./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX --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 a8f602fe3f26a1a48cfc4520a058a139a989329a9c65c27b1560937231a92c27 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:57:15,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:57:15,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:57:15,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:57:15,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:57:15,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:57:15,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:57:15,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:57:15,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:57:15,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:57:15,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:57:15,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:57:15,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:57:15,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:57:15,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:57:15,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:57:15,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:57:15,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:57:15,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:57:15,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:57:15,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:57:15,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:57:15,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:57:15,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:57:15,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:57:15,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:57:15,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:57:15,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:57:15,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:57:15,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:57:15,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:57:15,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:57:15,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:57:15,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:57:15,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:57:15,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:57:15,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:57:15,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:57:15,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:57:15,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:57:15,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:57:15,467 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:57:15,492 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:57:15,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:57:15,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:57:15,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:57:15,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:57:15,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:57:15,495 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:57:15,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:57:15,496 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:57:15,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:57:15,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:57:15,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:57:15,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:57:15,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:57:15,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:57:15,497 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:57:15,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:57:15,498 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:57:15,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:57:15,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:57:15,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:57:15,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:57:15,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:57:15,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:57:15,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:57:15,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:57:15,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:57:15,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:57:15,501 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:57:15,502 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:57:15,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:57:15,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:57:15,502 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_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8f602fe3f26a1a48cfc4520a058a139a989329a9c65c27b1560937231a92c27 [2021-11-09 08:57:15,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:57:15,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:57:15,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:57:15,829 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:57:15,836 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:57:15,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-programs/partial_mod_count_3.c [2021-11-09 08:57:15,925 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/data/454a2b785/a19ef790de894ebdac5d2f179e9119cf/FLAGbada5e162 [2021-11-09 08:57:16,461 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:57:16,462 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/sv-benchmarks/c/array-programs/partial_mod_count_3.c [2021-11-09 08:57:16,477 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/data/454a2b785/a19ef790de894ebdac5d2f179e9119cf/FLAGbada5e162 [2021-11-09 08:57:16,815 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/data/454a2b785/a19ef790de894ebdac5d2f179e9119cf [2021-11-09 08:57:16,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:57:16,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:57:16,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:57:16,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:57:16,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:57:16,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:57:16" (1/1) ... [2021-11-09 08:57:16,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@328d03b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:16, skipping insertion in model container [2021-11-09 08:57:16,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:57:16" (1/1) ... [2021-11-09 08:57:16,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:57:16,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:57:17,071 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/sv-benchmarks/c/array-programs/partial_mod_count_3.c[323,336] [2021-11-09 08:57:17,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:57:17,108 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:57:17,122 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/sv-benchmarks/c/array-programs/partial_mod_count_3.c[323,336] [2021-11-09 08:57:17,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:57:17,155 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:57:17,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:17 WrapperNode [2021-11-09 08:57:17,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:57:17,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:57:17,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:57:17,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:57:17,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:17" (1/1) ... [2021-11-09 08:57:17,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:17" (1/1) ... [2021-11-09 08:57:17,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:57:17,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:57:17,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:57:17,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:57:17,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:17" (1/1) ... [2021-11-09 08:57:17,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:17" (1/1) ... [2021-11-09 08:57:17,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:17" (1/1) ... [2021-11-09 08:57:17,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:17" (1/1) ... [2021-11-09 08:57:17,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:17" (1/1) ... [2021-11-09 08:57:17,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:17" (1/1) ... [2021-11-09 08:57:17,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:17" (1/1) ... [2021-11-09 08:57:17,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:57:17,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:57:17,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:57:17,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:57:17,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:17" (1/1) ... [2021-11-09 08:57:17,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:57:17,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:17,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:57:17,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:57:17,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:57:17,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:57:17,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:57:17,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:57:17,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:57:17,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:57:17,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:57:17,701 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:57:17,702 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-09 08:57:17,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:57:17 BoogieIcfgContainer [2021-11-09 08:57:17,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:57:17,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:57:17,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:57:17,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:57:17,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:57:16" (1/3) ... [2021-11-09 08:57:17,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25157311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:57:17, skipping insertion in model container [2021-11-09 08:57:17,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:17" (2/3) ... [2021-11-09 08:57:17,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25157311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:57:17, skipping insertion in model container [2021-11-09 08:57:17,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:57:17" (3/3) ... [2021-11-09 08:57:17,727 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_3.c [2021-11-09 08:57:17,732 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:57:17,732 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:57:17,828 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:57:17,846 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 08:57:17,846 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:57:17,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) [2021-11-09 08:57:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 08:57:17,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:17,872 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:17,873 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:17,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:17,886 INFO L85 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2021-11-09 08:57:17,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:17,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663306078] [2021-11-09 08:57:17,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:17,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:18,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:18,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663306078] [2021-11-09 08:57:18,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663306078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:18,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:57:18,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:57:18,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682876115] [2021-11-09 08:57:18,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:57:18,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:18,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:57:18,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:57:18,145 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:18,160 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-09 08:57:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:57:18,162 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-09 08:57:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:18,170 INFO L225 Difference]: With dead ends: 29 [2021-11-09 08:57:18,170 INFO L226 Difference]: Without dead ends: 13 [2021-11-09 08:57:18,173 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:57:18,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-09 08:57:18,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-09 08:57:18,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-09 08:57:18,208 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2021-11-09 08:57:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:18,209 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-09 08:57:18,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-09 08:57:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 08:57:18,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:18,211 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:18,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:57:18,212 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:18,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2021-11-09 08:57:18,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:18,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120028993] [2021-11-09 08:57:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:18,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:18,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:18,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120028993] [2021-11-09 08:57:18,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120028993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:18,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:57:18,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:57:18,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591122565] [2021-11-09 08:57:18,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:57:18,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:18,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:57:18,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:57:18,360 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:18,431 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-11-09 08:57:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:57:18,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-09 08:57:18,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:18,434 INFO L225 Difference]: With dead ends: 34 [2021-11-09 08:57:18,434 INFO L226 Difference]: Without dead ends: 23 [2021-11-09 08:57:18,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:57:18,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-09 08:57:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2021-11-09 08:57:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-11-09 08:57:18,451 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2021-11-09 08:57:18,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:18,452 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-11-09 08:57:18,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-11-09 08:57:18,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:57:18,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:18,454 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:18,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:57:18,455 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2021-11-09 08:57:18,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:18,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701286226] [2021-11-09 08:57:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:18,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:18,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:18,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701286226] [2021-11-09 08:57:18,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701286226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:18,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975094442] [2021-11-09 08:57:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:18,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:18,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:18,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:18,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:57:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:18,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:57:18,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:18,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975094442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:18,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:18,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-09 08:57:18,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280708478] [2021-11-09 08:57:18,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:57:18,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:18,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:57:18,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:57:18,895 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:18,976 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-11-09 08:57:18,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:57:18,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-09 08:57:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:18,978 INFO L225 Difference]: With dead ends: 44 [2021-11-09 08:57:18,978 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 08:57:18,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:57:18,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 08:57:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2021-11-09 08:57:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-09 08:57:18,991 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-11-09 08:57:18,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:18,992 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-09 08:57:18,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,992 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-09 08:57:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 08:57:18,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:18,993 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:19,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:19,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:19,208 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:19,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:19,208 INFO L85 PathProgramCache]: Analyzing trace with hash 982026547, now seen corresponding path program 2 times [2021-11-09 08:57:19,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:19,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558728436] [2021-11-09 08:57:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:19,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:19,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:19,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558728436] [2021-11-09 08:57:19,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558728436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:19,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407877887] [2021-11-09 08:57:19,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:57:19,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:19,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:19,348 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:19,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:57:19,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-09 08:57:19,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:19,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:57:19,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:57:19,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407877887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:19,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:19,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-09 08:57:19,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219148823] [2021-11-09 08:57:19,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:57:19,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:19,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:57:19,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:57:19,690 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:19,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:19,805 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-11-09 08:57:19,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:57:19,806 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-09 08:57:19,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:19,807 INFO L225 Difference]: With dead ends: 35 [2021-11-09 08:57:19,807 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 08:57:19,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:57:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 08:57:19,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-11-09 08:57:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2021-11-09 08:57:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-09 08:57:19,813 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2021-11-09 08:57:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:19,813 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-09 08:57:19,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-09 08:57:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 08:57:19,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:19,815 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:19,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:20,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:20,016 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:20,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1305492527, now seen corresponding path program 1 times [2021-11-09 08:57:20,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:20,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231870023] [2021-11-09 08:57:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:20,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:57:20,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:20,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231870023] [2021-11-09 08:57:20,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231870023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:20,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648051295] [2021-11-09 08:57:20,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:20,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:20,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:20,124 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:20,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:57:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:20,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:57:20,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:57:20,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648051295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:20,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:20,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-09 08:57:20,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440305772] [2021-11-09 08:57:20,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:57:20,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:20,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:57:20,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:57:20,358 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:20,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:20,430 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2021-11-09 08:57:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:57:20,431 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-09 08:57:20,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:20,433 INFO L225 Difference]: With dead ends: 93 [2021-11-09 08:57:20,433 INFO L226 Difference]: Without dead ends: 72 [2021-11-09 08:57:20,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:57:20,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-09 08:57:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2021-11-09 08:57:20,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2021-11-09 08:57:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-11-09 08:57:20,440 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2021-11-09 08:57:20,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:20,441 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-11-09 08:57:20,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:20,441 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-11-09 08:57:20,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 08:57:20,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:20,442 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:20,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:20,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:20,668 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:20,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:20,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1739926453, now seen corresponding path program 2 times [2021-11-09 08:57:20,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:20,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484119697] [2021-11-09 08:57:20,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:20,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:57:20,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:20,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484119697] [2021-11-09 08:57:20,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484119697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:20,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975071315] [2021-11-09 08:57:20,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:57:20,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:20,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:20,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:20,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:57:20,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:57:20,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:20,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:57:20,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:57:20,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975071315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:20,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:20,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-09 08:57:20,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104433751] [2021-11-09 08:57:20,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:57:20,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:20,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:57:20,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:57:20,996 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:21,089 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2021-11-09 08:57:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:57:21,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 [2021-11-09 08:57:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:21,091 INFO L225 Difference]: With dead ends: 113 [2021-11-09 08:57:21,091 INFO L226 Difference]: Without dead ends: 92 [2021-11-09 08:57:21,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:57:21,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-09 08:57:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 34. [2021-11-09 08:57:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-09 08:57:21,098 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2021-11-09 08:57:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:21,099 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-09 08:57:21,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-09 08:57:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:57:21,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:21,100 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:21,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:21,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 08:57:21,316 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:21,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:21,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1070414225, now seen corresponding path program 3 times [2021-11-09 08:57:21,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:21,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285213678] [2021-11-09 08:57:21,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:21,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:57:21,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:21,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285213678] [2021-11-09 08:57:21,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285213678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:21,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321613250] [2021-11-09 08:57:21,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:57:21,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:21,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:21,438 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:21,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:57:21,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 08:57:21,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:21,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:57:21,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-09 08:57:21,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321613250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:21,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:21,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-09 08:57:21,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244021494] [2021-11-09 08:57:21,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:57:21,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:21,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:57:21,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:57:21,691 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:21,767 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2021-11-09 08:57:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:57:21,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 08:57:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:21,769 INFO L225 Difference]: With dead ends: 79 [2021-11-09 08:57:21,769 INFO L226 Difference]: Without dead ends: 61 [2021-11-09 08:57:21,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:57:21,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-09 08:57:21,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2021-11-09 08:57:21,778 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) [2021-11-09 08:57:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-09 08:57:21,780 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2021-11-09 08:57:21,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:21,781 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-09 08:57:21,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,781 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-09 08:57:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 08:57:21,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:21,784 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:21,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:22,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 08:57:22,005 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:22,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:22,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1120934345, now seen corresponding path program 1 times [2021-11-09 08:57:22,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:22,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294717854] [2021-11-09 08:57:22,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:22,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:22,023 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:22,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100288767] [2021-11-09 08:57:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:22,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:22,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:22,025 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:22,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:57:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:22,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:57:22,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:57:22,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:22,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294717854] [2021-11-09 08:57:22,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:22,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100288767] [2021-11-09 08:57:22,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100288767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:22,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:22,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 08:57:22,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125043399] [2021-11-09 08:57:22,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:57:22,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:22,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:57:22,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:57:22,404 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:22,522 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2021-11-09 08:57:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:57:22,523 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-11-09 08:57:22,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:22,524 INFO L225 Difference]: With dead ends: 157 [2021-11-09 08:57:22,525 INFO L226 Difference]: Without dead ends: 134 [2021-11-09 08:57:22,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:57:22,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-09 08:57:22,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2021-11-09 08:57:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:22,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-09 08:57:22,534 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2021-11-09 08:57:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:22,535 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-09 08:57:22,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:22,535 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-09 08:57:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 08:57:22,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:22,544 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:22,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:22,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:22,745 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:22,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:22,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2107317257, now seen corresponding path program 2 times [2021-11-09 08:57:22,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:22,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624598375] [2021-11-09 08:57:22,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:22,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:22,766 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:22,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363298391] [2021-11-09 08:57:22,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:57:22,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:22,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:22,776 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:22,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:57:22,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:57:22,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:22,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:57:22,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:57:23,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:23,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624598375] [2021-11-09 08:57:23,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:23,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363298391] [2021-11-09 08:57:23,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363298391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:23,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:23,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 08:57:23,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024506804] [2021-11-09 08:57:23,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:57:23,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:23,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:57:23,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:57:23,201 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-11-09 08:57:23,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:23,357 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2021-11-09 08:57:23,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:57:23,358 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) Word has length 35 [2021-11-09 08:57:23,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:23,359 INFO L225 Difference]: With dead ends: 197 [2021-11-09 08:57:23,359 INFO L226 Difference]: Without dead ends: 174 [2021-11-09 08:57:23,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:57:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-09 08:57:23,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2021-11-09 08:57:23,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:23,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-11-09 08:57:23,369 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2021-11-09 08:57:23,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:23,369 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-11-09 08:57:23,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-11-09 08:57:23,370 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-11-09 08:57:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 08:57:23,371 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:23,371 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:23,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:23,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:23,592 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:23,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:23,592 INFO L85 PathProgramCache]: Analyzing trace with hash -975924809, now seen corresponding path program 3 times [2021-11-09 08:57:23,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:23,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654733738] [2021-11-09 08:57:23,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:23,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:23,606 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:23,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084322992] [2021-11-09 08:57:23,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:57:23,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:23,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:23,608 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:23,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:57:23,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 08:57:23,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:23,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:57:23,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-09 08:57:24,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:24,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654733738] [2021-11-09 08:57:24,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:24,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084322992] [2021-11-09 08:57:24,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084322992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:24,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:24,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 08:57:24,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996940139] [2021-11-09 08:57:24,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:57:24,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:24,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:57:24,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:57:24,039 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:24,117 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-11-09 08:57:24,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:57:24,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-09 08:57:24,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:24,119 INFO L225 Difference]: With dead ends: 60 [2021-11-09 08:57:24,119 INFO L226 Difference]: Without dead ends: 58 [2021-11-09 08:57:24,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:57:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-09 08:57:24,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-11-09 08:57:24,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 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) [2021-11-09 08:57:24,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-11-09 08:57:24,126 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2021-11-09 08:57:24,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:24,127 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-11-09 08:57:24,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:24,127 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-11-09 08:57:24,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:57:24,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:24,129 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:24,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:24,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:57:24,352 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:24,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:24,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2047403563, now seen corresponding path program 4 times [2021-11-09 08:57:24,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:24,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387601581] [2021-11-09 08:57:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:24,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:24,367 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:24,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597821722] [2021-11-09 08:57:24,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:57:24,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:24,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:24,369 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:24,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:57:24,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:57:24,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:24,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:57:24,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-09 08:57:24,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:24,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387601581] [2021-11-09 08:57:24,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:24,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597821722] [2021-11-09 08:57:24,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597821722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:24,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:24,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-09 08:57:24,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267971982] [2021-11-09 08:57:24,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:57:24,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:24,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:57:24,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:57:24,834 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:25,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:25,055 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2021-11-09 08:57:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:57:25,056 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 08:57:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:25,057 INFO L225 Difference]: With dead ends: 211 [2021-11-09 08:57:25,058 INFO L226 Difference]: Without dead ends: 188 [2021-11-09 08:57:25,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=114, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:57:25,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-09 08:57:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 56. [2021-11-09 08:57:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-11-09 08:57:25,066 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2021-11-09 08:57:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:25,067 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-11-09 08:57:25,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-11-09 08:57:25,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:57:25,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:25,068 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:25,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:25,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:25,288 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:25,288 INFO L85 PathProgramCache]: Analyzing trace with hash -520854285, now seen corresponding path program 5 times [2021-11-09 08:57:25,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:25,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792300189] [2021-11-09 08:57:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:25,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:25,303 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:25,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403267952] [2021-11-09 08:57:25,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:57:25,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:25,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:25,305 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:25,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:57:25,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-09 08:57:25,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:25,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:57:25,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-09 08:57:25,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:25,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792300189] [2021-11-09 08:57:25,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:25,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403267952] [2021-11-09 08:57:25,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403267952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:25,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:25,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-09 08:57:25,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089219791] [2021-11-09 08:57:25,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:57:25,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:25,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:57:25,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:57:25,932 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-11-09 08:57:26,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:26,112 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2021-11-09 08:57:26,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:57:26,112 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) Word has length 49 [2021-11-09 08:57:26,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:26,115 INFO L225 Difference]: With dead ends: 314 [2021-11-09 08:57:26,115 INFO L226 Difference]: Without dead ends: 283 [2021-11-09 08:57:26,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:57:26,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-09 08:57:26,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 65. [2021-11-09 08:57:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.125) internal successors, (72), 64 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) [2021-11-09 08:57:26,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-11-09 08:57:26,135 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2021-11-09 08:57:26,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:26,135 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-11-09 08:57:26,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-11-09 08:57:26,136 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-11-09 08:57:26,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 08:57:26,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:26,141 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:26,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:26,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 08:57:26,346 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:26,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:26,347 INFO L85 PathProgramCache]: Analyzing trace with hash -69913235, now seen corresponding path program 6 times [2021-11-09 08:57:26,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:26,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017742423] [2021-11-09 08:57:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:26,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:26,364 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:26,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674972019] [2021-11-09 08:57:26,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:57:26,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:26,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:26,366 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:26,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:57:26,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 08:57:26,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:26,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:57:26,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 08:57:26,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:26,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017742423] [2021-11-09 08:57:26,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:26,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674972019] [2021-11-09 08:57:26,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674972019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:26,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:26,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 08:57:26,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331869889] [2021-11-09 08:57:26,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:57:26,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:26,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:57:26,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:57:26,977 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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) [2021-11-09 08:57:27,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:27,074 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-11-09 08:57:27,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:57:27,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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 58 [2021-11-09 08:57:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:27,077 INFO L225 Difference]: With dead ends: 77 [2021-11-09 08:57:27,077 INFO L226 Difference]: Without dead ends: 75 [2021-11-09 08:57:27,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:57:27,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-09 08:57:27,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-11-09 08:57:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 69 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) [2021-11-09 08:57:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-11-09 08:57:27,093 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2021-11-09 08:57:27,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:27,093 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-11-09 08:57:27,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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) [2021-11-09 08:57:27,094 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-11-09 08:57:27,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 08:57:27,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:27,096 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:27,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:27,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 08:57:27,312 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:27,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:27,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1619534901, now seen corresponding path program 7 times [2021-11-09 08:57:27,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:27,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941634419] [2021-11-09 08:57:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:27,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:27,329 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:27,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910618786] [2021-11-09 08:57:27,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:57:27,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:27,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:27,331 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:27,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:57:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:27,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:57:27,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-09 08:57:28,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:28,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941634419] [2021-11-09 08:57:28,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:28,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910618786] [2021-11-09 08:57:28,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910618786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:28,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:28,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-09 08:57:28,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431571728] [2021-11-09 08:57:28,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 08:57:28,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:28,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 08:57:28,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:57:28,047 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:28,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:28,262 INFO L93 Difference]: Finished difference Result 450 states and 529 transitions. [2021-11-09 08:57:28,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:57:28,262 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-11-09 08:57:28,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:28,265 INFO L225 Difference]: With dead ends: 450 [2021-11-09 08:57:28,265 INFO L226 Difference]: Without dead ends: 414 [2021-11-09 08:57:28,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:57:28,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-09 08:57:28,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 79. [2021-11-09 08:57:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 78 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-11-09 08:57:28,276 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2021-11-09 08:57:28,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:28,277 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-11-09 08:57:28,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:28,277 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-11-09 08:57:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 08:57:28,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:28,278 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 14, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:28,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:28,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 08:57:28,504 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:28,504 INFO L85 PathProgramCache]: Analyzing trace with hash 206411567, now seen corresponding path program 8 times [2021-11-09 08:57:28,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:28,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418198427] [2021-11-09 08:57:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:28,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:28,520 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:28,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921925920] [2021-11-09 08:57:28,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:57:28,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:28,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:28,522 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:28,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:57:28,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:57:28,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:28,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:57:28,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-09 08:57:29,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:29,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418198427] [2021-11-09 08:57:29,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:29,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921925920] [2021-11-09 08:57:29,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921925920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:29,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:29,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-09 08:57:29,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883394929] [2021-11-09 08:57:29,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:57:29,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:29,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:57:29,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:57:29,390 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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) [2021-11-09 08:57:29,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:29,665 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2021-11-09 08:57:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:57:29,666 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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 72 [2021-11-09 08:57:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:29,669 INFO L225 Difference]: With dead ends: 540 [2021-11-09 08:57:29,669 INFO L226 Difference]: Without dead ends: 504 [2021-11-09 08:57:29,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:57:29,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-09 08:57:29,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 88. [2021-11-09 08:57:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.103448275862069) internal successors, (96), 87 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-11-09 08:57:29,686 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 72 [2021-11-09 08:57:29,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:29,686 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-11-09 08:57:29,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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) [2021-11-09 08:57:29,686 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-11-09 08:57:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 08:57:29,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:29,687 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:29,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:29,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:29,903 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:29,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:29,903 INFO L85 PathProgramCache]: Analyzing trace with hash 306240885, now seen corresponding path program 9 times [2021-11-09 08:57:29,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:29,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799397816] [2021-11-09 08:57:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:29,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:29,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:29,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150357758] [2021-11-09 08:57:29,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:57:29,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:29,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:29,940 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:29,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:57:30,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:57:30,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:30,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:57:30,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 08:57:30,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:30,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799397816] [2021-11-09 08:57:30,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:30,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150357758] [2021-11-09 08:57:30,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150357758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:30,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:30,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 08:57:30,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911235968] [2021-11-09 08:57:30,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:57:30,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:30,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:57:30,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:57:30,808 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:30,918 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2021-11-09 08:57:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:57:30,918 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-09 08:57:30,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:30,919 INFO L225 Difference]: With dead ends: 100 [2021-11-09 08:57:30,919 INFO L226 Difference]: Without dead ends: 98 [2021-11-09 08:57:30,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:57:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-09 08:57:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-11-09 08:57:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.108695652173913) internal successors, (102), 92 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) [2021-11-09 08:57:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-11-09 08:57:30,928 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 81 [2021-11-09 08:57:30,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:30,929 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-11-09 08:57:30,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-11-09 08:57:30,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-09 08:57:30,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:30,935 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 17, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:30,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:31,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:31,160 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:31,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:31,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1355563309, now seen corresponding path program 10 times [2021-11-09 08:57:31,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:31,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706841966] [2021-11-09 08:57:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:31,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:31,187 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:31,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786898703] [2021-11-09 08:57:31,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:57:31,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:31,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:31,189 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:31,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:57:31,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:57:31,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:31,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 08:57:31,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 508 proven. 24 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 08:57:32,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:32,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706841966] [2021-11-09 08:57:32,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:32,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786898703] [2021-11-09 08:57:32,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786898703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:32,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:32,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-09 08:57:32,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615755670] [2021-11-09 08:57:32,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 08:57:32,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:32,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 08:57:32,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:57:32,143 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:32,664 INFO L93 Difference]: Finished difference Result 580 states and 680 transitions. [2021-11-09 08:57:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:57:32,665 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-09 08:57:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:32,668 INFO L225 Difference]: With dead ends: 580 [2021-11-09 08:57:32,668 INFO L226 Difference]: Without dead ends: 547 [2021-11-09 08:57:32,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:57:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-09 08:57:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 96. [2021-11-09 08:57:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1157894736842104) internal successors, (106), 95 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) [2021-11-09 08:57:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-11-09 08:57:32,681 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 86 [2021-11-09 08:57:32,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:32,681 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-11-09 08:57:32,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-11-09 08:57:32,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-09 08:57:32,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:32,683 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 17, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:32,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:32,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:57:32,908 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:32,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1036957617, now seen corresponding path program 11 times [2021-11-09 08:57:32,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:32,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191602587] [2021-11-09 08:57:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:32,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:32,924 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:32,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928600420] [2021-11-09 08:57:32,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:57:32,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:32,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:32,926 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:32,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:57:33,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-11-09 08:57:33,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:33,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 08:57:33,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 08:57:34,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:34,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191602587] [2021-11-09 08:57:34,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:34,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928600420] [2021-11-09 08:57:34,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928600420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:34,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:34,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-09 08:57:34,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660621860] [2021-11-09 08:57:34,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 08:57:34,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:34,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 08:57:34,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:57:34,349 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 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) [2021-11-09 08:57:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:34,713 INFO L93 Difference]: Finished difference Result 757 states and 892 transitions. [2021-11-09 08:57:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 08:57:34,714 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 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 89 [2021-11-09 08:57:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:34,718 INFO L225 Difference]: With dead ends: 757 [2021-11-09 08:57:34,719 INFO L226 Difference]: Without dead ends: 713 [2021-11-09 08:57:34,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:57:34,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-11-09 08:57:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 108. [2021-11-09 08:57:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.102803738317757) internal successors, (118), 107 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) [2021-11-09 08:57:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-11-09 08:57:34,734 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 89 [2021-11-09 08:57:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:34,735 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-11-09 08:57:34,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 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) [2021-11-09 08:57:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-11-09 08:57:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-09 08:57:34,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:34,736 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 21, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:34,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:34,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:57:34,944 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:34,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:34,944 INFO L85 PathProgramCache]: Analyzing trace with hash -445045967, now seen corresponding path program 12 times [2021-11-09 08:57:34,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:34,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610469220] [2021-11-09 08:57:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:34,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:34,963 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:34,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246376365] [2021-11-09 08:57:34,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:57:34,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:34,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:34,965 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:34,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:57:35,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-09 08:57:35,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:35,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:57:35,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-11-09 08:57:36,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:36,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610469220] [2021-11-09 08:57:36,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:36,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246376365] [2021-11-09 08:57:36,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246376365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:36,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:36,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 08:57:36,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756477053] [2021-11-09 08:57:36,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:57:36,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:36,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:57:36,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:57:36,150 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-11-09 08:57:36,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:36,271 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2021-11-09 08:57:36,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:57:36,272 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) Word has length 101 [2021-11-09 08:57:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:36,273 INFO L225 Difference]: With dead ends: 120 [2021-11-09 08:57:36,273 INFO L226 Difference]: Without dead ends: 118 [2021-11-09 08:57:36,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:57:36,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-09 08:57:36,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2021-11-09 08:57:36,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1071428571428572) internal successors, (124), 112 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) [2021-11-09 08:57:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2021-11-09 08:57:36,289 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 101 [2021-11-09 08:57:36,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:36,290 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2021-11-09 08:57:36,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-11-09 08:57:36,290 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2021-11-09 08:57:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 08:57:36,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:36,290 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 21, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:36,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:36,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:36,491 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:36,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:36,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1077530383, now seen corresponding path program 13 times [2021-11-09 08:57:36,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:36,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148548671] [2021-11-09 08:57:36,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:36,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:36,511 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:36,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332989100] [2021-11-09 08:57:36,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:57:36,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:36,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:36,517 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:36,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:57:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:36,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 08:57:36,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 08:57:37,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:37,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148548671] [2021-11-09 08:57:37,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:37,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332989100] [2021-11-09 08:57:37,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332989100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:37,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:37,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-09 08:57:37,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234894352] [2021-11-09 08:57:37,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 08:57:37,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:37,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 08:57:37,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:57:37,881 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:38,372 INFO L93 Difference]: Finished difference Result 1003 states and 1183 transitions. [2021-11-09 08:57:38,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:57:38,373 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-09 08:57:38,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:38,379 INFO L225 Difference]: With dead ends: 1003 [2021-11-09 08:57:38,380 INFO L226 Difference]: Without dead ends: 954 [2021-11-09 08:57:38,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:57:38,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-11-09 08:57:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 125. [2021-11-09 08:57:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.096774193548387) internal successors, (136), 124 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:38,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-11-09 08:57:38,400 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 106 [2021-11-09 08:57:38,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:38,401 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-11-09 08:57:38,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:38,401 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-11-09 08:57:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-09 08:57:38,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:38,402 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 25, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:38,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:38,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:38,624 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:38,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:38,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1674589553, now seen corresponding path program 14 times [2021-11-09 08:57:38,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:38,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616387957] [2021-11-09 08:57:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:38,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:38,646 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:38,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437679918] [2021-11-09 08:57:38,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:57:38,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:38,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:38,647 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:38,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:57:39,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:57:39,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:39,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 08:57:39,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 08:57:40,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:40,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616387957] [2021-11-09 08:57:40,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:40,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437679918] [2021-11-09 08:57:40,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437679918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:40,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:40,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-11-09 08:57:40,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812110228] [2021-11-09 08:57:40,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 08:57:40,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:40,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 08:57:40,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:57:40,233 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand has 32 states, 32 states have (on average 2.96875) internal successors, (95), 31 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:40,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:40,711 INFO L93 Difference]: Finished difference Result 1163 states and 1371 transitions. [2021-11-09 08:57:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 08:57:40,713 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.96875) internal successors, (95), 31 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-09 08:57:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:40,719 INFO L225 Difference]: With dead ends: 1163 [2021-11-09 08:57:40,719 INFO L226 Difference]: Without dead ends: 1114 [2021-11-09 08:57:40,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:57:40,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-11-09 08:57:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 137. [2021-11-09 08:57:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.088235294117647) internal successors, (148), 136 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) [2021-11-09 08:57:40,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2021-11-09 08:57:40,740 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 118 [2021-11-09 08:57:40,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:40,741 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2021-11-09 08:57:40,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.96875) internal successors, (95), 31 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:40,741 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2021-11-09 08:57:40,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-09 08:57:40,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:40,743 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 29, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:40,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:40,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:40,964 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:40,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1770554895, now seen corresponding path program 15 times [2021-11-09 08:57:40,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:40,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546158962] [2021-11-09 08:57:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:40,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:40,992 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:40,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868841141] [2021-11-09 08:57:40,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:57:40,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:40,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:40,994 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:41,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:57:41,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 08:57:41,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:41,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:57:41,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-11-09 08:57:42,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:42,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546158962] [2021-11-09 08:57:42,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:42,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868841141] [2021-11-09 08:57:42,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868841141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:42,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:42,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 08:57:42,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698607037] [2021-11-09 08:57:42,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:57:42,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:42,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:57:42,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:57:42,647 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:42,775 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2021-11-09 08:57:42,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:57:42,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-09 08:57:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:42,778 INFO L225 Difference]: With dead ends: 149 [2021-11-09 08:57:42,779 INFO L226 Difference]: Without dead ends: 147 [2021-11-09 08:57:42,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:57:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-09 08:57:42,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2021-11-09 08:57:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0921985815602837) internal successors, (154), 141 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) [2021-11-09 08:57:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2021-11-09 08:57:42,794 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 130 [2021-11-09 08:57:42,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:42,794 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2021-11-09 08:57:42,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:42,795 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2021-11-09 08:57:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-09 08:57:42,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:42,796 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 29, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:42,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:43,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 08:57:43,008 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:43,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:43,008 INFO L85 PathProgramCache]: Analyzing trace with hash 99619377, now seen corresponding path program 16 times [2021-11-09 08:57:43,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:43,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143133592] [2021-11-09 08:57:43,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:43,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:43,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:43,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45848135] [2021-11-09 08:57:43,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:57:43,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:43,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:43,038 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:43,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 08:57:43,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:57:43,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:43,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 08:57:43,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 1476 proven. 44 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-09 08:57:44,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:44,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143133592] [2021-11-09 08:57:44,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:44,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45848135] [2021-11-09 08:57:44,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45848135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:44,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:44,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-11-09 08:57:44,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308088225] [2021-11-09 08:57:44,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 08:57:44,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:44,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 08:57:44,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=665, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:57:44,752 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:45,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:45,851 INFO L93 Difference]: Finished difference Result 1247 states and 1469 transitions. [2021-11-09 08:57:45,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 08:57:45,852 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have 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 [2021-11-09 08:57:45,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:45,858 INFO L225 Difference]: With dead ends: 1247 [2021-11-09 08:57:45,858 INFO L226 Difference]: Without dead ends: 1204 [2021-11-09 08:57:45,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=854, Invalid=952, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 08:57:45,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-11-09 08:57:45,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 145. [2021-11-09 08:57:45,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0972222222222223) internal successors, (158), 144 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:45,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2021-11-09 08:57:45,886 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 135 [2021-11-09 08:57:45,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:45,887 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2021-11-09 08:57:45,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:45,887 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2021-11-09 08:57:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-09 08:57:45,889 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:45,889 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 29, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:45,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-09 08:57:46,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:46,108 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:46,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:46,108 INFO L85 PathProgramCache]: Analyzing trace with hash -274498259, now seen corresponding path program 17 times [2021-11-09 08:57:46,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:46,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762070743] [2021-11-09 08:57:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:46,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:46,132 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:46,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551761049] [2021-11-09 08:57:46,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:57:46,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:46,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:46,134 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:46,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 08:57:52,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-11-09 08:57:52,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:52,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 08:57:52,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-09 08:57:54,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:54,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762070743] [2021-11-09 08:57:54,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:54,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551761049] [2021-11-09 08:57:54,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551761049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:54,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:54,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-11-09 08:57:54,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676685526] [2021-11-09 08:57:54,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 08:57:54,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:54,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 08:57:54,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:57:54,175 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand has 37 states, 37 states have (on average 2.972972972972973) internal successors, (110), 36 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:54,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:54,993 INFO L93 Difference]: Finished difference Result 1515 states and 1790 transitions. [2021-11-09 08:57:54,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 08:57:54,994 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.972972972972973) internal successors, (110), 36 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-09 08:57:54,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:55,001 INFO L225 Difference]: With dead ends: 1515 [2021-11-09 08:57:55,001 INFO L226 Difference]: Without dead ends: 1458 [2021-11-09 08:57:55,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:57:55,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-11-09 08:57:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 160. [2021-11-09 08:57:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0880503144654088) internal successors, (173), 159 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2021-11-09 08:57:55,029 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 138 [2021-11-09 08:57:55,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:55,029 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2021-11-09 08:57:55,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.972972972972973) internal successors, (110), 36 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:55,030 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2021-11-09 08:57:55,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-09 08:57:55,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:55,031 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 34, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:55,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:55,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:55,248 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:55,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:55,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1459861581, now seen corresponding path program 18 times [2021-11-09 08:57:55,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:55,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093818325] [2021-11-09 08:57:55,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:55,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:55,286 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:55,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042110392] [2021-11-09 08:57:55,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:57:55,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:55,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:55,288 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:55,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 08:57:56,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-09 08:57:56,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:56,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:57:56,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2021-11-09 08:57:57,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:57,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093818325] [2021-11-09 08:57:57,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:57:57,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042110392] [2021-11-09 08:57:57,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042110392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:57,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:57,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 08:57:57,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123444065] [2021-11-09 08:57:57,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:57:57,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:57,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:57:57,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:57:57,563 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:57,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:57,731 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2021-11-09 08:57:57,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:57:57,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2021-11-09 08:57:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:57,732 INFO L225 Difference]: With dead ends: 172 [2021-11-09 08:57:57,733 INFO L226 Difference]: Without dead ends: 170 [2021-11-09 08:57:57,733 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:57:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-09 08:57:57,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2021-11-09 08:57:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0914634146341464) internal successors, (179), 164 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2021-11-09 08:57:57,762 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 153 [2021-11-09 08:57:57,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:57,763 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2021-11-09 08:57:57,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:57,763 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2021-11-09 08:57:57,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-09 08:57:57,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:57,765 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 34, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:57,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-09 08:57:57,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 08:57:57,980 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:57,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:57,980 INFO L85 PathProgramCache]: Analyzing trace with hash 40865199, now seen corresponding path program 19 times [2021-11-09 08:57:57,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:57,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797352413] [2021-11-09 08:57:57,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:57,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:58,013 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:57:58,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892244988] [2021-11-09 08:57:58,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:57:58,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:58,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:58,017 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:58,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 08:57:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:58,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 08:57:58,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-09 08:58:00,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:00,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797352413] [2021-11-09 08:58:00,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:58:00,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892244988] [2021-11-09 08:58:00,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892244988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:00,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:58:00,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-11-09 08:58:00,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396288334] [2021-11-09 08:58:00,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 08:58:00,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:00,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 08:58:00,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 08:58:00,337 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 41 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:01,350 INFO L93 Difference]: Finished difference Result 1906 states and 2254 transitions. [2021-11-09 08:58:01,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 08:58:01,351 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 41 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-09 08:58:01,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:01,360 INFO L225 Difference]: With dead ends: 1906 [2021-11-09 08:58:01,360 INFO L226 Difference]: Without dead ends: 1844 [2021-11-09 08:58:01,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 08:58:01,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-09 08:58:01,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 180. [2021-11-09 08:58:01,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0837988826815643) internal successors, (194), 179 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2021-11-09 08:58:01,397 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 158 [2021-11-09 08:58:01,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:01,397 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2021-11-09 08:58:01,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 41 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:01,398 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2021-11-09 08:58:01,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-09 08:58:01,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:01,400 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 39, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:01,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-09 08:58:01,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 08:58:01,624 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:01,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:01,624 INFO L85 PathProgramCache]: Analyzing trace with hash -376448715, now seen corresponding path program 20 times [2021-11-09 08:58:01,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:01,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397089228] [2021-11-09 08:58:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:01,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:01,650 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:58:01,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928891772] [2021-11-09 08:58:01,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:58:01,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:01,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:01,652 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:01,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 08:58:02,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:58:02,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:02,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 08:58:02,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-09 08:58:04,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:04,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397089228] [2021-11-09 08:58:04,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:58:04,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928891772] [2021-11-09 08:58:04,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928891772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:04,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:58:04,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-11-09 08:58:04,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139642776] [2021-11-09 08:58:04,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 08:58:04,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:04,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 08:58:04,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:58:04,571 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 46 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:05,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:05,753 INFO L93 Difference]: Finished difference Result 2156 states and 2549 transitions. [2021-11-09 08:58:05,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 08:58:05,754 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 46 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-11-09 08:58:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:05,761 INFO L225 Difference]: With dead ends: 2156 [2021-11-09 08:58:05,761 INFO L226 Difference]: Without dead ends: 2094 [2021-11-09 08:58:05,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:58:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-11-09 08:58:05,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 195. [2021-11-09 08:58:05,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.077319587628866) internal successors, (209), 194 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) [2021-11-09 08:58:05,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2021-11-09 08:58:05,801 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 173 [2021-11-09 08:58:05,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:05,801 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2021-11-09 08:58:05,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 46 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:05,802 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2021-11-09 08:58:05,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-09 08:58:05,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:05,804 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 44, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:05,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:06,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 08:58:06,032 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:06,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:06,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1396027153, now seen corresponding path program 21 times [2021-11-09 08:58:06,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:06,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996868224] [2021-11-09 08:58:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:06,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:06,063 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:58:06,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487324426] [2021-11-09 08:58:06,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:58:06,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:06,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:06,065 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:06,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 08:58:07,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 08:58:07,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:07,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:58:07,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3565 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 3432 trivial. 0 not checked. [2021-11-09 08:58:08,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:08,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996868224] [2021-11-09 08:58:08,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:58:08,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487324426] [2021-11-09 08:58:08,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487324426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:08,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:58:08,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-09 08:58:08,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032344892] [2021-11-09 08:58:08,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:58:08,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:09,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:58:09,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:58:09,000 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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) [2021-11-09 08:58:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:09,186 INFO L93 Difference]: Finished difference Result 207 states and 223 transitions. [2021-11-09 08:58:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:58:09,186 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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) Word has length 188 [2021-11-09 08:58:09,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:09,187 INFO L225 Difference]: With dead ends: 207 [2021-11-09 08:58:09,187 INFO L226 Difference]: Without dead ends: 205 [2021-11-09 08:58:09,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:58:09,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-09 08:58:09,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 200. [2021-11-09 08:58:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0804020100502512) internal successors, (215), 199 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:09,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 215 transitions. [2021-11-09 08:58:09,209 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 215 transitions. Word has length 188 [2021-11-09 08:58:09,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:09,210 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 215 transitions. [2021-11-09 08:58:09,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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) [2021-11-09 08:58:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 215 transitions. [2021-11-09 08:58:09,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-09 08:58:09,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:09,213 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 44, 9, 9, 9, 8, 8, 4, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:09,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-09 08:58:09,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 08:58:09,423 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:09,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:09,424 INFO L85 PathProgramCache]: Analyzing trace with hash -245241357, now seen corresponding path program 22 times [2021-11-09 08:58:09,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:09,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335238586] [2021-11-09 08:58:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:09,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:09,454 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:58:09,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775289306] [2021-11-09 08:58:09,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:58:09,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:09,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:09,456 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:09,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 08:58:10,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:58:10,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:10,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 08:58:10,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3604 backedges. 3362 proven. 70 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-09 08:58:12,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:12,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335238586] [2021-11-09 08:58:12,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:58:12,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775289306] [2021-11-09 08:58:12,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775289306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:12,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:58:12,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2021-11-09 08:58:12,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959816811] [2021-11-09 08:58:12,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 08:58:12,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:12,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 08:58:12,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1272, Invalid=1380, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 08:58:12,342 INFO L87 Difference]: Start difference. First operand 200 states and 215 transitions. Second operand has 52 states, 52 states have (on average 2.980769230769231) internal successors, (155), 52 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:15,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:15,341 INFO L93 Difference]: Finished difference Result 2302 states and 2721 transitions. [2021-11-09 08:58:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-09 08:58:15,341 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.980769230769231) internal successors, (155), 52 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-11-09 08:58:15,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:15,349 INFO L225 Difference]: With dead ends: 2302 [2021-11-09 08:58:15,349 INFO L226 Difference]: Without dead ends: 2249 [2021-11-09 08:58:15,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1859, Invalid=2047, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 08:58:15,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-11-09 08:58:15,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 203. [2021-11-09 08:58:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0841584158415842) internal successors, (219), 202 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) [2021-11-09 08:58:15,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 219 transitions. [2021-11-09 08:58:15,396 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 219 transitions. Word has length 193 [2021-11-09 08:58:15,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:15,397 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 219 transitions. [2021-11-09 08:58:15,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.980769230769231) internal successors, (155), 52 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:15,398 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 219 transitions. [2021-11-09 08:58:15,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-09 08:58:15,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:15,399 INFO L513 BasicCegarLoop]: trace histogram [49, 49, 44, 9, 9, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:15,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:15,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 08:58:15,601 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:15,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:15,602 INFO L85 PathProgramCache]: Analyzing trace with hash -452945109, now seen corresponding path program 23 times [2021-11-09 08:58:15,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:15,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636882527] [2021-11-09 08:58:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:15,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:15,631 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:58:15,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57042073] [2021-11-09 08:58:15,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:58:15,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:15,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:15,633 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:15,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 08:59:59,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2021-11-09 08:59:59,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:59,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 08:59:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3749 backedges. 0 proven. 3577 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-09 09:00:01,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:01,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636882527] [2021-11-09 09:00:01,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:00:01,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57042073] [2021-11-09 09:00:01,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57042073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:01,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:00:01,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2021-11-09 09:00:01,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246157393] [2021-11-09 09:00:01,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 09:00:01,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 09:00:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 09:00:01,368 INFO L87 Difference]: Start difference. First operand 203 states and 219 transitions. Second operand has 53 states, 53 states have (on average 2.981132075471698) internal successors, (158), 52 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:03,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:03,072 INFO L93 Difference]: Finished difference Result 2678 states and 3171 transitions. [2021-11-09 09:00:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 09:00:03,073 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.981132075471698) internal successors, (158), 52 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-11-09 09:00:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:03,081 INFO L225 Difference]: With dead ends: 2678 [2021-11-09 09:00:03,082 INFO L226 Difference]: Without dead ends: 2608 [2021-11-09 09:00:03,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 09:00:03,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-11-09 09:00:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 221. [2021-11-09 09:00:03,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0772727272727274) internal successors, (237), 220 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 237 transitions. [2021-11-09 09:00:03,131 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 237 transitions. Word has length 196 [2021-11-09 09:00:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:03,131 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 237 transitions. [2021-11-09 09:00:03,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.981132075471698) internal successors, (158), 52 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:03,132 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 237 transitions. [2021-11-09 09:00:03,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-09 09:00:03,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:03,133 INFO L513 BasicCegarLoop]: trace histogram [55, 55, 50, 9, 9, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:03,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-09 09:00:03,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:03,348 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:03,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:03,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1415424491, now seen corresponding path program 24 times [2021-11-09 09:00:03,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:03,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671811107] [2021-11-09 09:00:03,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:03,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:03,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:00:03,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104831584] [2021-11-09 09:00:03,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:00:03,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:03,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:03,395 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:03,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 09:00:05,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-09 09:00:05,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:00:05,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:00:05,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4682 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 4510 trivial. 0 not checked. [2021-11-09 09:00:06,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:06,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671811107] [2021-11-09 09:00:06,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:00:06,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104831584] [2021-11-09 09:00:06,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104831584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:06,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:00:06,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-09 09:00:06,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268142042] [2021-11-09 09:00:06,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:00:06,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:06,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:00:06,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:00:06,565 INFO L87 Difference]: Start difference. First operand 221 states and 237 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:06,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:06,787 INFO L93 Difference]: Finished difference Result 233 states and 251 transitions. [2021-11-09 09:00:06,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:00:06,787 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-11-09 09:00:06,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:06,788 INFO L225 Difference]: With dead ends: 233 [2021-11-09 09:00:06,788 INFO L226 Difference]: Without dead ends: 231 [2021-11-09 09:00:06,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:00:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-09 09:00:06,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 226. [2021-11-09 09:00:06,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.08) internal successors, (243), 225 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 243 transitions. [2021-11-09 09:00:06,827 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 243 transitions. Word has length 214 [2021-11-09 09:00:06,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:06,828 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 243 transitions. [2021-11-09 09:00:06,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 243 transitions. [2021-11-09 09:00:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-09 09:00:06,829 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:06,830 INFO L513 BasicCegarLoop]: trace histogram [55, 55, 50, 10, 10, 10, 9, 9, 5, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:06,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 09:00:07,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-09 09:00:07,042 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:07,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:07,043 INFO L85 PathProgramCache]: Analyzing trace with hash -433402249, now seen corresponding path program 25 times [2021-11-09 09:00:07,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:07,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136384332] [2021-11-09 09:00:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:07,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:07,108 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:00:07,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454970025] [2021-11-09 09:00:07,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:00:07,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:07,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:07,140 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:07,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 09:00:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:00:08,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-09 09:00:08,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4726 backedges. 0 proven. 4510 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-09 09:00:11,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:11,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136384332] [2021-11-09 09:00:11,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:00:11,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454970025] [2021-11-09 09:00:11,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454970025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:11,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:00:11,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2021-11-09 09:00:11,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118185473] [2021-11-09 09:00:11,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-09 09:00:11,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:11,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-09 09:00:11,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 09:00:11,011 INFO L87 Difference]: Start difference. First operand 226 states and 243 transitions. Second operand has 59 states, 59 states have (on average 2.983050847457627) internal successors, (176), 58 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:12,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:12,948 INFO L93 Difference]: Finished difference Result 3249 states and 3850 transitions. [2021-11-09 09:00:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-09 09:00:12,949 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.983050847457627) internal successors, (176), 58 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2021-11-09 09:00:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:12,960 INFO L225 Difference]: With dead ends: 3249 [2021-11-09 09:00:12,960 INFO L226 Difference]: Without dead ends: 3174 [2021-11-09 09:00:12,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 09:00:12,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-11-09 09:00:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 244. [2021-11-09 09:00:13,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.0740740740740742) internal successors, (261), 243 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) [2021-11-09 09:00:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 261 transitions. [2021-11-09 09:00:13,013 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 261 transitions. Word has length 219 [2021-11-09 09:00:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:13,014 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 261 transitions. [2021-11-09 09:00:13,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.983050847457627) internal successors, (176), 58 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:13,014 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 261 transitions. [2021-11-09 09:00:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-09 09:00:13,015 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:13,015 INFO L513 BasicCegarLoop]: trace histogram [61, 61, 56, 10, 10, 10, 9, 9, 5, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:13,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-09 09:00:13,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:13,215 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:13,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:13,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1792464969, now seen corresponding path program 26 times [2021-11-09 09:00:13,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:13,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550018418] [2021-11-09 09:00:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:13,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:13,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:00:13,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039726878] [2021-11-09 09:00:13,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:00:13,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:13,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:13,253 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:13,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 09:00:14,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:00:14,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:00:14,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-09 09:00:14,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5767 backedges. 0 proven. 5551 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-09 09:00:17,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:17,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550018418] [2021-11-09 09:00:17,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:00:17,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039726878] [2021-11-09 09:00:17,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039726878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:17,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:00:17,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2021-11-09 09:00:17,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737050067] [2021-11-09 09:00:17,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-09 09:00:17,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:17,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-09 09:00:17,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 09:00:17,770 INFO L87 Difference]: Start difference. First operand 244 states and 261 transitions. Second operand has 65 states, 65 states have (on average 2.9846153846153847) internal successors, (194), 64 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:20,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:20,684 INFO L93 Difference]: Finished difference Result 3609 states and 4276 transitions. [2021-11-09 09:00:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-09 09:00:20,686 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.9846153846153847) internal successors, (194), 64 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2021-11-09 09:00:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:20,701 INFO L225 Difference]: With dead ends: 3609 [2021-11-09 09:00:20,701 INFO L226 Difference]: Without dead ends: 3534 [2021-11-09 09:00:20,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 09:00:20,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3534 states. [2021-11-09 09:00:20,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3534 to 262. [2021-11-09 09:00:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0689655172413792) internal successors, (279), 261 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) [2021-11-09 09:00:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 279 transitions. [2021-11-09 09:00:20,782 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 279 transitions. Word has length 237 [2021-11-09 09:00:20,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:20,783 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 279 transitions. [2021-11-09 09:00:20,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.9846153846153847) internal successors, (194), 64 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:20,783 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 279 transitions. [2021-11-09 09:00:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-09 09:00:20,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:20,785 INFO L513 BasicCegarLoop]: trace histogram [67, 67, 62, 10, 10, 10, 9, 9, 5, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:20,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-09 09:00:21,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:21,012 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:21,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:21,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1731965175, now seen corresponding path program 27 times [2021-11-09 09:00:21,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:21,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906450208] [2021-11-09 09:00:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:21,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:21,061 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:00:21,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377976190] [2021-11-09 09:00:21,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:00:21,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:21,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:21,063 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:21,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 09:00:23,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 09:00:23,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:00:23,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 09:00:23,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6700 trivial. 0 not checked. [2021-11-09 09:00:24,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:24,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906450208] [2021-11-09 09:00:24,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:00:24,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377976190] [2021-11-09 09:00:24,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377976190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:24,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:00:24,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-09 09:00:24,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190209071] [2021-11-09 09:00:24,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:00:24,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:24,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:00:24,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:00:24,641 INFO L87 Difference]: Start difference. First operand 262 states and 279 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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) [2021-11-09 09:00:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:24,901 INFO L93 Difference]: Finished difference Result 274 states and 293 transitions. [2021-11-09 09:00:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:00:24,901 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2021-11-09 09:00:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:24,903 INFO L225 Difference]: With dead ends: 274 [2021-11-09 09:00:24,903 INFO L226 Difference]: Without dead ends: 272 [2021-11-09 09:00:24,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:00:24,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-09 09:00:24,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 267. [2021-11-09 09:00:24,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0714285714285714) internal successors, (285), 266 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:24,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 285 transitions. [2021-11-09 09:00:24,935 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 285 transitions. Word has length 255 [2021-11-09 09:00:24,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:24,936 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 285 transitions. [2021-11-09 09:00:24,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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) [2021-11-09 09:00:24,936 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 285 transitions. [2021-11-09 09:00:24,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-09 09:00:24,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:24,937 INFO L513 BasicCegarLoop]: trace histogram [67, 67, 62, 11, 11, 11, 10, 10, 5, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:24,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 09:00:25,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 09:00:25,137 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:25,138 INFO L85 PathProgramCache]: Analyzing trace with hash -193769749, now seen corresponding path program 28 times [2021-11-09 09:00:25,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:25,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184628163] [2021-11-09 09:00:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:25,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:25,173 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:00:25,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933753920] [2021-11-09 09:00:25,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:00:25,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:25,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:25,174 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:25,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 09:00:27,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:00:27,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:00:27,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-09 09:00:27,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6965 backedges. 6598 proven. 102 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-09 09:00:30,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:30,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184628163] [2021-11-09 09:00:30,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:00:30,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933753920] [2021-11-09 09:00:30,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933753920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:30,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:00:30,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2021-11-09 09:00:30,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939118553] [2021-11-09 09:00:30,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-09 09:00:30,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:30,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-09 09:00:30,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2408, Invalid=2562, Unknown=0, NotChecked=0, Total=4970 [2021-11-09 09:00:30,022 INFO L87 Difference]: Start difference. First operand 267 states and 285 transitions. Second operand has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 71 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:34,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:34,592 INFO L93 Difference]: Finished difference Result 3835 states and 4544 transitions. [2021-11-09 09:00:34,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-09 09:00:34,592 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 71 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2021-11-09 09:00:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:34,608 INFO L225 Difference]: With dead ends: 3835 [2021-11-09 09:00:34,608 INFO L226 Difference]: Without dead ends: 3772 [2021-11-09 09:00:34,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3574, Invalid=3908, Unknown=0, NotChecked=0, Total=7482 [2021-11-09 09:00:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-11-09 09:00:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 270. [2021-11-09 09:00:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.0743494423791822) internal successors, (289), 269 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) [2021-11-09 09:00:34,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 289 transitions. [2021-11-09 09:00:34,671 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 289 transitions. Word has length 260 [2021-11-09 09:00:34,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:34,672 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 289 transitions. [2021-11-09 09:00:34,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 71 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:34,672 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 289 transitions. [2021-11-09 09:00:34,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-09 09:00:34,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:34,674 INFO L513 BasicCegarLoop]: trace histogram [68, 68, 62, 11, 11, 11, 10, 10, 6, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:34,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-09 09:00:34,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 09:00:34,880 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:34,880 INFO L85 PathProgramCache]: Analyzing trace with hash -807053261, now seen corresponding path program 29 times [2021-11-09 09:00:34,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:34,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820713055] [2021-11-09 09:00:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:34,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:34,917 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:00:34,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433428440] [2021-11-09 09:00:34,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:00:34,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:34,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:34,919 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:34,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 09:04:17,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 69 check-sat command(s) [2021-11-09 09:04:17,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:04:17,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-09 09:04:17,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:04:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7167 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-09 09:04:20,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:04:20,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820713055] [2021-11-09 09:04:20,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:04:20,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433428440] [2021-11-09 09:04:20,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433428440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:04:20,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:04:20,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2021-11-09 09:04:20,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75285231] [2021-11-09 09:04:20,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-09 09:04:20,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:04:20,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-09 09:04:20,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 09:04:20,645 INFO L87 Difference]: Start difference. First operand 270 states and 289 transitions. Second operand has 72 states, 72 states have (on average 2.986111111111111) internal successors, (215), 71 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:24,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:04:24,193 INFO L93 Difference]: Finished difference Result 4336 states and 5143 transitions. [2021-11-09 09:04:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-09 09:04:24,196 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.986111111111111) internal successors, (215), 71 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-11-09 09:04:24,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:04:24,208 INFO L225 Difference]: With dead ends: 4336 [2021-11-09 09:04:24,208 INFO L226 Difference]: Without dead ends: 4253 [2021-11-09 09:04:24,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 09:04:24,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4253 states. [2021-11-09 09:04:24,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4253 to 291. [2021-11-09 09:04:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.0689655172413792) internal successors, (310), 290 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:24,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 310 transitions. [2021-11-09 09:04:24,274 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 310 transitions. Word has length 263 [2021-11-09 09:04:24,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:04:24,274 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 310 transitions. [2021-11-09 09:04:24,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.986111111111111) internal successors, (215), 71 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:24,275 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 310 transitions. [2021-11-09 09:04:24,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-09 09:04:24,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:04:24,276 INFO L513 BasicCegarLoop]: trace histogram [75, 75, 69, 11, 11, 11, 10, 10, 6, 1, 1, 1, 1, 1, 1] [2021-11-09 09:04:24,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 09:04:24,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 09:04:24,477 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:04:24,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:04:24,477 INFO L85 PathProgramCache]: Analyzing trace with hash -13015635, now seen corresponding path program 30 times [2021-11-09 09:04:24,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:04:24,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680365624] [2021-11-09 09:04:24,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:04:24,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:04:24,522 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:04:24,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771814942] [2021-11-09 09:04:24,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:04:24,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:24,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:04:24,524 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:04:24,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 09:04:29,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-09 09:04:29,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:04:29,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:04:29,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:04:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8665 backedges. 1373 proven. 57 refuted. 0 times theorem prover too weak. 7235 trivial. 0 not checked. [2021-11-09 09:04:30,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:04:30,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680365624] [2021-11-09 09:04:30,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:04:30,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771814942] [2021-11-09 09:04:30,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771814942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:04:30,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:04:30,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 09:04:30,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486773890] [2021-11-09 09:04:30,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:04:30,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:04:30,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:04:30,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:04:30,233 INFO L87 Difference]: Start difference. First operand 291 states and 310 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-11-09 09:04:30,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:04:30,541 INFO L93 Difference]: Finished difference Result 563 states and 633 transitions. [2021-11-09 09:04:30,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:04:30,543 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) Word has length 284 [2021-11-09 09:04:30,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:04:30,545 INFO L225 Difference]: With dead ends: 563 [2021-11-09 09:04:30,545 INFO L226 Difference]: Without dead ends: 500 [2021-11-09 09:04:30,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:04:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-09 09:04:30,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 294. [2021-11-09 09:04:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.0716723549488054) internal successors, (314), 293 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 314 transitions. [2021-11-09 09:04:30,613 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 314 transitions. Word has length 284 [2021-11-09 09:04:30,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:04:30,614 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 314 transitions. [2021-11-09 09:04:30,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-11-09 09:04:30,614 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 314 transitions. [2021-11-09 09:04:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-09 09:04:30,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:04:30,616 INFO L513 BasicCegarLoop]: trace histogram [76, 76, 69, 11, 11, 11, 10, 10, 7, 1, 1, 1, 1, 1, 1] [2021-11-09 09:04:30,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 09:04:30,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:30,830 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:04:30,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:04:30,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1850232271, now seen corresponding path program 31 times [2021-11-09 09:04:30,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:04:30,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253722191] [2021-11-09 09:04:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:04:30,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:04:30,873 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:04:30,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845650629] [2021-11-09 09:04:30,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:04:30,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:30,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:04:30,875 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:04:30,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 09:04:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:04:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-09 09:04:32,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:04:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8891 backedges. 0 proven. 8626 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-09 09:04:36,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:04:36,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253722191] [2021-11-09 09:04:36,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:04:36,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845650629] [2021-11-09 09:04:36,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845650629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:04:36,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:04:36,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2021-11-09 09:04:36,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912230930] [2021-11-09 09:04:36,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-09 09:04:36,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:04:36,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-09 09:04:36,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 09:04:36,708 INFO L87 Difference]: Start difference. First operand 294 states and 314 transitions. Second operand has 80 states, 80 states have (on average 2.9875) internal successors, (239), 79 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) [2021-11-09 09:04:41,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:04:41,058 INFO L93 Difference]: Finished difference Result 4862 states and 5768 transitions. [2021-11-09 09:04:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-09 09:04:41,059 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.9875) internal successors, (239), 79 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 287 [2021-11-09 09:04:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:04:41,067 INFO L225 Difference]: With dead ends: 4862 [2021-11-09 09:04:41,067 INFO L226 Difference]: Without dead ends: 4776 [2021-11-09 09:04:41,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 09:04:41,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4776 states. [2021-11-09 09:04:41,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4776 to 318. [2021-11-09 09:04:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.0662460567823344) internal successors, (338), 317 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 338 transitions. [2021-11-09 09:04:41,161 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 338 transitions. Word has length 287 [2021-11-09 09:04:41,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:04:41,161 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 338 transitions. [2021-11-09 09:04:41,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.9875) internal successors, (239), 79 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) [2021-11-09 09:04:41,162 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 338 transitions. [2021-11-09 09:04:41,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-09 09:04:41,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:04:41,165 INFO L513 BasicCegarLoop]: trace histogram [84, 84, 77, 11, 11, 11, 10, 10, 7, 1, 1, 1, 1, 1, 1] [2021-11-09 09:04:41,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 09:04:41,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:41,367 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:04:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:04:41,368 INFO L85 PathProgramCache]: Analyzing trace with hash 575801649, now seen corresponding path program 32 times [2021-11-09 09:04:41,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:04:41,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407547413] [2021-11-09 09:04:41,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:04:41,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:04:41,420 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:04:41,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300489141] [2021-11-09 09:04:41,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:04:41,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:41,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:04:41,422 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:04:41,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 09:04:43,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:04:43,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:04:43,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-09 09:04:43,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:04:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10807 backedges. 0 proven. 10542 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-09 09:04:47,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:04:47,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407547413] [2021-11-09 09:04:47,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:04:47,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300489141] [2021-11-09 09:04:47,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300489141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:04:47,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:04:47,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2021-11-09 09:04:47,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54403523] [2021-11-09 09:04:47,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-09 09:04:47,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:04:47,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-09 09:04:47,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 09:04:47,946 INFO L87 Difference]: Start difference. First operand 318 states and 338 transitions. Second operand has 88 states, 88 states have (on average 2.9886363636363638) internal successors, (263), 87 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:53,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:04:53,468 INFO L93 Difference]: Finished difference Result 5382 states and 6384 transitions. [2021-11-09 09:04:53,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-09 09:04:53,470 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.9886363636363638) internal successors, (263), 87 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2021-11-09 09:04:53,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:04:53,475 INFO L225 Difference]: With dead ends: 5382 [2021-11-09 09:04:53,475 INFO L226 Difference]: Without dead ends: 5296 [2021-11-09 09:04:53,477 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 09:04:53,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5296 states. [2021-11-09 09:04:53,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 342. [2021-11-09 09:04:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.06158357771261) internal successors, (362), 341 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 362 transitions. [2021-11-09 09:04:53,588 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 362 transitions. Word has length 311 [2021-11-09 09:04:53,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:04:53,589 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 362 transitions. [2021-11-09 09:04:53,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.9886363636363638) internal successors, (263), 87 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:53,589 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 362 transitions. [2021-11-09 09:04:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-11-09 09:04:53,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:04:53,592 INFO L513 BasicCegarLoop]: trace histogram [92, 92, 85, 11, 11, 11, 10, 10, 7, 1, 1, 1, 1, 1, 1] [2021-11-09 09:04:53,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 09:04:53,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 09:04:53,808 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:04:53,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:04:53,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1863802929, now seen corresponding path program 33 times [2021-11-09 09:04:53,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:04:53,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501785703] [2021-11-09 09:04:53,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:04:53,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:04:53,879 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:04:53,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939285351] [2021-11-09 09:04:53,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:04:53,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:53,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:04:53,881 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:04:53,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 09:04:56,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-09 09:04:56,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:04:56,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:04:56,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:04:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12915 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 12650 trivial. 0 not checked. [2021-11-09 09:04:58,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:04:58,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501785703] [2021-11-09 09:04:58,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:04:58,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939285351] [2021-11-09 09:04:58,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939285351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:04:58,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:04:58,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 09:04:58,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114591765] [2021-11-09 09:04:58,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:04:58,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:04:58,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:04:58,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:04:58,855 INFO L87 Difference]: Start difference. First operand 342 states and 362 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:59,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:04:59,234 INFO L93 Difference]: Finished difference Result 354 states and 376 transitions. [2021-11-09 09:04:59,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:04:59,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 335 [2021-11-09 09:04:59,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:04:59,245 INFO L225 Difference]: With dead ends: 354 [2021-11-09 09:04:59,245 INFO L226 Difference]: Without dead ends: 352 [2021-11-09 09:04:59,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:04:59,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-09 09:04:59,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 347. [2021-11-09 09:04:59,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.0635838150289016) internal successors, (368), 346 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 368 transitions. [2021-11-09 09:04:59,335 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 368 transitions. Word has length 335 [2021-11-09 09:04:59,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:04:59,336 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 368 transitions. [2021-11-09 09:04:59,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:59,336 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 368 transitions. [2021-11-09 09:04:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-11-09 09:04:59,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:04:59,338 INFO L513 BasicCegarLoop]: trace histogram [92, 92, 85, 12, 12, 12, 11, 11, 7, 1, 1, 1, 1, 1, 1] [2021-11-09 09:04:59,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 09:04:59,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:04:59,556 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:04:59,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:04:59,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1601825807, now seen corresponding path program 34 times [2021-11-09 09:04:59,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:04:59,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362119963] [2021-11-09 09:04:59,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:04:59,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:04:59,615 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:04:59,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964393327] [2021-11-09 09:04:59,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:04:59,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:59,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:04:59,616 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:04:59,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 09:05:02,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:05:02,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:05:02,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-09 09:05:02,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:05:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12969 backedges. 12488 proven. 162 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-11-09 09:05:07,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:05:07,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362119963] [2021-11-09 09:05:07,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:05:07,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964393327] [2021-11-09 09:05:07,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964393327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:05:07,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:05:07,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2021-11-09 09:05:07,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605432844] [2021-11-09 09:05:07,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-09 09:05:07,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:05:07,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-09 09:05:07,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4447, Invalid=4673, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 09:05:07,352 INFO L87 Difference]: Start difference. First operand 347 states and 368 transitions. Second operand has 96 states, 96 states have (on average 2.9895833333333335) internal successors, (287), 96 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:05:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:05:18,822 INFO L93 Difference]: Finished difference Result 5742 states and 6814 transitions. [2021-11-09 09:05:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-11-09 09:05:18,823 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.9895833333333335) internal successors, (287), 96 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 340 [2021-11-09 09:05:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:05:18,836 INFO L225 Difference]: With dead ends: 5742 [2021-11-09 09:05:18,836 INFO L226 Difference]: Without dead ends: 5674 [2021-11-09 09:05:18,840 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=7329, Invalid=8171, Unknown=0, NotChecked=0, Total=15500 [2021-11-09 09:05:18,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2021-11-09 09:05:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 350. [2021-11-09 09:05:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.0659025787965617) internal successors, (372), 349 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:05:19,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 372 transitions. [2021-11-09 09:05:19,018 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 372 transitions. Word has length 340 [2021-11-09 09:05:19,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:05:19,019 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 372 transitions. [2021-11-09 09:05:19,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.9895833333333335) internal successors, (287), 96 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:05:19,019 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 372 transitions. [2021-11-09 09:05:19,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-11-09 09:05:19,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:05:19,022 INFO L513 BasicCegarLoop]: trace histogram [93, 93, 85, 12, 12, 12, 11, 11, 8, 1, 1, 1, 1, 1, 1] [2021-11-09 09:05:19,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 09:05:19,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:05:19,263 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:05:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:05:19,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1714014091, now seen corresponding path program 35 times [2021-11-09 09:05:19,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:05:19,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521785456] [2021-11-09 09:05:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:05:19,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:05:19,337 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:05:19,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755590272] [2021-11-09 09:05:19,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:05:19,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:05:19,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:05:19,342 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:05:19,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8727e76-a62e-46bb-ba23-f7b607b9fc3b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process