./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD --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 cb384ff5c9201b9f90543357d3375f0a0ac9cc5fac01729f538d89799a1d7226 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 22:51:43,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:51:43,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:51:43,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:51:43,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:51:43,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:51:43,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:51:43,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:51:43,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:51:43,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:51:43,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:51:43,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:51:43,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:51:43,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:51:43,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:51:43,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:51:43,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:51:43,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:51:43,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:51:43,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:51:43,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:51:43,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:51:43,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:51:43,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:51:43,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:51:43,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:51:43,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:51:43,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:51:43,659 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:51:43,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:51:43,660 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:51:43,661 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:51:43,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:51:43,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:51:43,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:51:43,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:51:43,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:51:43,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:51:43,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:51:43,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:51:43,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:51:43,670 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 22:51:43,715 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:51:43,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:51:43,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:51:43,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:51:43,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:51:43,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:51:43,726 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:51:43,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:51:43,726 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:51:43,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:51:43,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:51:43,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:51:43,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 22:51:43,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:51:43,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 22:51:43,729 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:51:43,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 22:51:43,730 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:51:43,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 22:51:43,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:51:43,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:51:43,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:51:43,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:51:43,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:51:43,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:51:43,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 22:51:43,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 22:51:43,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 22:51:43,733 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 22:51:43,734 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 22:51:43,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 22:51:43,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:51:43,735 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_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb384ff5c9201b9f90543357d3375f0a0ac9cc5fac01729f538d89799a1d7226 [2021-10-28 22:51:44,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:51:44,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:51:44,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:51:44,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:51:44,130 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:51:44,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c [2021-10-28 22:51:44,242 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/data/942160b9e/3928858de911401c89c04f65ef4e80d5/FLAG2ca6ca586 [2021-10-28 22:51:44,710 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:51:44,710 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c [2021-10-28 22:51:44,727 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/data/942160b9e/3928858de911401c89c04f65ef4e80d5/FLAG2ca6ca586 [2021-10-28 22:51:45,106 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/data/942160b9e/3928858de911401c89c04f65ef4e80d5 [2021-10-28 22:51:45,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:51:45,110 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 22:51:45,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:51:45,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:51:45,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:51:45,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:51:45" (1/1) ... [2021-10-28 22:51:45,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d4b14ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:45, skipping insertion in model container [2021-10-28 22:51:45,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:51:45" (1/1) ... [2021-10-28 22:51:45,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:51:45,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:51:45,321 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_449a33b3-57e5-40ce-832c-32a71896b348/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c[597,610] [2021-10-28 22:51:45,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:51:45,344 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:51:45,356 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_449a33b3-57e5-40ce-832c-32a71896b348/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c[597,610] [2021-10-28 22:51:45,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:51:45,377 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:51:45,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:45 WrapperNode [2021-10-28 22:51:45,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:51:45,379 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 22:51:45,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 22:51:45,379 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 22:51:45,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:45" (1/1) ... [2021-10-28 22:51:45,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:45" (1/1) ... [2021-10-28 22:51:45,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 22:51:45,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:51:45,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:51:45,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:51:45,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:45" (1/1) ... [2021-10-28 22:51:45,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:45" (1/1) ... [2021-10-28 22:51:45,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:45" (1/1) ... [2021-10-28 22:51:45,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:45" (1/1) ... [2021-10-28 22:51:45,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:45" (1/1) ... [2021-10-28 22:51:45,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:45" (1/1) ... [2021-10-28 22:51:45,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:45" (1/1) ... [2021-10-28 22:51:45,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:51:45,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:51:45,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:51:45,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:51:45,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:45" (1/1) ... [2021-10-28 22:51:45,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:51:45,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:45,485 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:51:45,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:51:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 22:51:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:51:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:51:45,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:51:45,707 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:51:45,707 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-28 22:51:45,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:51:45 BoogieIcfgContainer [2021-10-28 22:51:45,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:51:45,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:51:45,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:51:45,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:51:45,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:51:45" (1/3) ... [2021-10-28 22:51:45,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7280c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:51:45, skipping insertion in model container [2021-10-28 22:51:45,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:45" (2/3) ... [2021-10-28 22:51:45,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7280c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:51:45, skipping insertion in model container [2021-10-28 22:51:45,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:51:45" (3/3) ... [2021-10-28 22:51:45,717 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound20.c [2021-10-28 22:51:45,722 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:51:45,722 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-28 22:51:45,767 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:51:45,774 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 [2021-10-28 22:51:45,775 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-28 22:51:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 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) [2021-10-28 22:51:45,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 22:51:45,794 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:45,795 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:45,795 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:51:45,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:45,801 INFO L85 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2021-10-28 22:51:45,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:45,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328742602] [2021-10-28 22:51:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:45,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:45,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:45,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328742602] [2021-10-28 22:51:45,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328742602] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:45,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:45,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 22:51:45,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145817677] [2021-10-28 22:51:45,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 22:51:45,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:45,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 22:51:45,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 22:51:45,976 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 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) 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) [2021-10-28 22:51:45,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:45,992 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-10-28 22:51:45,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 22:51:45,994 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 [2021-10-28 22:51:45,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:46,000 INFO L225 Difference]: With dead ends: 39 [2021-10-28 22:51:46,001 INFO L226 Difference]: Without dead ends: 17 [2021-10-28 22:51:46,003 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 [2021-10-28 22:51:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-28 22:51:46,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-28 22:51:46,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2) internal successors, (18), 16 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) [2021-10-28 22:51:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-28 22:51:46,031 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-10-28 22:51:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:46,031 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-28 22:51:46,032 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) [2021-10-28 22:51:46,032 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-28 22:51:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 22:51:46,032 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:46,033 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:46,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 22:51:46,033 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:51:46,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:46,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2021-10-28 22:51:46,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:46,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124748538] [2021-10-28 22:51:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:46,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:46,060 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:51:46,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304485933] [2021-10-28 22:51:46,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:46,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:46,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:46,067 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:46,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 22:51:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:46,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 22:51:46,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:46,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:46,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124748538] [2021-10-28 22:51:46,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:51:46,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304485933] [2021-10-28 22:51:46,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304485933] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:46,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:46,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:51:46,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747598609] [2021-10-28 22:51:46,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:51:46,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:46,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:51:46,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:51:46,324 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-10-28 22:51:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:46,376 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-10-28 22:51:46,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:51:46,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 [2021-10-28 22:51:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:46,378 INFO L225 Difference]: With dead ends: 29 [2021-10-28 22:51:46,378 INFO L226 Difference]: Without dead ends: 23 [2021-10-28 22:51:46,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:51:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-28 22:51:46,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-10-28 22:51:46,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 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) [2021-10-28 22:51:46,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-28 22:51:46,383 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2021-10-28 22:51:46,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:46,384 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-28 22:51:46,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-10-28 22:51:46,384 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-28 22:51:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 22:51:46,385 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:46,385 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:46,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:46,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:46,612 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:51:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:46,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2039286562, now seen corresponding path program 1 times [2021-10-28 22:51:46,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:46,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492624435] [2021-10-28 22:51:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:46,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:46,644 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:51:46,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800083239] [2021-10-28 22:51:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:46,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:46,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:46,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:46,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 22:51:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:46,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 22:51:46,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:46,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:46,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492624435] [2021-10-28 22:51:46,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:51:46,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800083239] [2021-10-28 22:51:46,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800083239] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:46,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:51:46,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 22:51:46,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140646269] [2021-10-28 22:51:46,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:51:46,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:46,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:51:46,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:51:46,946 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:47,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:47,045 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-10-28 22:51:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:51:47,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-28 22:51:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:47,047 INFO L225 Difference]: With dead ends: 34 [2021-10-28 22:51:47,047 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 22:51:47,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:51:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 22:51:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-10-28 22:51:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-10-28 22:51:47,054 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2021-10-28 22:51:47,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:47,054 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-10-28 22:51:47,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:47,055 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-10-28 22:51:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 22:51:47,056 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:47,056 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:47,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:47,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:47,283 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:51:47,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:47,285 INFO L85 PathProgramCache]: Analyzing trace with hash -2037439520, now seen corresponding path program 1 times [2021-10-28 22:51:47,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:47,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118842774] [2021-10-28 22:51:47,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:47,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:47,325 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:51:47,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112202088] [2021-10-28 22:51:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:47,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:47,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:47,348 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:47,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 22:51:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:47,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 22:51:47,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:47,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:47,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118842774] [2021-10-28 22:51:47,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:51:47,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112202088] [2021-10-28 22:51:47,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112202088] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:47,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:51:47,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 22:51:47,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259018048] [2021-10-28 22:51:47,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:51:47,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:47,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:51:47,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:51:47,731 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:47,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:47,872 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-10-28 22:51:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:51:47,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-28 22:51:47,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:47,875 INFO L225 Difference]: With dead ends: 38 [2021-10-28 22:51:47,875 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 22:51:47,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:51:47,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 22:51:47,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2021-10-28 22:51:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-28 22:51:47,888 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-10-28 22:51:47,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:47,889 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-28 22:51:47,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-28 22:51:47,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 22:51:47,892 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:47,892 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:47,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:48,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:48,109 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:51:48,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:48,110 INFO L85 PathProgramCache]: Analyzing trace with hash -878006574, now seen corresponding path program 1 times [2021-10-28 22:51:48,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:48,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575693537] [2021-10-28 22:51:48,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:48,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:48,137 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:51:48,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430790895] [2021-10-28 22:51:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:48,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:48,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:48,144 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:48,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 22:51:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:48,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 22:51:48,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:48,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:48,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575693537] [2021-10-28 22:51:48,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:51:48,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430790895] [2021-10-28 22:51:48,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430790895] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:48,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:51:48,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 22:51:48,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451972962] [2021-10-28 22:51:48,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:51:48,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:48,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:51:48,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:51:48,673 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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) [2021-10-28 22:51:48,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:48,892 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-10-28 22:51:48,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 22:51:48,892 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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 17 [2021-10-28 22:51:48,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:48,893 INFO L225 Difference]: With dead ends: 37 [2021-10-28 22:51:48,893 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 22:51:48,894 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:51:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 22:51:48,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-10-28 22:51:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:48,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-10-28 22:51:48,898 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2021-10-28 22:51:48,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:48,898 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-10-28 22:51:48,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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) [2021-10-28 22:51:48,898 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-10-28 22:51:48,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 22:51:48,899 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:48,899 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:48,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:49,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:49,109 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:51:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:49,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1508067884, now seen corresponding path program 2 times [2021-10-28 22:51:49,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:49,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794144343] [2021-10-28 22:51:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:49,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:49,123 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:51:49,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201246819] [2021-10-28 22:51:49,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:51:49,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:49,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:49,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:49,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 22:51:49,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:51:49,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:51:49,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 22:51:49,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:49,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:49,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794144343] [2021-10-28 22:51:49,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:51:49,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201246819] [2021-10-28 22:51:49,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201246819] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:49,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:51:49,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 22:51:49,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401255670] [2021-10-28 22:51:49,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 22:51:49,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:49,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 22:51:49,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:51:49,782 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:50,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:50,286 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-10-28 22:51:50,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 22:51:50,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-28 22:51:50,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:50,287 INFO L225 Difference]: With dead ends: 43 [2021-10-28 22:51:50,287 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 22:51:50,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-10-28 22:51:50,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 22:51:50,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-28 22:51:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 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) [2021-10-28 22:51:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-10-28 22:51:50,293 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2021-10-28 22:51:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:50,293 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-10-28 22:51:50,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:50,293 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-10-28 22:51:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 22:51:50,294 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:50,294 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:50,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:50,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:50,507 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:51:50,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:50,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1506220842, now seen corresponding path program 1 times [2021-10-28 22:51:50,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:50,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981398134] [2021-10-28 22:51:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:50,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:50,520 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:51:50,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834368332] [2021-10-28 22:51:50,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:50,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:50,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:50,522 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:50,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 22:51:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:50,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 22:51:50,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:51,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:51,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981398134] [2021-10-28 22:51:51,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:51:51,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834368332] [2021-10-28 22:51:51,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834368332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:51,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:51:51,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 22:51:51,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827572029] [2021-10-28 22:51:51,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:51:51,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:51,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:51:51,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:51:51,048 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:51,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:51,269 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-10-28 22:51:51,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:51:51,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-28 22:51:51,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:51,270 INFO L225 Difference]: With dead ends: 48 [2021-10-28 22:51:51,270 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 22:51:51,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-28 22:51:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 22:51:51,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-10-28 22:51:51,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 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) [2021-10-28 22:51:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-10-28 22:51:51,276 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19 [2021-10-28 22:51:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:51,277 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-10-28 22:51:51,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:51,277 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-10-28 22:51:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 22:51:51,278 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:51,278 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:51,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:51,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:51,503 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:51:51,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:51,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1901094894, now seen corresponding path program 2 times [2021-10-28 22:51:51,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:51,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791725152] [2021-10-28 22:51:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:51,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:51,514 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:51:51,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917392921] [2021-10-28 22:51:51,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:51:51,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:51,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:51,532 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:51,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 22:51:51,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:51:51,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:51:51,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 22:51:51,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:51,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:51,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791725152] [2021-10-28 22:51:51,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:51:51,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917392921] [2021-10-28 22:51:51,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917392921] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:51,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:51:51,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 22:51:51,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714631746] [2021-10-28 22:51:51,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 22:51:51,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:51,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 22:51:51,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:51:51,959 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:52,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:52,248 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-10-28 22:51:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:51:52,248 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-28 22:51:52,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:52,249 INFO L225 Difference]: With dead ends: 53 [2021-10-28 22:51:52,249 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 22:51:52,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:51:52,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 22:51:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-10-28 22:51:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 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) [2021-10-28 22:51:52,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-10-28 22:51:52,257 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 19 [2021-10-28 22:51:52,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:52,257 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-10-28 22:51:52,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-10-28 22:51:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 22:51:52,259 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:52,259 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:52,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-28 22:51:52,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 22:51:52,475 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:51:52,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:52,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1899247852, now seen corresponding path program 2 times [2021-10-28 22:51:52,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:52,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822194459] [2021-10-28 22:51:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:52,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:52,488 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:51:52,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972704136] [2021-10-28 22:51:52,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:51:52,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:52,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:52,489 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:52,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 22:51:52,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:51:52,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:51:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 22:51:52,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:52,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:52,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822194459] [2021-10-28 22:51:52,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:51:52,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972704136] [2021-10-28 22:51:52,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972704136] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:52,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:51:52,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 22:51:52,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6577383] [2021-10-28 22:51:52,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:51:52,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:52,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:51:52,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:51:52,974 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:53,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:53,228 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-10-28 22:51:53,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 22:51:53,229 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-28 22:51:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:53,230 INFO L225 Difference]: With dead ends: 56 [2021-10-28 22:51:53,230 INFO L226 Difference]: Without dead ends: 54 [2021-10-28 22:51:53,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-28 22:51:53,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-28 22:51:53,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2021-10-28 22:51:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 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) [2021-10-28 22:51:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-10-28 22:51:53,239 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 19 [2021-10-28 22:51:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:53,243 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-10-28 22:51:53,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:53,244 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-10-28 22:51:53,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 22:51:53,248 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:53,248 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:53,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:53,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:53,462 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:51:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:53,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2074315424, now seen corresponding path program 1 times [2021-10-28 22:51:53,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:53,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322261904] [2021-10-28 22:51:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:53,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:53,476 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:51:53,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202995916] [2021-10-28 22:51:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:53,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:53,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:53,478 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:53,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 22:51:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:53,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 22:51:53,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:53,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:53,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322261904] [2021-10-28 22:51:53,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:51:53,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202995916] [2021-10-28 22:51:53,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202995916] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:53,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:51:53,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 22:51:53,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946187804] [2021-10-28 22:51:53,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:51:53,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:53,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:51:53,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:51:53,992 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:54,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:54,112 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-10-28 22:51:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:51:54,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-28 22:51:54,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:54,113 INFO L225 Difference]: With dead ends: 53 [2021-10-28 22:51:54,114 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 22:51:54,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:51:54,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 22:51:54,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-10-28 22:51:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 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) [2021-10-28 22:51:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-10-28 22:51:54,125 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 22 [2021-10-28 22:51:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:54,126 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-10-28 22:51:54,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-10-28 22:51:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 22:51:54,128 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:54,128 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:54,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:54,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 22:51:54,355 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:51:54,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:54,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1411305246, now seen corresponding path program 2 times [2021-10-28 22:51:54,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:54,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856728194] [2021-10-28 22:51:54,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:54,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:54,373 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:51:54,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331157737] [2021-10-28 22:51:54,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:51:54,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:54,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:54,375 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:54,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 22:51:54,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:51:54,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:51:54,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 22:51:54,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:55,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:55,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856728194] [2021-10-28 22:51:55,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:51:55,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331157737] [2021-10-28 22:51:55,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331157737] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:55,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:51:55,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 22:51:55,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011809902] [2021-10-28 22:51:55,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 22:51:55,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:55,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 22:51:55,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:51:55,111 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:55,418 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-10-28 22:51:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 22:51:55,419 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-28 22:51:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:55,419 INFO L225 Difference]: With dead ends: 53 [2021-10-28 22:51:55,420 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 22:51:55,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:51:55,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 22:51:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-10-28 22:51:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-10-28 22:51:55,436 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 22 [2021-10-28 22:51:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:55,437 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-10-28 22:51:55,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-10-28 22:51:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 22:51:55,438 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:55,439 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:55,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:55,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 22:51:55,643 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:51:55,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:55,644 INFO L85 PathProgramCache]: Analyzing trace with hash 777199262, now seen corresponding path program 3 times [2021-10-28 22:51:55,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:55,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386749636] [2021-10-28 22:51:55,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:55,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:55,657 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:51:55,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745448172] [2021-10-28 22:51:55,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:51:55,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:55,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:55,659 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:55,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 22:51:55,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 22:51:55,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:51:55,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 22:51:55,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 22:51:56,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:56,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386749636] [2021-10-28 22:51:56,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:51:56,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745448172] [2021-10-28 22:51:56,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745448172] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:56,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:51:56,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 22:51:56,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863375117] [2021-10-28 22:51:56,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:51:56,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:51:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:51:56,119 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:56,275 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-10-28 22:51:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:51:56,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-28 22:51:56,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:56,277 INFO L225 Difference]: With dead ends: 57 [2021-10-28 22:51:56,277 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 22:51:56,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:51:56,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 22:51:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-10-28 22:51:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 44 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) [2021-10-28 22:51:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-10-28 22:51:56,288 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2021-10-28 22:51:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:56,288 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-10-28 22:51:56,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:56,289 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-10-28 22:51:56,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 22:51:56,290 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:56,290 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:56,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:56,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 22:51:56,515 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:51:56,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:56,516 INFO L85 PathProgramCache]: Analyzing trace with hash 779046304, now seen corresponding path program 3 times [2021-10-28 22:51:56,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:56,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331762103] [2021-10-28 22:51:56,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:56,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:56,529 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:51:56,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476157559] [2021-10-28 22:51:56,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:51:56,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:56,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:56,535 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:56,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 22:51:56,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 22:51:56,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:51:56,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 22:51:56,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 22:51:57,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:57,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331762103] [2021-10-28 22:51:57,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:51:57,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476157559] [2021-10-28 22:51:57,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476157559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:57,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:51:57,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 22:51:57,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039982144] [2021-10-28 22:51:57,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:51:57,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:57,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:51:57,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:51:57,031 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:57,172 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-10-28 22:51:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:51:57,173 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-28 22:51:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:57,174 INFO L225 Difference]: With dead ends: 62 [2021-10-28 22:51:57,174 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 22:51:57,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:51:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 22:51:57,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-10-28 22:51:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-10-28 22:51:57,188 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 24 [2021-10-28 22:51:57,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:57,189 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-10-28 22:51:57,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:57,189 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-10-28 22:51:57,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 22:51:57,190 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:57,190 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:57,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:57,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 22:51:57,416 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:51:57,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:57,417 INFO L85 PathProgramCache]: Analyzing trace with hash -500817374, now seen corresponding path program 4 times [2021-10-28 22:51:57,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:57,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544643287] [2021-10-28 22:51:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:57,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:57,430 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:51:57,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244177228] [2021-10-28 22:51:57,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 22:51:57,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:57,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:57,432 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:57,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 22:51:57,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 22:51:57,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:51:57,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 22:51:57,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:58,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:58,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544643287] [2021-10-28 22:51:58,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:51:58,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244177228] [2021-10-28 22:51:58,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244177228] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:58,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:51:58,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 22:51:58,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024703329] [2021-10-28 22:51:58,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:51:58,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:58,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:51:58,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:51:58,125 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:58,423 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-10-28 22:51:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 22:51:58,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-28 22:51:58,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:58,424 INFO L225 Difference]: With dead ends: 82 [2021-10-28 22:51:58,424 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 22:51:58,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-10-28 22:51:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 22:51:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-10-28 22:51:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-10-28 22:51:58,434 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 24 [2021-10-28 22:51:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:58,434 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-10-28 22:51:58,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:51:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-10-28 22:51:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 22:51:58,435 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:58,435 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:58,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:58,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:58,651 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:51:58,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash -895691426, now seen corresponding path program 5 times [2021-10-28 22:51:58,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:58,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134385361] [2021-10-28 22:51:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:58,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:58,662 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:51:58,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331740836] [2021-10-28 22:51:58,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 22:51:58,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:58,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:58,664 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:58,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 22:51:59,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 22:51:59,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:51:59,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-28 22:51:59,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:52:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:52:06,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:52:06,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134385361] [2021-10-28 22:52:06,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:52:06,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331740836] [2021-10-28 22:52:06,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331740836] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:52:06,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:52:06,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-28 22:52:06,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991327631] [2021-10-28 22:52:06,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 22:52:06,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:52:06,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 22:52:06,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:52:06,430 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:52:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:13,118 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-10-28 22:52:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 22:52:13,119 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-28 22:52:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:13,119 INFO L225 Difference]: With dead ends: 72 [2021-10-28 22:52:13,119 INFO L226 Difference]: Without dead ends: 70 [2021-10-28 22:52:13,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-10-28 22:52:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-28 22:52:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2021-10-28 22:52:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:52:13,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-10-28 22:52:13,132 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 24 [2021-10-28 22:52:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:13,132 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-10-28 22:52:13,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:52:13,133 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-10-28 22:52:13,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 22:52:13,133 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:13,133 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:13,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 22:52:13,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 22:52:13,339 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:52:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:13,339 INFO L85 PathProgramCache]: Analyzing trace with hash -893844384, now seen corresponding path program 3 times [2021-10-28 22:52:13,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:52:13,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768890833] [2021-10-28 22:52:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:13,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:52:13,350 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:52:13,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211513413] [2021-10-28 22:52:13,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:52:13,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:52:13,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:52:13,355 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:52:13,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 22:52:13,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 22:52:13,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:52:13,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 22:52:13,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:52:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 22:52:13,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:52:13,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768890833] [2021-10-28 22:52:13,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:52:13,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211513413] [2021-10-28 22:52:13,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211513413] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:52:13,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:52:13,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 22:52:13,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625586624] [2021-10-28 22:52:13,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:52:13,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:52:13,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:52:13,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:52:13,717 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:52:13,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:13,832 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-10-28 22:52:13,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:52:13,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-28 22:52:13,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:13,835 INFO L225 Difference]: With dead ends: 59 [2021-10-28 22:52:13,835 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 22:52:13,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:52:13,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 22:52:13,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2021-10-28 22:52:13,854 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) [2021-10-28 22:52:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-28 22:52:13,855 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 24 [2021-10-28 22:52:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:13,855 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-28 22:52:13,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:52:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-28 22:52:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 22:52:13,856 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:13,856 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:13,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 22:52:14,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 22:52:14,083 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:52:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:14,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1429918446, now seen corresponding path program 2 times [2021-10-28 22:52:14,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:52:14,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127826263] [2021-10-28 22:52:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:14,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:52:14,092 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:52:14,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485854341] [2021-10-28 22:52:14,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:52:14,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:52:14,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:52:14,106 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:52:14,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 22:52:14,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:52:14,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:52:14,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 22:52:14,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:52:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:52:14,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:52:14,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127826263] [2021-10-28 22:52:14,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:52:14,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485854341] [2021-10-28 22:52:14,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485854341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:52:14,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:52:14,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 22:52:14,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336317829] [2021-10-28 22:52:14,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 22:52:14,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:52:14,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 22:52:14,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:52:14,611 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:52:14,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:14,790 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2021-10-28 22:52:14,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:52:14,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-28 22:52:14,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:14,791 INFO L225 Difference]: With dead ends: 63 [2021-10-28 22:52:14,791 INFO L226 Difference]: Without dead ends: 59 [2021-10-28 22:52:14,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:52:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-28 22:52:14,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-10-28 22:52:14,804 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) [2021-10-28 22:52:14,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-10-28 22:52:14,804 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 27 [2021-10-28 22:52:14,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:14,804 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-10-28 22:52:14,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:52:14,805 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-10-28 22:52:14,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 22:52:14,805 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:14,805 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:14,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 22:52:15,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 22:52:15,011 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:52:15,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:15,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1207377834, now seen corresponding path program 3 times [2021-10-28 22:52:15,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:52:15,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314834867] [2021-10-28 22:52:15,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:15,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:52:15,020 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:52:15,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126518746] [2021-10-28 22:52:15,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:52:15,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:52:15,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:52:15,026 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:52:15,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 22:52:15,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 22:52:15,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:52:15,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 22:52:15,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:52:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-28 22:52:17,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:52:17,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314834867] [2021-10-28 22:52:17,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:52:17,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126518746] [2021-10-28 22:52:17,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126518746] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:52:17,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:52:17,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-28 22:52:17,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480142432] [2021-10-28 22:52:17,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 22:52:17,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:52:17,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 22:52:17,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:52:17,725 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) [2021-10-28 22:52:20,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:20,720 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-10-28 22:52:20,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 22:52:20,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) Word has length 27 [2021-10-28 22:52:20,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:20,720 INFO L225 Difference]: With dead ends: 68 [2021-10-28 22:52:20,721 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 22:52:20,721 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2021-10-28 22:52:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 22:52:20,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2021-10-28 22:52:20,730 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) [2021-10-28 22:52:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-28 22:52:20,731 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2021-10-28 22:52:20,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:20,731 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-28 22:52:20,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) [2021-10-28 22:52:20,732 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-28 22:52:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 22:52:20,732 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:20,732 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:20,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-28 22:52:20,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 22:52:20,938 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:52:20,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:20,938 INFO L85 PathProgramCache]: Analyzing trace with hash 870904144, now seen corresponding path program 4 times [2021-10-28 22:52:20,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:52:20,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275446336] [2021-10-28 22:52:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:20,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:52:20,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:52:20,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261285413] [2021-10-28 22:52:20,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 22:52:20,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:52:20,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:52:20,963 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:52:20,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 22:52:21,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 22:52:21,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:52:21,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 22:52:21,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:52:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:52:21,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:52:21,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275446336] [2021-10-28 22:52:21,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:52:21,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261285413] [2021-10-28 22:52:21,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261285413] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:52:21,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:52:21,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 22:52:21,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518647324] [2021-10-28 22:52:21,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:52:21,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:52:21,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:52:21,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:52:21,900 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:52:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:22,259 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-10-28 22:52:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 22:52:22,259 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-28 22:52:22,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:22,260 INFO L225 Difference]: With dead ends: 61 [2021-10-28 22:52:22,260 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 22:52:22,260 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-10-28 22:52:22,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 22:52:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2021-10-28 22:52:22,267 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) [2021-10-28 22:52:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-28 22:52:22,268 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2021-10-28 22:52:22,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:22,268 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-28 22:52:22,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:52:22,268 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-28 22:52:22,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 22:52:22,269 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:22,269 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:22,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 22:52:22,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:52:22,471 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:52:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:22,472 INFO L85 PathProgramCache]: Analyzing trace with hash 284098130, now seen corresponding path program 3 times [2021-10-28 22:52:22,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:52:22,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20821790] [2021-10-28 22:52:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:22,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:52:22,493 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:52:22,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142977894] [2021-10-28 22:52:22,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:52:22,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:52:22,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:52:22,507 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:52:22,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 22:52:23,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 22:52:23,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:52:23,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 22:52:23,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:52:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-28 22:52:24,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:52:24,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20821790] [2021-10-28 22:52:24,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:52:24,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142977894] [2021-10-28 22:52:24,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142977894] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:52:24,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:52:24,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 22:52:24,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841230823] [2021-10-28 22:52:24,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:52:24,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:52:24,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:52:24,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:52:24,043 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:52:24,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:24,503 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-10-28 22:52:24,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 22:52:24,503 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-28 22:52:24,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:24,503 INFO L225 Difference]: With dead ends: 48 [2021-10-28 22:52:24,503 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 22:52:24,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-10-28 22:52:24,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 22:52:24,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 22:52:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:52:24,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 22:52:24,505 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-10-28 22:52:24,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:24,505 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 22:52:24,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:52:24,505 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 22:52:24,505 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 22:52:24,507 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 22:52:24,507 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 22:52:24,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 22:52:24,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:52:24,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 22:52:24,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 22:52:24,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 22:52:24,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 22:52:24,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 22:52:30,636 WARN L207 SmtUtils]: Spent 5.67 s on a formula simplification. DAG size of input: 158 DAG size of output: 37 [2021-10-28 22:52:31,355 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-10-28 22:52:31,355 INFO L860 garLoopResultBuilder]: At program point L52(lines 21 53) the Hoare annotation is: true [2021-10-28 22:52:31,356 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 16) no Hoare annotation was computed. [2021-10-28 22:52:31,356 INFO L857 garLoopResultBuilder]: For program point L15-1(lines 15 16) no Hoare annotation was computed. [2021-10-28 22:52:31,356 INFO L857 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2021-10-28 22:52:31,356 INFO L857 garLoopResultBuilder]: For program point L11-2(line 11) no Hoare annotation was computed. [2021-10-28 22:52:31,356 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 45) no Hoare annotation was computed. [2021-10-28 22:52:31,356 INFO L857 garLoopResultBuilder]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2021-10-28 22:52:31,356 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 22:52:31,357 INFO L853 garLoopResultBuilder]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (* 2 ULTIMATE.start_main_~Y~0)) (.cse2 (<= 0 ULTIMATE.start_main_~Y~0)) (.cse3 (<= ULTIMATE.start_main_~Y~0 20)) (.cse4 (<= ULTIMATE.start_main_~X~0 20))) (or (and (= ULTIMATE.start_main_~y~0 0) (= ULTIMATE.start_main_~x~0 0) .cse0 (= .cse1 (+ ULTIMATE.start_main_~X~0 ULTIMATE.start_main_~v~0)) .cse2 .cse3 (<= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~X~0) .cse4) (and (<= 0 ULTIMATE.start_main_~X~0) .cse0 (= (+ (* 2 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~Y~0)) .cse1) (+ ULTIMATE.start_main_~X~0 ULTIMATE.start_main_~v~0 (* 2 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~X~0)))) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse2 .cse3 .cse4 (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1))))) [2021-10-28 22:52:31,357 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 22:52:31,357 INFO L857 garLoopResultBuilder]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2021-10-28 22:52:31,357 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 22:52:31,357 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-10-28 22:52:31,357 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 22:52:31,358 INFO L857 garLoopResultBuilder]: For program point L14(lines 14 17) no Hoare annotation was computed. [2021-10-28 22:52:31,358 INFO L853 garLoopResultBuilder]: At program point L14-2(lines 36 37) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~X~0) (= ULTIMATE.start_assume_abort_if_not_~cond 1) (= (+ (* 2 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~Y~0)) (* 2 ULTIMATE.start_main_~Y~0)) (+ ULTIMATE.start_main_~X~0 ULTIMATE.start_main_~v~0 (* 2 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~X~0)))) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 0 ULTIMATE.start_main_~Y~0) (<= ULTIMATE.start_main_~Y~0 20) (<= ULTIMATE.start_main_~X~0 20) (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1))) [2021-10-28 22:52:31,358 INFO L857 garLoopResultBuilder]: For program point L14-3(lines 14 17) no Hoare annotation was computed. [2021-10-28 22:52:31,358 INFO L857 garLoopResultBuilder]: For program point L10(lines 10 12) no Hoare annotation was computed. [2021-10-28 22:52:31,358 INFO L857 garLoopResultBuilder]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2021-10-28 22:52:31,358 INFO L860 garLoopResultBuilder]: At program point L14-5(lines 13 19) the Hoare annotation is: true [2021-10-28 22:52:31,362 INFO L731 BasicCegarLoop]: Path program histogram: [5, 4, 3, 3, 3, 1, 1] [2021-10-28 22:52:31,363 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:52:31,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:52:31 BoogieIcfgContainer [2021-10-28 22:52:31,378 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:52:31,379 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:52:31,379 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:52:31,379 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:52:31,379 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:51:45" (3/4) ... [2021-10-28 22:52:31,382 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 22:52:31,392 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-28 22:52:31,393 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 22:52:31,393 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 22:52:31,393 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 22:52:31,431 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 22:52:31,431 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:52:31,432 INFO L168 Benchmark]: Toolchain (without parser) took 46322.61 ms. Allocated memory was 121.6 MB in the beginning and 186.6 MB in the end (delta: 65.0 MB). Free memory was 81.1 MB in the beginning and 142.0 MB in the end (delta: -60.9 MB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. [2021-10-28 22:52:31,433 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 121.6 MB. Free memory is still 97.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:52:31,433 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.48 ms. Allocated memory is still 121.6 MB. Free memory was 80.9 MB in the beginning and 94.3 MB in the end (delta: -13.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 22:52:31,434 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.03 ms. Allocated memory is still 121.6 MB. Free memory was 94.3 MB in the beginning and 92.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:52:31,434 INFO L168 Benchmark]: Boogie Preprocessor took 21.22 ms. Allocated memory is still 121.6 MB. Free memory was 92.8 MB in the beginning and 91.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:52:31,439 INFO L168 Benchmark]: RCFGBuilder took 269.85 ms. Allocated memory is still 121.6 MB. Free memory was 91.3 MB in the beginning and 81.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 22:52:31,439 INFO L168 Benchmark]: TraceAbstraction took 45667.34 ms. Allocated memory was 121.6 MB in the beginning and 186.6 MB in the end (delta: 65.0 MB). Free memory was 80.8 MB in the beginning and 145.1 MB in the end (delta: -64.3 MB). Peak memory consumption was 98.6 MB. Max. memory is 16.1 GB. [2021-10-28 22:52:31,440 INFO L168 Benchmark]: Witness Printer took 52.89 ms. Allocated memory is still 186.6 MB. Free memory was 145.1 MB in the beginning and 142.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:52:31,442 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 121.6 MB. Free memory is still 97.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 262.48 ms. Allocated memory is still 121.6 MB. Free memory was 80.9 MB in the beginning and 94.3 MB in the end (delta: -13.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.03 ms. Allocated memory is still 121.6 MB. Free memory was 94.3 MB in the beginning and 92.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.22 ms. Allocated memory is still 121.6 MB. Free memory was 92.8 MB in the beginning and 91.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 269.85 ms. Allocated memory is still 121.6 MB. Free memory was 91.3 MB in the beginning and 81.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 45667.34 ms. Allocated memory was 121.6 MB in the beginning and 186.6 MB in the end (delta: 65.0 MB). Free memory was 80.8 MB in the beginning and 145.1 MB in the end (delta: -64.3 MB). Peak memory consumption was 98.6 MB. Max. memory is 16.1 GB. * Witness Printer took 52.89 ms. Allocated memory is still 186.6 MB. Free memory was 145.1 MB in the beginning and 142.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 45.5s, OverallIterations: 20, TraceHistogramMax: 4, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 13.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 249 SDtfs, 313 SDslu, 835 SDs, 0 SdLazy, 2146 SolverSat, 201 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 476 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 14.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=15, InterpolantAutomatonStates: 196, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 136 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 22 NumberOfFragments, 116 HoareAnnotationTreeSize, 4 FomulaSimplifications, 203818 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 4 FomulaSimplificationsInter, 1627 FormulaSimplificationTreeSizeReductionInter, 6.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 15.4s InterpolantComputationTime, 411 NumberOfCodeBlocks, 370 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 391 ConstructedInterpolants, 0 QuantifiedInterpolants, 5152 SizeOfPredicates, 206 NumberOfNonLiveVariables, 1799 ConjunctsInSsa, 518 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 99/266 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (((((((y == 0 && x == 0) && cond == 1) && 2 * Y == X + v) && 0 <= Y) && Y <= 20) && x <= X) && X <= 20) || (((((((0 <= X && cond == 1) && 2 * (x * Y) + 2 * Y == X + v + 2 * (y * X)) && 1 <= cond) && 0 <= Y) && Y <= 20) && X <= 20) && x <= X + 1) - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((0 <= X && cond == 1) && 2 * (x * Y) + 2 * Y == X + v + 2 * (y * X)) && 1 == cond) && 0 <= Y) && Y <= 20) && X <= 20) && x <= X + 1 RESULT: Ultimate proved your program to be correct! [2021-10-28 22:52:31,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_449a33b3-57e5-40ce-832c-32a71896b348/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...