2021-12-06 20:52:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.0236966824644549) internal successors, (216), 211 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2021-12-06 20:52:38,436 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 139 [2021-12-06 20:52:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:38,437 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2021-12-06 20:52:38,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 1.9941176470588236) internal successors, (339), 170 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2021-12-06 20:52:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 20:52:38,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:38,437 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:38,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-12-06 20:52:38,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-12-06 20:52:38,638 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:38,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:38,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1227332095, now seen corresponding path program 60 times [2021-12-06 20:52:38,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:38,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531041562] [2021-12-06 20:52:38,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:38,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 963 proven. 1022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:40,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:40,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531041562] [2021-12-06 20:52:40,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531041562] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:52:40,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523232323] [2021-12-06 20:52:40,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:52:40,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:52:40,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:52:40,063 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:52:40,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-12-06 20:52:40,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2021-12-06 20:52:40,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:52:40,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 20:52:40,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:52:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:42,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:52:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:44,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523232323] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:52:44,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:52:44,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 169 [2021-12-06 20:52:44,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566485364] [2021-12-06 20:52:44,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:52:44,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2021-12-06 20:52:44,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:44,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2021-12-06 20:52:44,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5194, Invalid=23198, Unknown=0, NotChecked=0, Total=28392 [2021-12-06 20:52:44,957 INFO L87 Difference]: Start difference. First operand 212 states and 216 transitions. Second operand has 169 states, 169 states have (on average 2.0059171597633134) internal successors, (339), 169 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:48,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:48,303 INFO L93 Difference]: Finished difference Result 287 states and 291 transitions. [2021-12-06 20:52:48,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-06 20:52:48,304 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.0059171597633134) internal successors, (339), 169 states have internal predecessors, (339), 0 states have call successors, (0), 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 141 [2021-12-06 20:52:48,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:48,304 INFO L225 Difference]: With dead ends: 287 [2021-12-06 20:52:48,304 INFO L226 Difference]: Without dead ends: 212 [2021-12-06 20:52:48,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17333 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=8319, Invalid=33501, Unknown=0, NotChecked=0, Total=41820 [2021-12-06 20:52:48,306 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 220 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:48,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 147 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:52:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-06 20:52:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2021-12-06 20:52:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.019047619047619) internal successors, (214), 210 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 214 transitions. [2021-12-06 20:52:48,397 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 214 transitions. Word has length 141 [2021-12-06 20:52:48,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:48,397 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 214 transitions. [2021-12-06 20:52:48,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 2.0059171597633134) internal successors, (339), 169 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:48,397 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 214 transitions. [2021-12-06 20:52:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 20:52:48,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:48,398 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:48,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-12-06 20:52:48,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-12-06 20:52:48,599 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:48,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:48,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1709902943, now seen corresponding path program 60 times [2021-12-06 20:52:48,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:48,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694348573] [2021-12-06 20:52:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:48,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 900 proven. 1085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:50,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:50,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694348573] [2021-12-06 20:52:50,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694348573] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:52:50,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439624448] [2021-12-06 20:52:50,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:52:50,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:52:50,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:52:50,611 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:52:50,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-12-06 20:52:50,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2021-12-06 20:52:50,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:52:50,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 20:52:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:52:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:53,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:52:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:55,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439624448] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:52:55,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:52:55,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 169 [2021-12-06 20:52:55,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309737794] [2021-12-06 20:52:55,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:52:55,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2021-12-06 20:52:55,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:55,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2021-12-06 20:52:55,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5225, Invalid=23167, Unknown=0, NotChecked=0, Total=28392 [2021-12-06 20:52:55,282 INFO L87 Difference]: Start difference. First operand 211 states and 214 transitions. Second operand has 169 states, 169 states have (on average 2.0177514792899407) internal successors, (341), 169 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:57,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:57,351 INFO L93 Difference]: Finished difference Result 221 states and 224 transitions. [2021-12-06 20:52:57,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 20:52:57,351 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.0177514792899407) internal successors, (341), 169 states have internal predecessors, (341), 0 states have call successors, (0), 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 141 [2021-12-06 20:52:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:57,352 INFO L225 Difference]: With dead ends: 221 [2021-12-06 20:52:57,352 INFO L226 Difference]: Without dead ends: 215 [2021-12-06 20:52:57,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18267 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=10482, Invalid=30930, Unknown=0, NotChecked=0, Total=41412 [2021-12-06 20:52:57,354 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 543 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:57,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 54 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:52:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-06 20:52:57,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2021-12-06 20:52:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0188679245283019) internal successors, (216), 212 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2021-12-06 20:52:57,444 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 141 [2021-12-06 20:52:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:57,444 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2021-12-06 20:52:57,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 2.0177514792899407) internal successors, (341), 169 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2021-12-06 20:52:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-06 20:52:57,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:57,444 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:57,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-12-06 20:52:57,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-12-06 20:52:57,646 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:57,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:57,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1479841599, now seen corresponding path program 61 times [2021-12-06 20:52:57,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:57,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855531176] [2021-12-06 20:52:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:57,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 961 proven. 1087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:59,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855531176] [2021-12-06 20:52:59,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855531176] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:52:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697975022] [2021-12-06 20:52:59,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:52:59,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:52:59,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:52:59,292 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:52:59,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-12-06 20:52:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:59,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 20:52:59,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:02,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:53:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:04,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697975022] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:53:04,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:53:04,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 176 [2021-12-06 20:53:04,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041951725] [2021-12-06 20:53:04,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:53:04,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2021-12-06 20:53:04,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:04,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2021-12-06 20:53:04,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5483, Invalid=25317, Unknown=0, NotChecked=0, Total=30800 [2021-12-06 20:53:04,417 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand has 176 states, 176 states have (on average 1.9829545454545454) internal successors, (349), 176 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:09,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:09,622 INFO L93 Difference]: Finished difference Result 373 states and 378 transitions. [2021-12-06 20:53:09,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-06 20:53:09,623 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 1.9829545454545454) internal successors, (349), 176 states have internal predecessors, (349), 0 states have call successors, (0), 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 143 [2021-12-06 20:53:09,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:09,623 INFO L225 Difference]: With dead ends: 373 [2021-12-06 20:53:09,623 INFO L226 Difference]: Without dead ends: 296 [2021-12-06 20:53:09,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19161 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=8997, Invalid=37443, Unknown=0, NotChecked=0, Total=46440 [2021-12-06 20:53:09,625 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 215 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:09,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 261 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:53:09,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-06 20:53:09,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 216. [2021-12-06 20:53:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0232558139534884) internal successors, (220), 215 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 220 transitions. [2021-12-06 20:53:09,718 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 220 transitions. Word has length 143 [2021-12-06 20:53:09,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:09,718 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 220 transitions. [2021-12-06 20:53:09,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 1.9829545454545454) internal successors, (349), 176 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:09,718 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 220 transitions. [2021-12-06 20:53:09,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-06 20:53:09,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:09,719 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:09,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-12-06 20:53:09,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:53:09,920 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:09,921 INFO L85 PathProgramCache]: Analyzing trace with hash -594465795, now seen corresponding path program 61 times [2021-12-06 20:53:09,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:09,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408990105] [2021-12-06 20:53:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:09,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 961 proven. 1087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:12,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:12,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408990105] [2021-12-06 20:53:12,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408990105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:53:12,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663016643] [2021-12-06 20:53:12,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:53:12,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:53:12,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:53:12,047 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:53:12,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-12-06 20:53:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:12,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 20:53:12,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:15,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:53:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:17,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663016643] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:53:17,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:53:17,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 175 [2021-12-06 20:53:17,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423179249] [2021-12-06 20:53:17,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:53:17,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2021-12-06 20:53:17,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:17,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2021-12-06 20:53:17,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5506, Invalid=24944, Unknown=0, NotChecked=0, Total=30450 [2021-12-06 20:53:17,083 INFO L87 Difference]: Start difference. First operand 216 states and 220 transitions. Second operand has 175 states, 175 states have (on average 1.9942857142857142) internal successors, (349), 175 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:19,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:19,509 INFO L93 Difference]: Finished difference Result 239 states and 242 transitions. [2021-12-06 20:53:19,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-06 20:53:19,509 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 1.9942857142857142) internal successors, (349), 175 states have internal predecessors, (349), 0 states have call successors, (0), 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 143 [2021-12-06 20:53:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:19,509 INFO L225 Difference]: With dead ends: 239 [2021-12-06 20:53:19,509 INFO L226 Difference]: Without dead ends: 233 [2021-12-06 20:53:19,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 178 SyntacticMatches, 5 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19813 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=11263, Invalid=33893, Unknown=0, NotChecked=0, Total=45156 [2021-12-06 20:53:19,511 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 329 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:19,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 114 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:53:19,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-06 20:53:19,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 218. [2021-12-06 20:53:19,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.023041474654378) internal successors, (222), 217 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 20:53:19,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 222 transitions. [2021-12-06 20:53:19,607 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 222 transitions. Word has length 143 [2021-12-06 20:53:19,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:19,607 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 222 transitions. [2021-12-06 20:53:19,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 175 states have (on average 1.9942857142857142) internal successors, (349), 175 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 222 transitions. [2021-12-06 20:53:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 20:53:19,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:19,607 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:19,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-12-06 20:53:19,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:53:19,809 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:19,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:19,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1998086239, now seen corresponding path program 62 times [2021-12-06 20:53:19,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:19,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100490365] [2021-12-06 20:53:19,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:19,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1026 proven. 1087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:21,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:21,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100490365] [2021-12-06 20:53:21,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100490365] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:53:21,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325331625] [2021-12-06 20:53:21,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:53:21,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:53:21,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:53:21,326 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:53:21,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-12-06 20:53:21,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:53:21,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:53:21,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 20:53:21,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1089 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:24,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:53:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1089 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:26,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325331625] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:53:26,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:53:26,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 174 [2021-12-06 20:53:26,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486622651] [2021-12-06 20:53:26,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:53:26,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2021-12-06 20:53:26,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:26,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2021-12-06 20:53:26,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5504, Invalid=24598, Unknown=0, NotChecked=0, Total=30102 [2021-12-06 20:53:26,558 INFO L87 Difference]: Start difference. First operand 218 states and 222 transitions. Second operand has 174 states, 174 states have (on average 2.0057471264367814) internal successors, (349), 174 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:30,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:30,189 INFO L93 Difference]: Finished difference Result 295 states and 299 transitions. [2021-12-06 20:53:30,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-06 20:53:30,189 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 2.0057471264367814) internal successors, (349), 174 states have internal predecessors, (349), 0 states have call successors, (0), 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 145 [2021-12-06 20:53:30,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:30,190 INFO L225 Difference]: With dead ends: 295 [2021-12-06 20:53:30,190 INFO L226 Difference]: Without dead ends: 218 [2021-12-06 20:53:30,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 185 SyntacticMatches, 3 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18386 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=8808, Invalid=35502, Unknown=0, NotChecked=0, Total=44310 [2021-12-06 20:53:30,192 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 169 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:30,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 70 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:53:30,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-06 20:53:30,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-12-06 20:53:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0185185185185186) internal successors, (220), 216 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 220 transitions. [2021-12-06 20:53:30,286 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 220 transitions. Word has length 145 [2021-12-06 20:53:30,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:30,287 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 220 transitions. [2021-12-06 20:53:30,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 174 states have (on average 2.0057471264367814) internal successors, (349), 174 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 220 transitions. [2021-12-06 20:53:30,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 20:53:30,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:30,287 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:30,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-12-06 20:53:30,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-12-06 20:53:30,488 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:30,489 INFO L85 PathProgramCache]: Analyzing trace with hash 119042879, now seen corresponding path program 62 times [2021-12-06 20:53:30,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:30,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141704158] [2021-12-06 20:53:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:30,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 961 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:32,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:32,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141704158] [2021-12-06 20:53:32,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141704158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:53:32,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019707866] [2021-12-06 20:53:32,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:53:32,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:53:32,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:53:32,548 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:53:32,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-12-06 20:53:32,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:53:32,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:53:32,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 20:53:32,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:35,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:53:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1089 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:37,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019707866] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:53:37,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:53:37,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 174 [2021-12-06 20:53:37,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582383653] [2021-12-06 20:53:37,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:53:37,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2021-12-06 20:53:37,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:37,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2021-12-06 20:53:37,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5536, Invalid=24566, Unknown=0, NotChecked=0, Total=30102 [2021-12-06 20:53:37,285 INFO L87 Difference]: Start difference. First operand 217 states and 220 transitions. Second operand has 174 states, 174 states have (on average 2.0172413793103448) internal successors, (351), 174 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:39,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:39,495 INFO L93 Difference]: Finished difference Result 227 states and 230 transitions. [2021-12-06 20:53:39,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-06 20:53:39,496 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 2.0172413793103448) internal successors, (351), 174 states have internal predecessors, (351), 0 states have call successors, (0), 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 145 [2021-12-06 20:53:39,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:39,496 INFO L225 Difference]: With dead ends: 227 [2021-12-06 20:53:39,496 INFO L226 Difference]: Without dead ends: 221 [2021-12-06 20:53:39,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 184 SyntacticMatches, 4 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19382 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=11105, Invalid=32785, Unknown=0, NotChecked=0, Total=43890 [2021-12-06 20:53:39,498 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 334 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:39,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 89 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:53:39,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-06 20:53:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2021-12-06 20:53:39,595 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 20:53:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2021-12-06 20:53:39,595 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 145 [2021-12-06 20:53:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:39,595 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2021-12-06 20:53:39,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 174 states have (on average 2.0172413793103448) internal successors, (351), 174 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2021-12-06 20:53:39,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 20:53:39,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:39,596 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:39,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-12-06 20:53:39,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:53:39,797 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:39,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1288005727, now seen corresponding path program 63 times [2021-12-06 20:53:39,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:39,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254763404] [2021-12-06 20:53:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:39,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1024 proven. 1154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:41,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:41,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254763404] [2021-12-06 20:53:41,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254763404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:53:41,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521300536] [2021-12-06 20:53:41,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:53:41,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:53:41,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:53:41,415 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:53:41,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-12-06 20:53:41,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-12-06 20:53:41,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:53:41,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 20:53:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:44,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:53:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:46,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521300536] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:53:46,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:53:46,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 181 [2021-12-06 20:53:46,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981636920] [2021-12-06 20:53:46,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:53:46,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 181 states [2021-12-06 20:53:46,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:46,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2021-12-06 20:53:46,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5801, Invalid=26779, Unknown=0, NotChecked=0, Total=32580 [2021-12-06 20:53:46,878 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand has 181 states, 181 states have (on average 1.9834254143646408) internal successors, (359), 181 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:52,338 INFO L93 Difference]: Finished difference Result 383 states and 388 transitions. [2021-12-06 20:53:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-06 20:53:52,338 INFO L78 Accepts]: Start accepts. Automaton has has 181 states, 181 states have (on average 1.9834254143646408) internal successors, (359), 181 states have internal predecessors, (359), 0 states have call successors, (0), 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 147 [2021-12-06 20:53:52,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:52,339 INFO L225 Difference]: With dead ends: 383 [2021-12-06 20:53:52,339 INFO L226 Difference]: Without dead ends: 304 [2021-12-06 20:53:52,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20268 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=9504, Invalid=39558, Unknown=0, NotChecked=0, Total=49062 [2021-12-06 20:53:52,340 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 282 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:52,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 137 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:53:52,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-12-06 20:53:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 222. [2021-12-06 20:53:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.0226244343891402) internal successors, (226), 221 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:52,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 226 transitions. [2021-12-06 20:53:52,434 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 226 transitions. Word has length 147 [2021-12-06 20:53:52,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:52,434 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 226 transitions. [2021-12-06 20:53:52,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 181 states, 181 states have (on average 1.9834254143646408) internal successors, (359), 181 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:52,434 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 226 transitions. [2021-12-06 20:53:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 20:53:52,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:52,435 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:52,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-12-06 20:53:52,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:53:52,636 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:52,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:52,637 INFO L85 PathProgramCache]: Analyzing trace with hash 927777629, now seen corresponding path program 63 times [2021-12-06 20:53:52,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:52,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332358185] [2021-12-06 20:53:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:52,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1024 proven. 1154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:54,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:54,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332358185] [2021-12-06 20:53:54,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332358185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:53:54,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746880225] [2021-12-06 20:53:54,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:53:54,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:53:54,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:53:54,827 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:53:54,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-12-06 20:53:54,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-12-06 20:53:54,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:53:54,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 20:53:54,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:58,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:53:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:59,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746880225] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:53:59,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:53:59,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 180 [2021-12-06 20:53:59,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523482194] [2021-12-06 20:53:59,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:53:59,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 180 states [2021-12-06 20:53:59,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2021-12-06 20:53:59,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5825, Invalid=26395, Unknown=0, NotChecked=0, Total=32220 [2021-12-06 20:53:59,951 INFO L87 Difference]: Start difference. First operand 222 states and 226 transitions. Second operand has 180 states, 180 states have (on average 1.9944444444444445) internal successors, (359), 180 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:02,332 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2021-12-06 20:54:02,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-06 20:54:02,332 INFO L78 Accepts]: Start accepts. Automaton has has 180 states, 180 states have (on average 1.9944444444444445) internal successors, (359), 180 states have internal predecessors, (359), 0 states have call successors, (0), 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 147 [2021-12-06 20:54:02,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:02,332 INFO L225 Difference]: With dead ends: 245 [2021-12-06 20:54:02,332 INFO L226 Difference]: Without dead ends: 239 [2021-12-06 20:54:02,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 183 SyntacticMatches, 5 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20974 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=11908, Invalid=35834, Unknown=0, NotChecked=0, Total=47742 [2021-12-06 20:54:02,334 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 167 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:02,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 112 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:54:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-06 20:54:02,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 224. [2021-12-06 20:54:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0224215246636772) internal successors, (228), 223 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:02,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 228 transitions. [2021-12-06 20:54:02,436 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 228 transitions. Word has length 147 [2021-12-06 20:54:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:02,436 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 228 transitions. [2021-12-06 20:54:02,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 180 states, 180 states have (on average 1.9944444444444445) internal successors, (359), 180 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:02,436 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 228 transitions. [2021-12-06 20:54:02,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-06 20:54:02,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:02,437 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:02,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-12-06 20:54:02,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:54:02,638 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:02,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:02,638 INFO L85 PathProgramCache]: Analyzing trace with hash 290168767, now seen corresponding path program 64 times [2021-12-06 20:54:02,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:54:02,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509132865] [2021-12-06 20:54:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:02,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:54:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1091 proven. 1154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:54:04,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:54:04,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509132865] [2021-12-06 20:54:04,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509132865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:54:04,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139395069] [2021-12-06 20:54:04,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:54:04,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:54:04,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:54:04,227 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:54:04,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-12-06 20:54:04,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:54:04,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:54:04,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 20:54:04,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1156 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:54:07,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:54:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1156 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:54:09,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139395069] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:54:09,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:54:09,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 179 [2021-12-06 20:54:09,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446597622] [2021-12-06 20:54:09,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:54:09,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2021-12-06 20:54:09,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:54:09,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-12-06 20:54:09,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5823, Invalid=26039, Unknown=0, NotChecked=0, Total=31862 [2021-12-06 20:54:09,479 INFO L87 Difference]: Start difference. First operand 224 states and 228 transitions. Second operand has 179 states, 179 states have (on average 2.005586592178771) internal successors, (359), 179 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:13,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:13,139 INFO L93 Difference]: Finished difference Result 303 states and 307 transitions. [2021-12-06 20:54:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-06 20:54:13,140 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 2.005586592178771) internal successors, (359), 179 states have internal predecessors, (359), 0 states have call successors, (0), 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 149 [2021-12-06 20:54:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:13,140 INFO L225 Difference]: With dead ends: 303 [2021-12-06 20:54:13,140 INFO L226 Difference]: Without dead ends: 224 [2021-12-06 20:54:13,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19470 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=9311, Invalid=37561, Unknown=0, NotChecked=0, Total=46872 [2021-12-06 20:54:13,142 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 203 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:13,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 100 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:54:13,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-06 20:54:13,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2021-12-06 20:54:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.018018018018018) internal successors, (226), 222 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:13,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 226 transitions. [2021-12-06 20:54:13,238 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 226 transitions. Word has length 149 [2021-12-06 20:54:13,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:13,238 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 226 transitions. [2021-12-06 20:54:13,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 2.005586592178771) internal successors, (359), 179 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:13,238 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 226 transitions. [2021-12-06 20:54:13,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-06 20:54:13,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:13,239 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:13,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-12-06 20:54:13,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-12-06 20:54:13,440 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:13,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:13,440 INFO L85 PathProgramCache]: Analyzing trace with hash 937571103, now seen corresponding path program 64 times [2021-12-06 20:54:13,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:54:13,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203825885] [2021-12-06 20:54:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:13,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:54:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1024 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:54:15,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:54:15,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203825885] [2021-12-06 20:54:15,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203825885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:54:15,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232422992] [2021-12-06 20:54:15,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:54:15,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:54:15,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:54:15,708 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:54:15,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-12-06 20:54:15,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:54:15,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:54:15,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 20:54:15,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1089 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:54:18,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:54:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1156 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:54:20,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232422992] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:54:20,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:54:20,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 179 [2021-12-06 20:54:20,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862403877] [2021-12-06 20:54:20,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:54:20,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2021-12-06 20:54:20,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:54:20,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-12-06 20:54:20,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5856, Invalid=26006, Unknown=0, NotChecked=0, Total=31862 [2021-12-06 20:54:20,811 INFO L87 Difference]: Start difference. First operand 223 states and 226 transitions. Second operand has 179 states, 179 states have (on average 2.016759776536313) internal successors, (361), 179 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:23,232 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2021-12-06 20:54:23,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-06 20:54:23,233 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 2.016759776536313) internal successors, (361), 179 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-12-06 20:54:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:23,233 INFO L225 Difference]: With dead ends: 233 [2021-12-06 20:54:23,233 INFO L226 Difference]: Without dead ends: 227 [2021-12-06 20:54:23,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 189 SyntacticMatches, 4 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20530 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=11746, Invalid=34694, Unknown=0, NotChecked=0, Total=46440 [2021-12-06 20:54:23,235 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 574 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:23,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 81 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:54:23,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-06 20:54:23,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2021-12-06 20:54:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0178571428571428) internal successors, (228), 224 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 228 transitions. [2021-12-06 20:54:23,349 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 228 transitions. Word has length 149 [2021-12-06 20:54:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:23,349 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 228 transitions. [2021-12-06 20:54:23,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 2.016759776536313) internal successors, (361), 179 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 228 transitions. [2021-12-06 20:54:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-06 20:54:23,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:23,349 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:23,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-12-06 20:54:23,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-12-06 20:54:23,550 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:23,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:23,551 INFO L85 PathProgramCache]: Analyzing trace with hash -661397631, now seen corresponding path program 65 times [2021-12-06 20:54:23,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:54:23,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722174037] [2021-12-06 20:54:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:23,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:54:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1089 proven. 1223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:54:25,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:54:25,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722174037] [2021-12-06 20:54:25,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722174037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:54:25,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018765925] [2021-12-06 20:54:25,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:54:25,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:54:25,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:54:25,222 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:54:25,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-12-06 20:54:25,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-12-06 20:54:25,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:54:25,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 20:54:25,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:54:28,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:54:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:54:31,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018765925] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:54:31,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:54:31,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 186 [2021-12-06 20:54:31,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142407021] [2021-12-06 20:54:31,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:54:31,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 186 states [2021-12-06 20:54:31,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:54:31,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2021-12-06 20:54:31,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6128, Invalid=28282, Unknown=0, NotChecked=0, Total=34410 [2021-12-06 20:54:31,402 INFO L87 Difference]: Start difference. First operand 225 states and 228 transitions. Second operand has 186 states, 186 states have (on average 1.9838709677419355) internal successors, (369), 186 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:37,232 INFO L93 Difference]: Finished difference Result 393 states and 398 transitions. [2021-12-06 20:54:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-06 20:54:37,233 INFO L78 Accepts]: Start accepts. Automaton has has 186 states, 186 states have (on average 1.9838709677419355) internal successors, (369), 186 states have internal predecessors, (369), 0 states have call successors, (0), 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 151 [2021-12-06 20:54:37,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:37,233 INFO L225 Difference]: With dead ends: 393 [2021-12-06 20:54:37,233 INFO L226 Difference]: Without dead ends: 312 [2021-12-06 20:54:37,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 188 SyntacticMatches, 4 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21406 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=10025, Invalid=41731, Unknown=0, NotChecked=0, Total=51756 [2021-12-06 20:54:37,235 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 274 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:37,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 163 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:54:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-12-06 20:54:37,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 228. [2021-12-06 20:54:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.0220264317180616) internal successors, (232), 227 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 232 transitions. [2021-12-06 20:54:37,339 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 232 transitions. Word has length 151 [2021-12-06 20:54:37,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:37,340 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 232 transitions. [2021-12-06 20:54:37,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 186 states, 186 states have (on average 1.9838709677419355) internal successors, (369), 186 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 232 transitions. [2021-12-06 20:54:37,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-06 20:54:37,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:37,340 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:37,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-12-06 20:54:37,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-12-06 20:54:37,542 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:37,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:37,543 INFO L85 PathProgramCache]: Analyzing trace with hash 175788989, now seen corresponding path program 65 times [2021-12-06 20:54:37,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:54:37,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095408837] [2021-12-06 20:54:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:37,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:54:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1089 proven. 1223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:54:39,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:54:39,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095408837] [2021-12-06 20:54:39,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095408837] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:54:39,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369100851] [2021-12-06 20:54:39,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:54:39,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:54:39,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:54:39,884 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:54:39,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-12-06 20:54:39,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-12-06 20:54:39,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:54:39,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 20:54:39,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:54:43,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:54:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:54:45,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369100851] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:54:45,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:54:45,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 185 [2021-12-06 20:54:45,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372067699] [2021-12-06 20:54:45,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:54:45,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2021-12-06 20:54:45,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:54:45,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2021-12-06 20:54:45,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6153, Invalid=27887, Unknown=0, NotChecked=0, Total=34040 [2021-12-06 20:54:45,144 INFO L87 Difference]: Start difference. First operand 228 states and 232 transitions. Second operand has 185 states, 185 states have (on average 1.9945945945945946) internal successors, (369), 185 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:47,761 INFO L93 Difference]: Finished difference Result 251 states and 254 transitions. [2021-12-06 20:54:47,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-06 20:54:47,761 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 1.9945945945945946) internal successors, (369), 185 states have internal predecessors, (369), 0 states have call successors, (0), 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 151 [2021-12-06 20:54:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:47,762 INFO L225 Difference]: With dead ends: 251 [2021-12-06 20:54:47,762 INFO L226 Difference]: Without dead ends: 245 [2021-12-06 20:54:47,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 188 SyntacticMatches, 5 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22168 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=12571, Invalid=37829, Unknown=0, NotChecked=0, Total=50400 [2021-12-06 20:54:47,764 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 441 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:47,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 147 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:54:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-06 20:54:47,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 230. [2021-12-06 20:54:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.0218340611353711) internal successors, (234), 229 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 20:54:47,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 234 transitions. [2021-12-06 20:54:47,873 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 234 transitions. Word has length 151 [2021-12-06 20:54:47,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:47,873 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 234 transitions. [2021-12-06 20:54:47,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 1.9945945945945946) internal successors, (369), 185 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:47,874 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 234 transitions. [2021-12-06 20:54:47,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-06 20:54:47,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:47,874 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:47,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-12-06 20:54:48,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-12-06 20:54:48,075 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:48,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:48,076 INFO L85 PathProgramCache]: Analyzing trace with hash -816408545, now seen corresponding path program 66 times [2021-12-06 20:54:48,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:54:48,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513868191] [2021-12-06 20:54:48,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:48,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:54:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1158 proven. 1223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:54:49,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:54:49,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513868191] [2021-12-06 20:54:49,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513868191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:54:49,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860544818] [2021-12-06 20:54:49,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:54:49,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:54:49,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:54:49,664 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:54:49,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-12-06 20:54:49,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2021-12-06 20:54:49,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:54:49,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 20:54:49,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1225 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:54:52,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:54:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1225 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:54:55,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860544818] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:54:55,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:54:55,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 184 [2021-12-06 20:54:55,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725351910] [2021-12-06 20:54:55,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:54:55,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2021-12-06 20:54:55,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:54:55,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2021-12-06 20:54:55,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6151, Invalid=27521, Unknown=0, NotChecked=0, Total=33672 [2021-12-06 20:54:55,218 INFO L87 Difference]: Start difference. First operand 230 states and 234 transitions. Second operand has 184 states, 184 states have (on average 2.005434782608696) internal successors, (369), 184 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:59,130 INFO L93 Difference]: Finished difference Result 311 states and 315 transitions. [2021-12-06 20:54:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-06 20:54:59,130 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 184 states have (on average 2.005434782608696) internal successors, (369), 184 states have internal predecessors, (369), 0 states have call successors, (0), 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 153 [2021-12-06 20:54:59,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:59,131 INFO L225 Difference]: With dead ends: 311 [2021-12-06 20:54:59,131 INFO L226 Difference]: Without dead ends: 230 [2021-12-06 20:54:59,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20585 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=9828, Invalid=39678, Unknown=0, NotChecked=0, Total=49506 [2021-12-06 20:54:59,133 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 168 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:59,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 113 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:54:59,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-06 20:54:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2021-12-06 20:54:59,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0175438596491229) internal successors, (232), 228 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 232 transitions. [2021-12-06 20:54:59,234 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 232 transitions. Word has length 153 [2021-12-06 20:54:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:59,234 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 232 transitions. [2021-12-06 20:54:59,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 184 states have (on average 2.005434782608696) internal successors, (369), 184 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 232 transitions. [2021-12-06 20:54:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-06 20:54:59,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:59,235 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:59,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-12-06 20:54:59,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:54:59,436 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:59,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1088785407, now seen corresponding path program 66 times [2021-12-06 20:54:59,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:54:59,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011226529] [2021-12-06 20:54:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:59,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:54:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1089 proven. 1292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:01,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:01,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011226529] [2021-12-06 20:55:01,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011226529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:55:01,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634215491] [2021-12-06 20:55:01,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:55:01,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:01,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:55:01,797 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:55:01,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-12-06 20:55:01,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2021-12-06 20:55:01,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:55:01,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 20:55:01,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1156 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:04,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:55:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1225 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:07,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634215491] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:55:07,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:55:07,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 184 [2021-12-06 20:55:07,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815985816] [2021-12-06 20:55:07,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:55:07,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2021-12-06 20:55:07,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:55:07,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2021-12-06 20:55:07,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6185, Invalid=27487, Unknown=0, NotChecked=0, Total=33672 [2021-12-06 20:55:07,150 INFO L87 Difference]: Start difference. First operand 229 states and 232 transitions. Second operand has 184 states, 184 states have (on average 2.016304347826087) internal successors, (371), 184 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:09,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:09,754 INFO L93 Difference]: Finished difference Result 239 states and 242 transitions. [2021-12-06 20:55:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-06 20:55:09,754 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 184 states have (on average 2.016304347826087) internal successors, (371), 184 states have internal predecessors, (371), 0 states have call successors, (0), 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 153 [2021-12-06 20:55:09,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:09,754 INFO L225 Difference]: With dead ends: 239 [2021-12-06 20:55:09,755 INFO L226 Difference]: Without dead ends: 233 [2021-12-06 20:55:09,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 194 SyntacticMatches, 4 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21711 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=12405, Invalid=36657, Unknown=0, NotChecked=0, Total=49062 [2021-12-06 20:55:09,756 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 390 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:09,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 108 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1617 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 20:55:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-06 20:55:09,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 231. [2021-12-06 20:55:09,863 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 20:55:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 234 transitions. [2021-12-06 20:55:09,863 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 234 transitions. Word has length 153 [2021-12-06 20:55:09,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:09,864 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 234 transitions. [2021-12-06 20:55:09,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 184 states have (on average 2.016304347826087) internal successors, (371), 184 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:09,864 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 234 transitions. [2021-12-06 20:55:09,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-06 20:55:09,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:09,864 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:09,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-12-06 20:55:10,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-12-06 20:55:10,065 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:10,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:10,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1373339551, now seen corresponding path program 67 times [2021-12-06 20:55:10,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:55:10,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968858268] [2021-12-06 20:55:10,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:10,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:55:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1156 proven. 1294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:11,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:11,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968858268] [2021-12-06 20:55:11,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968858268] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:55:11,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872659632] [2021-12-06 20:55:11,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:55:11,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:11,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:55:11,873 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:55:11,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-12-06 20:55:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:11,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 20:55:11,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1225 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:15,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:55:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1225 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:17,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872659632] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:55:17,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:55:17,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 191 [2021-12-06 20:55:17,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270546894] [2021-12-06 20:55:17,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:55:17,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2021-12-06 20:55:17,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:55:17,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2021-12-06 20:55:17,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6464, Invalid=29826, Unknown=0, NotChecked=0, Total=36290 [2021-12-06 20:55:17,888 INFO L87 Difference]: Start difference. First operand 231 states and 234 transitions. Second operand has 191 states, 191 states have (on average 1.9842931937172774) internal successors, (379), 191 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 20:55:23,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:23,450 INFO L93 Difference]: Finished difference Result 403 states and 408 transitions. [2021-12-06 20:55:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-06 20:55:23,450 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 1.9842931937172774) internal successors, (379), 191 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 155 [2021-12-06 20:55:23,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:23,451 INFO L225 Difference]: With dead ends: 403 [2021-12-06 20:55:23,451 INFO L226 Difference]: Without dead ends: 320 [2021-12-06 20:55:23,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 193 SyntacticMatches, 4 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22575 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=10560, Invalid=43962, Unknown=0, NotChecked=0, Total=54522 [2021-12-06 20:55:23,453 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 425 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:23,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 140 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:55:23,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-06 20:55:23,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 234. [2021-12-06 20:55:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.0214592274678111) internal successors, (238), 233 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 238 transitions. [2021-12-06 20:55:23,563 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 238 transitions. Word has length 155 [2021-12-06 20:55:23,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:23,563 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 238 transitions. [2021-12-06 20:55:23,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 1.9842931937172774) internal successors, (379), 191 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 20:55:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 238 transitions. [2021-12-06 20:55:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-06 20:55:23,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:23,564 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:23,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-12-06 20:55:23,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-12-06 20:55:23,764 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:23,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1777278237, now seen corresponding path program 67 times [2021-12-06 20:55:23,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:55:23,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405104131] [2021-12-06 20:55:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:23,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:55:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1156 proven. 1294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:26,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:26,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405104131] [2021-12-06 20:55:26,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405104131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:55:26,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675529835] [2021-12-06 20:55:26,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:55:26,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:26,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:55:26,213 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:55:26,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-12-06 20:55:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:26,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 20:55:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1225 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:29,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:55:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1225 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:31,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675529835] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:55:31,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:55:31,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 190 [2021-12-06 20:55:31,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578770362] [2021-12-06 20:55:31,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:55:31,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2021-12-06 20:55:31,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:55:31,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2021-12-06 20:55:31,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6490, Invalid=29420, Unknown=0, NotChecked=0, Total=35910 [2021-12-06 20:55:31,770 INFO L87 Difference]: Start difference. First operand 234 states and 238 transitions. Second operand has 190 states, 190 states have (on average 1.9947368421052631) internal successors, (379), 190 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 20:55:34,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:34,455 INFO L93 Difference]: Finished difference Result 257 states and 260 transitions. [2021-12-06 20:55:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-06 20:55:34,456 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 190 states have (on average 1.9947368421052631) internal successors, (379), 190 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 155 [2021-12-06 20:55:34,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:34,456 INFO L225 Difference]: With dead ends: 257 [2021-12-06 20:55:34,456 INFO L226 Difference]: Without dead ends: 251 [2021-12-06 20:55:34,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 193 SyntacticMatches, 5 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23395 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=13252, Invalid=39878, Unknown=0, NotChecked=0, Total=53130 [2021-12-06 20:55:34,458 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 480 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:34,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 88 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:55:34,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-06 20:55:34,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 236. [2021-12-06 20:55:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.0212765957446808) internal successors, (240), 235 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 240 transitions. [2021-12-06 20:55:34,569 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 240 transitions. Word has length 155 [2021-12-06 20:55:34,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:34,569 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 240 transitions. [2021-12-06 20:55:34,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 1.9947368421052631) internal successors, (379), 190 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 20:55:34,569 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 240 transitions. [2021-12-06 20:55:34,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 20:55:34,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:34,570 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:34,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-12-06 20:55:34,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:34,771 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash 616466815, now seen corresponding path program 68 times [2021-12-06 20:55:34,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:55:34,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100344035] [2021-12-06 20:55:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:34,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:55:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 1227 proven. 1294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:36,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:36,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100344035] [2021-12-06 20:55:36,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100344035] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:55:36,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686171804] [2021-12-06 20:55:36,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:55:36,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:36,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:55:36,517 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:55:36,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-12-06 20:55:36,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:55:36,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:55:36,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-06 20:55:36,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 1296 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:39,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:55:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 1296 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:42,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686171804] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:55:42,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:55:42,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 189 [2021-12-06 20:55:42,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062356564] [2021-12-06 20:55:42,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:55:42,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2021-12-06 20:55:42,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:55:42,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2021-12-06 20:55:42,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6488, Invalid=29044, Unknown=0, NotChecked=0, Total=35532 [2021-12-06 20:55:42,237 INFO L87 Difference]: Start difference. First operand 236 states and 240 transitions. Second operand has 189 states, 189 states have (on average 2.005291005291005) internal successors, (379), 189 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 20:55:46,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:46,323 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2021-12-06 20:55:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-06 20:55:46,324 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 2.005291005291005) internal successors, (379), 189 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 157 [2021-12-06 20:55:46,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:46,324 INFO L225 Difference]: With dead ends: 319 [2021-12-06 20:55:46,324 INFO L226 Difference]: Without dead ends: 236 [2021-12-06 20:55:46,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 200 SyntacticMatches, 3 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21731 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=10359, Invalid=41853, Unknown=0, NotChecked=0, Total=52212 [2021-12-06 20:55:46,326 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 254 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:46,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 136 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:55:46,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-06 20:55:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-12-06 20:55:46,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.017094017094017) internal successors, (238), 234 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:46,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 238 transitions. [2021-12-06 20:55:46,442 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 238 transitions. Word has length 157 [2021-12-06 20:55:46,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:46,442 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 238 transitions. [2021-12-06 20:55:46,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 2.005291005291005) internal successors, (379), 189 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 20:55:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 238 transitions. [2021-12-06 20:55:46,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 20:55:46,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:46,442 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:46,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-12-06 20:55:46,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:46,643 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:46,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:46,644 INFO L85 PathProgramCache]: Analyzing trace with hash 78626271, now seen corresponding path program 68 times [2021-12-06 20:55:46,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:55:46,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783145193] [2021-12-06 20:55:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:46,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:55:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 1156 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:49,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:49,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783145193] [2021-12-06 20:55:49,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783145193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:55:49,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092271657] [2021-12-06 20:55:49,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:55:49,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:49,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:55:49,066 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:55:49,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-12-06 20:55:49,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:55:49,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:55:49,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-06 20:55:49,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 1225 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:52,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:55:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 1296 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:54,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092271657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:55:54,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:55:54,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 189 [2021-12-06 20:55:54,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713439401] [2021-12-06 20:55:54,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:55:54,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2021-12-06 20:55:54,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:55:54,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2021-12-06 20:55:54,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6523, Invalid=29009, Unknown=0, NotChecked=0, Total=35532 [2021-12-06 20:55:54,660 INFO L87 Difference]: Start difference. First operand 235 states and 238 transitions. Second operand has 189 states, 189 states have (on average 2.015873015873016) internal successors, (381), 189 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:57,294 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2021-12-06 20:55:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-06 20:55:57,294 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 2.015873015873016) internal successors, (381), 189 states have internal predecessors, (381), 0 states have call successors, (0), 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 157 [2021-12-06 20:55:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:57,295 INFO L225 Difference]: With dead ends: 245 [2021-12-06 20:55:57,295 INFO L226 Difference]: Without dead ends: 239 [2021-12-06 20:55:57,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 199 SyntacticMatches, 4 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22925 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=13082, Invalid=38674, Unknown=0, NotChecked=0, Total=51756 [2021-12-06 20:55:57,297 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 584 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:57,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 74 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:55:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-06 20:55:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2021-12-06 20:55:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0169491525423728) internal successors, (240), 236 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 240 transitions. [2021-12-06 20:55:57,413 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 240 transitions. Word has length 157 [2021-12-06 20:55:57,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:57,413 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 240 transitions. [2021-12-06 20:55:57,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 2.015873015873016) internal successors, (381), 189 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:57,413 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 240 transitions. [2021-12-06 20:55:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-06 20:55:57,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:57,414 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:57,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-12-06 20:55:57,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-12-06 20:55:57,615 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1473660351, now seen corresponding path program 69 times [2021-12-06 20:55:57,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:55:57,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675015621] [2021-12-06 20:55:57,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:57,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:55:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1225 proven. 1367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:59,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675015621] [2021-12-06 20:55:59,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675015621] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:55:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928023186] [2021-12-06 20:55:59,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:55:59,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:59,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:55:59,453 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:55:59,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-12-06 20:55:59,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2021-12-06 20:55:59,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:55:59,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 20:55:59,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:56:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1296 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:56:03,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:56:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1296 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:56:06,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928023186] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:56:06,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:56:06,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 196 [2021-12-06 20:56:06,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669975574] [2021-12-06 20:56:06,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:56:06,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2021-12-06 20:56:06,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:56:06,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2021-12-06 20:56:06,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6809, Invalid=31411, Unknown=0, NotChecked=0, Total=38220 [2021-12-06 20:56:06,090 INFO L87 Difference]: Start difference. First operand 237 states and 240 transitions. Second operand has 196 states, 196 states have (on average 1.9846938775510203) internal successors, (389), 196 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:56:11,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:56:11,982 INFO L93 Difference]: Finished difference Result 413 states and 418 transitions. [2021-12-06 20:56:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-06 20:56:11,983 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 1.9846938775510203) internal successors, (389), 196 states have internal predecessors, (389), 0 states have call successors, (0), 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 159 [2021-12-06 20:56:11,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:56:11,983 INFO L225 Difference]: With dead ends: 413 [2021-12-06 20:56:11,984 INFO L226 Difference]: Without dead ends: 328 [2021-12-06 20:56:11,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 198 SyntacticMatches, 4 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23775 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=11109, Invalid=46251, Unknown=0, NotChecked=0, Total=57360 [2021-12-06 20:56:11,986 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 285 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:56:11,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 226 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:56:11,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-12-06 20:56:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 240. [2021-12-06 20:56:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.0209205020920502) internal successors, (244), 239 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 20:56:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 244 transitions. [2021-12-06 20:56:12,101 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 244 transitions. Word has length 159 [2021-12-06 20:56:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:56:12,101 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 244 transitions. [2021-12-06 20:56:12,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 1.9846938775510203) internal successors, (389), 196 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:56:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 244 transitions. [2021-12-06 20:56:12,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-06 20:56:12,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:56:12,102 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:56:12,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-12-06 20:56:12,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:56:12,303 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:56:12,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:56:12,304 INFO L85 PathProgramCache]: Analyzing trace with hash 91250557, now seen corresponding path program 69 times [2021-12-06 20:56:12,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:56:12,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122494900] [2021-12-06 20:56:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:56:12,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:56:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:56:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1225 proven. 1367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:56:14,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:56:14,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122494900] [2021-12-06 20:56:14,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122494900] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:56:14,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612032460] [2021-12-06 20:56:14,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:56:14,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:56:14,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:56:14,964 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:56:14,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-12-06 20:56:15,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2021-12-06 20:56:15,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:56:15,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 20:56:15,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:56:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1296 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:56:18,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:56:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1296 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:56:20,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612032460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:56:20,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:56:20,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 195 [2021-12-06 20:56:20,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478715586] [2021-12-06 20:56:20,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:56:20,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2021-12-06 20:56:20,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:56:20,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2021-12-06 20:56:20,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6836, Invalid=30994, Unknown=0, NotChecked=0, Total=37830 [2021-12-06 20:56:20,852 INFO L87 Difference]: Start difference. First operand 240 states and 244 transitions. Second operand has 195 states, 195 states have (on average 1.994871794871795) internal successors, (389), 195 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:56:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:56:23,674 INFO L93 Difference]: Finished difference Result 263 states and 266 transitions. [2021-12-06 20:56:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-12-06 20:56:23,674 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 1.994871794871795) internal successors, (389), 195 states have internal predecessors, (389), 0 states have call successors, (0), 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 159 [2021-12-06 20:56:23,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:56:23,675 INFO L225 Difference]: With dead ends: 263 [2021-12-06 20:56:23,675 INFO L226 Difference]: Without dead ends: 257 [2021-12-06 20:56:23,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 198 SyntacticMatches, 5 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24655 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=13951, Invalid=41981, Unknown=0, NotChecked=0, Total=55932 [2021-12-06 20:56:23,677 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 521 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:56:23,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 95 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:56:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-06 20:56:23,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 242. [2021-12-06 20:56:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.020746887966805) internal successors, (246), 241 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 20:56:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 246 transitions. [2021-12-06 20:56:23,796 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 246 transitions. Word has length 159 [2021-12-06 20:56:23,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:56:23,796 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 246 transitions. [2021-12-06 20:56:23,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 1.994871794871795) internal successors, (389), 195 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:56:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 246 transitions. [2021-12-06 20:56:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-06 20:56:23,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:56:23,797 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:56:23,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-12-06 20:56:23,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:56:23,997 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:56:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:56:23,998 INFO L85 PathProgramCache]: Analyzing trace with hash -453463073, now seen corresponding path program 70 times [2021-12-06 20:56:23,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:56:23,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138335122] [2021-12-06 20:56:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:56:23,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:56:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:56:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 1298 proven. 1367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:56:25,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:56:25,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138335122] [2021-12-06 20:56:25,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138335122] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:56:25,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239937320] [2021-12-06 20:56:25,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:56:25,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:56:25,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:56:25,800 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:56:25,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee817f3-f8a7-476a-887a-b0cc3bf1dcd5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-12-06 20:56:25,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:56:25,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:56:25,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-06 20:56:25,840 INFO L286 TraceCheckSpWp]: Computing forward predicates...