./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be --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 4018f196b5be3ea7c518259557cd649a90434a9cacf1ef4108caf962c0feb788 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:15:40,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:15:40,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:15:40,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:15:40,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:15:40,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:15:40,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:15:40,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:15:40,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:15:40,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:15:40,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:15:40,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:15:40,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:15:40,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:15:40,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:15:40,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:15:40,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:15:40,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:15:40,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:15:40,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:15:40,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:15:40,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:15:40,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:15:40,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:15:40,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:15:40,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:15:40,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:15:40,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:15:40,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:15:40,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:15:40,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:15:40,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:15:40,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:15:40,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:15:40,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:15:40,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:15:40,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:15:40,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:15:40,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:15:40,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:15:40,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:15:40,738 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 20:15:40,788 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:15:40,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:15:40,789 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:15:40,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:15:40,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:15:40,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:15:40,791 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:15:40,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:15:40,792 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:15:40,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:15:40,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:15:40,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:15:40,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 20:15:40,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:15:40,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 20:15:40,795 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:15:40,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:15:40,796 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:15:40,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 20:15:40,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:15:40,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:15:40,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:15:40,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:15:40,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:15:40,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:15:40,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 20:15:40,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:15:40,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:15:40,799 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 20:15:40,801 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 20:15:40,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 20:15:40,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:15:40,802 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_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018f196b5be3ea7c518259557cd649a90434a9cacf1ef4108caf962c0feb788 [2021-10-21 20:15:41,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:15:41,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:15:41,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:15:41,145 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:15:41,147 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:15:41,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound10.c [2021-10-21 20:15:41,221 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/data/d826b3d1d/5254f04c35884c518ddd0f8549dcb38f/FLAGc142a278b [2021-10-21 20:15:41,848 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:15:41,851 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound10.c [2021-10-21 20:15:41,860 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/data/d826b3d1d/5254f04c35884c518ddd0f8549dcb38f/FLAGc142a278b [2021-10-21 20:15:42,200 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/data/d826b3d1d/5254f04c35884c518ddd0f8549dcb38f [2021-10-21 20:15:42,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:15:42,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:15:42,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:15:42,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:15:42,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:15:42,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:15:42" (1/1) ... [2021-10-21 20:15:42,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10f02580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:15:42, skipping insertion in model container [2021-10-21 20:15:42,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:15:42" (1/1) ... [2021-10-21 20:15:42,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:15:42,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:15:42,407 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_fc6aecbf-e084-467e-b97b-17f9688b4598/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound10.c[597,610] [2021-10-21 20:15:42,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:15:42,436 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:15:42,451 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_fc6aecbf-e084-467e-b97b-17f9688b4598/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound10.c[597,610] [2021-10-21 20:15:42,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:15:42,477 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:15:42,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:15:42 WrapperNode [2021-10-21 20:15:42,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:15:42,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:15:42,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:15:42,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:15:42,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:15:42" (1/1) ... [2021-10-21 20:15:42,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:15:42" (1/1) ... [2021-10-21 20:15:42,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:15:42,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:15:42,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:15:42,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:15:42,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:15:42" (1/1) ... [2021-10-21 20:15:42,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:15:42" (1/1) ... [2021-10-21 20:15:42,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:15:42" (1/1) ... [2021-10-21 20:15:42,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:15:42" (1/1) ... [2021-10-21 20:15:42,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:15:42" (1/1) ... [2021-10-21 20:15:42,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:15:42" (1/1) ... [2021-10-21 20:15:42,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:15:42" (1/1) ... [2021-10-21 20:15:42,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:15:42,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:15:42,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:15:42,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:15:42,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:15:42" (1/1) ... [2021-10-21 20:15:42,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:15:42,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:42,582 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:15:42,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:15:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:15:42,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:15:42,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:15:42,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:15:42,891 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:15:42,891 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-21 20:15:42,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:15:42 BoogieIcfgContainer [2021-10-21 20:15:42,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:15:42,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:15:42,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:15:42,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:15:42,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:15:42" (1/3) ... [2021-10-21 20:15:42,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@506382fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:15:42, skipping insertion in model container [2021-10-21 20:15:42,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:15:42" (2/3) ... [2021-10-21 20:15:42,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@506382fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:15:42, skipping insertion in model container [2021-10-21 20:15:42,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:15:42" (3/3) ... [2021-10-21 20:15:42,920 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound10.c [2021-10-21 20:15:42,927 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:15:42,927 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-21 20:15:43,001 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:15:43,009 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 [2021-10-21 20:15:43,010 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-21 20:15:43,028 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) [2021-10-21 20:15:43,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 20:15:43,034 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:43,035 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:43,036 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:43,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:43,042 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2021-10-21 20:15:43,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:43,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407837919] [2021-10-21 20:15:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:43,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:43,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:43,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407837919] [2021-10-21 20:15:43,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407837919] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:15:43,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:15:43,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 20:15:43,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297843737] [2021-10-21 20:15:43,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 20:15:43,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:43,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 20:15:43,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 20:15:43,296 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) [2021-10-21 20:15:43,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:43,319 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-10-21 20:15:43,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 20:15:43,321 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 [2021-10-21 20:15:43,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:43,330 INFO L225 Difference]: With dead ends: 39 [2021-10-21 20:15:43,331 INFO L226 Difference]: Without dead ends: 17 [2021-10-21 20:15:43,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 20:15:43,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-21 20:15:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-21 20:15:43,374 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) [2021-10-21 20:15:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-21 20:15:43,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-10-21 20:15:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:43,380 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-21 20:15:43,381 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) [2021-10-21 20:15:43,381 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-21 20:15:43,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 20:15:43,382 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:43,383 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:43,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:15:43,384 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:43,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:43,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2021-10-21 20:15:43,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:43,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607863303] [2021-10-21 20:15:43,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:43,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:43,433 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:43,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494446068] [2021-10-21 20:15:43,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:43,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:43,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:43,436 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:43,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:15:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:43,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 20:15:43,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:43,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:43,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607863303] [2021-10-21 20:15:43,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:43,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494446068] [2021-10-21 20:15:43,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494446068] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:15:43,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:15:43,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:15:43,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819328446] [2021-10-21 20:15:43,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:15:43,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:43,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:15:43,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:15:43,767 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) [2021-10-21 20:15:43,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:43,833 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-10-21 20:15:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:15:43,834 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 [2021-10-21 20:15:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:43,835 INFO L225 Difference]: With dead ends: 29 [2021-10-21 20:15:43,835 INFO L226 Difference]: Without dead ends: 23 [2021-10-21 20:15:43,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:15:43,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-21 20:15:43,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-10-21 20:15:43,840 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) [2021-10-21 20:15:43,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-21 20:15:43,841 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2021-10-21 20:15:43,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:43,842 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-21 20:15:43,842 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) [2021-10-21 20:15:43,842 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-21 20:15:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 20:15:43,843 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:43,843 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:43,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:44,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:44,069 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:44,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:44,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2039286562, now seen corresponding path program 1 times [2021-10-21 20:15:44,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:44,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16863805] [2021-10-21 20:15:44,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:44,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:44,097 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:44,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368460785] [2021-10-21 20:15:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:44,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:44,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:44,100 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:44,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:15:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:44,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 20:15:44,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:44,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:44,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16863805] [2021-10-21 20:15:44,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:44,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368460785] [2021-10-21 20:15:44,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368460785] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:44,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:44,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 20:15:44,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17599076] [2021-10-21 20:15:44,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:15:44,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:44,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:15:44,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:15:44,394 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) [2021-10-21 20:15:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:44,558 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-10-21 20:15:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:15:44,560 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 [2021-10-21 20:15:44,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:44,560 INFO L225 Difference]: With dead ends: 34 [2021-10-21 20:15:44,561 INFO L226 Difference]: Without dead ends: 28 [2021-10-21 20:15:44,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:15:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-21 20:15:44,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-10-21 20:15:44,565 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) [2021-10-21 20:15:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-10-21 20:15:44,566 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2021-10-21 20:15:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:44,567 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-10-21 20:15:44,567 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) [2021-10-21 20:15:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-10-21 20:15:44,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 20:15:44,568 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:44,568 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:44,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:44,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:44,769 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:44,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:44,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2037439520, now seen corresponding path program 1 times [2021-10-21 20:15:44,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:44,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960782752] [2021-10-21 20:15:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:44,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:44,787 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:44,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303396342] [2021-10-21 20:15:44,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:44,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:44,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:44,788 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:44,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 20:15:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:44,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 20:15:44,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:45,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:45,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960782752] [2021-10-21 20:15:45,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:45,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303396342] [2021-10-21 20:15:45,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303396342] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:45,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:45,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 20:15:45,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387484589] [2021-10-21 20:15:45,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:15:45,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:45,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:15:45,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:15:45,023 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) [2021-10-21 20:15:45,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:45,120 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-10-21 20:15:45,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:15:45,121 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 [2021-10-21 20:15:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:45,122 INFO L225 Difference]: With dead ends: 38 [2021-10-21 20:15:45,122 INFO L226 Difference]: Without dead ends: 36 [2021-10-21 20:15:45,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:15:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-21 20:15:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2021-10-21 20:15:45,127 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) [2021-10-21 20:15:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-21 20:15:45,128 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-10-21 20:15:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:45,129 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-21 20:15:45,129 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) [2021-10-21 20:15:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-21 20:15:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:15:45,130 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:45,131 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:45,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:45,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:45,357 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:45,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:45,358 INFO L82 PathProgramCache]: Analyzing trace with hash -878006574, now seen corresponding path program 1 times [2021-10-21 20:15:45,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:45,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932277063] [2021-10-21 20:15:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:45,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:45,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:45,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090777605] [2021-10-21 20:15:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:45,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:45,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:45,385 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:45,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 20:15:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:45,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 20:15:45,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:45,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:45,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932277063] [2021-10-21 20:15:45,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:46,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090777605] [2021-10-21 20:15:46,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090777605] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:46,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:46,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 20:15:46,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676039793] [2021-10-21 20:15:46,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:15:46,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:46,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:15:46,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:15:46,014 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) [2021-10-21 20:15:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:46,250 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-10-21 20:15:46,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 20:15:46,251 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 [2021-10-21 20:15:46,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:46,253 INFO L225 Difference]: With dead ends: 37 [2021-10-21 20:15:46,253 INFO L226 Difference]: Without dead ends: 33 [2021-10-21 20:15:46,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:15:46,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-21 20:15:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-10-21 20:15:46,260 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) [2021-10-21 20:15:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-10-21 20:15:46,261 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2021-10-21 20:15:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:46,262 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-10-21 20:15:46,262 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) [2021-10-21 20:15:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-10-21 20:15:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 20:15:46,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:46,263 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:46,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-21 20:15:46,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:46,482 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:46,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:46,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1508067884, now seen corresponding path program 2 times [2021-10-21 20:15:46,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:46,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796002312] [2021-10-21 20:15:46,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:46,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:46,511 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:46,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947955954] [2021-10-21 20:15:46,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:15:46,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:46,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:46,534 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:46,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 20:15:46,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:15:46,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:46,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 20:15:46,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:47,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:47,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796002312] [2021-10-21 20:15:47,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:47,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947955954] [2021-10-21 20:15:47,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947955954] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:47,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:47,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 20:15:47,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827991321] [2021-10-21 20:15:47,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:15:47,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:47,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:15:47,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:15:47,018 INFO L87 Difference]: Start difference. First operand 25 states and 27 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) [2021-10-21 20:15:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:47,178 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-10-21 20:15:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:15:47,180 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 [2021-10-21 20:15:47,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:47,180 INFO L225 Difference]: With dead ends: 43 [2021-10-21 20:15:47,181 INFO L226 Difference]: Without dead ends: 37 [2021-10-21 20:15:47,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:15:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-21 20:15:47,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-21 20:15:47,189 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) [2021-10-21 20:15:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-10-21 20:15:47,190 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2021-10-21 20:15:47,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:47,191 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-10-21 20:15:47,191 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) [2021-10-21 20:15:47,192 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-10-21 20:15:47,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 20:15:47,193 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:47,193 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:47,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:47,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:47,409 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:47,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1506220842, now seen corresponding path program 1 times [2021-10-21 20:15:47,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:47,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946160524] [2021-10-21 20:15:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:47,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:47,431 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:47,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559342009] [2021-10-21 20:15:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:47,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:47,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:47,442 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:47,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 20:15:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:47,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-21 20:15:47,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:47,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:47,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946160524] [2021-10-21 20:15:47,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:47,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559342009] [2021-10-21 20:15:47,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559342009] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:47,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:47,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 20:15:47,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442992404] [2021-10-21 20:15:47,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:15:47,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:47,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:15:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:15:47,911 INFO L87 Difference]: Start difference. First operand 30 states and 33 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) [2021-10-21 20:15:48,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:48,098 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-10-21 20:15:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:15:48,099 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 19 [2021-10-21 20:15:48,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:48,100 INFO L225 Difference]: With dead ends: 48 [2021-10-21 20:15:48,100 INFO L226 Difference]: Without dead ends: 37 [2021-10-21 20:15:48,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:15:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-21 20:15:48,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-10-21 20:15:48,106 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) [2021-10-21 20:15:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-10-21 20:15:48,107 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19 [2021-10-21 20:15:48,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:48,107 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-10-21 20:15:48,107 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) [2021-10-21 20:15:48,107 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-10-21 20:15:48,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 20:15:48,108 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:48,108 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:48,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:48,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-21 20:15:48,321 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:48,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1901094894, now seen corresponding path program 2 times [2021-10-21 20:15:48,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:48,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654237527] [2021-10-21 20:15:48,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:48,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:48,342 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:48,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946894235] [2021-10-21 20:15:48,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:15:48,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:48,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:48,349 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:48,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 20:15:48,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:15:48,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:48,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 20:15:48,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:48,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:48,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654237527] [2021-10-21 20:15:48,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:48,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946894235] [2021-10-21 20:15:48,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946894235] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:48,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:48,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 20:15:48,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610151666] [2021-10-21 20:15:48,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:15:48,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:48,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:15:48,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:15:48,805 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) [2021-10-21 20:15:49,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:49,076 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-10-21 20:15:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:15:49,077 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 [2021-10-21 20:15:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:49,078 INFO L225 Difference]: With dead ends: 53 [2021-10-21 20:15:49,078 INFO L226 Difference]: Without dead ends: 51 [2021-10-21 20:15:49,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:15:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-21 20:15:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-10-21 20:15:49,085 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) [2021-10-21 20:15:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-10-21 20:15:49,086 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 19 [2021-10-21 20:15:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:49,086 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-10-21 20:15:49,087 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) [2021-10-21 20:15:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-10-21 20:15:49,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 20:15:49,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:49,088 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:49,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:49,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:49,289 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:49,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:49,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1899247852, now seen corresponding path program 2 times [2021-10-21 20:15:49,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:49,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231355883] [2021-10-21 20:15:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:49,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:49,304 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:49,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260104104] [2021-10-21 20:15:49,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:15:49,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:49,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:49,306 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:49,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 20:15:49,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:15:49,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:49,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-21 20:15:49,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:49,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:49,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231355883] [2021-10-21 20:15:49,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:49,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260104104] [2021-10-21 20:15:49,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260104104] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:49,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:49,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 20:15:49,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773876202] [2021-10-21 20:15:49,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:15:49,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:49,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:15:49,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:15:49,773 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) [2021-10-21 20:15:49,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:49,981 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-10-21 20:15:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:15:49,982 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 [2021-10-21 20:15:49,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:49,983 INFO L225 Difference]: With dead ends: 56 [2021-10-21 20:15:49,983 INFO L226 Difference]: Without dead ends: 54 [2021-10-21 20:15:49,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-21 20:15:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-21 20:15:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2021-10-21 20:15:49,992 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) [2021-10-21 20:15:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-10-21 20:15:49,993 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 19 [2021-10-21 20:15:49,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:49,993 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-10-21 20:15:49,993 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) [2021-10-21 20:15:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-10-21 20:15:49,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 20:15:49,994 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:49,994 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:50,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:50,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:50,217 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:50,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:50,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2074315424, now seen corresponding path program 1 times [2021-10-21 20:15:50,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:50,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407774336] [2021-10-21 20:15:50,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:50,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:50,230 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:50,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606805374] [2021-10-21 20:15:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:50,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:50,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:50,232 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:50,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 20:15:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:50,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 20:15:50,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:50,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:50,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407774336] [2021-10-21 20:15:50,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:50,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606805374] [2021-10-21 20:15:50,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606805374] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:50,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:50,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:15:50,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528768248] [2021-10-21 20:15:50,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:15:50,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:50,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:15:50,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:15:50,634 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) [2021-10-21 20:15:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:50,735 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-10-21 20:15:50,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:15:50,736 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 [2021-10-21 20:15:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:50,739 INFO L225 Difference]: With dead ends: 53 [2021-10-21 20:15:50,742 INFO L226 Difference]: Without dead ends: 49 [2021-10-21 20:15:50,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:15:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-21 20:15:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-10-21 20:15:50,752 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) [2021-10-21 20:15:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-10-21 20:15:50,757 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 22 [2021-10-21 20:15:50,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:50,757 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-10-21 20:15:50,757 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) [2021-10-21 20:15:50,758 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-10-21 20:15:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 20:15:50,763 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:50,763 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:50,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:50,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:50,969 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:50,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:50,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1411305246, now seen corresponding path program 2 times [2021-10-21 20:15:50,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:50,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016985207] [2021-10-21 20:15:50,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:50,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:50,989 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:51,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863006515] [2021-10-21 20:15:51,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:15:51,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:51,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:51,003 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:51,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 20:15:51,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:15:51,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:51,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 20:15:51,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:51,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:51,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016985207] [2021-10-21 20:15:51,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:51,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863006515] [2021-10-21 20:15:51,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863006515] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:51,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:51,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 20:15:51,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74234107] [2021-10-21 20:15:51,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 20:15:51,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:51,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 20:15:51,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:15:51,683 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) [2021-10-21 20:15:51,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:51,945 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-10-21 20:15:51,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 20:15:51,946 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 [2021-10-21 20:15:51,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:51,947 INFO L225 Difference]: With dead ends: 53 [2021-10-21 20:15:51,947 INFO L226 Difference]: Without dead ends: 49 [2021-10-21 20:15:51,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 290.7ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-21 20:15:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-21 20:15:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-10-21 20:15:51,961 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) [2021-10-21 20:15:51,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-10-21 20:15:51,962 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 22 [2021-10-21 20:15:51,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:51,963 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-10-21 20:15:51,963 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) [2021-10-21 20:15:51,963 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-10-21 20:15:51,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:15:51,964 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:51,965 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:52,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:52,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:52,192 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:52,193 INFO L82 PathProgramCache]: Analyzing trace with hash 777199262, now seen corresponding path program 3 times [2021-10-21 20:15:52,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:52,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866014291] [2021-10-21 20:15:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:52,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:52,203 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:52,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287013381] [2021-10-21 20:15:52,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:15:52,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:52,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:52,211 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:52,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 20:15:52,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 20:15:52,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:52,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 20:15:52,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 20:15:52,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:52,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866014291] [2021-10-21 20:15:52,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:52,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287013381] [2021-10-21 20:15:52,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287013381] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:52,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:52,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:15:52,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393975206] [2021-10-21 20:15:52,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:15:52,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:52,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:15:52,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:15:52,614 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) [2021-10-21 20:15:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:52,704 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-10-21 20:15:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:15:52,705 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 [2021-10-21 20:15:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:52,706 INFO L225 Difference]: With dead ends: 57 [2021-10-21 20:15:52,706 INFO L226 Difference]: Without dead ends: 51 [2021-10-21 20:15:52,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:15:52,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-21 20:15:52,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-10-21 20:15:52,714 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) [2021-10-21 20:15:52,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-10-21 20:15:52,715 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2021-10-21 20:15:52,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:52,716 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-10-21 20:15:52,716 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) [2021-10-21 20:15:52,716 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-10-21 20:15:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:15:52,717 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:52,717 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:52,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:52,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 20:15:52,942 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:52,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:52,943 INFO L82 PathProgramCache]: Analyzing trace with hash 779046304, now seen corresponding path program 3 times [2021-10-21 20:15:52,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:52,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172813777] [2021-10-21 20:15:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:52,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:52,954 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:52,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828072775] [2021-10-21 20:15:52,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:15:52,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:52,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:52,956 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:52,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 20:15:53,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 20:15:53,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:53,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 20:15:53,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 20:15:53,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:53,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172813777] [2021-10-21 20:15:53,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:53,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828072775] [2021-10-21 20:15:53,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828072775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:53,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:53,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 20:15:53,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455467526] [2021-10-21 20:15:53,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:15:53,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:53,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:15:53,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:15:53,719 INFO L87 Difference]: Start difference. First operand 45 states and 50 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) [2021-10-21 20:15:53,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:53,966 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-10-21 20:15:53,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 20:15:53,967 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 24 [2021-10-21 20:15:53,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:53,968 INFO L225 Difference]: With dead ends: 62 [2021-10-21 20:15:53,968 INFO L226 Difference]: Without dead ends: 60 [2021-10-21 20:15:53,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-10-21 20:15:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-21 20:15:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-10-21 20:15:53,983 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) [2021-10-21 20:15:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-10-21 20:15:53,984 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 24 [2021-10-21 20:15:53,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:53,984 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-10-21 20:15:53,985 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) [2021-10-21 20:15:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-10-21 20:15:53,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:15:53,990 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:53,990 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:54,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:54,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 20:15:54,218 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:54,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:54,218 INFO L82 PathProgramCache]: Analyzing trace with hash -500817374, now seen corresponding path program 4 times [2021-10-21 20:15:54,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:54,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785689133] [2021-10-21 20:15:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:54,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:54,243 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:54,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741787063] [2021-10-21 20:15:54,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:15:54,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:54,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:54,250 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:54,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 20:15:54,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:15:54,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:54,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 20:15:54,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:54,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:54,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785689133] [2021-10-21 20:15:54,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:54,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741787063] [2021-10-21 20:15:54,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741787063] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:54,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:54,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 20:15:54,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026757261] [2021-10-21 20:15:54,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:15:54,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:54,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:15:54,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:15:54,946 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) [2021-10-21 20:15:55,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:55,207 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-10-21 20:15:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:15:55,208 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 [2021-10-21 20:15:55,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:55,208 INFO L225 Difference]: With dead ends: 82 [2021-10-21 20:15:55,209 INFO L226 Difference]: Without dead ends: 66 [2021-10-21 20:15:55,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:15:55,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-21 20:15:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-10-21 20:15:55,218 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) [2021-10-21 20:15:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-10-21 20:15:55,219 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 24 [2021-10-21 20:15:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:55,219 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-10-21 20:15:55,220 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) [2021-10-21 20:15:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-10-21 20:15:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:15:55,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:55,221 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:55,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:55,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:55,441 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:55,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:55,441 INFO L82 PathProgramCache]: Analyzing trace with hash -895691426, now seen corresponding path program 5 times [2021-10-21 20:15:55,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:55,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396301531] [2021-10-21 20:15:55,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:55,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:55,450 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:55,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697407152] [2021-10-21 20:15:55,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:15:55,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:55,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:55,453 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:55,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 20:15:55,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-21 20:15:55,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:55,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-21 20:15:55,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:56,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:56,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396301531] [2021-10-21 20:15:56,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:56,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697407152] [2021-10-21 20:15:56,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697407152] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:56,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:56,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-21 20:15:56,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759176627] [2021-10-21 20:15:56,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 20:15:56,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:56,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 20:15:56,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:15:56,184 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) [2021-10-21 20:15:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:57,392 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-10-21 20:15:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 20:15:57,393 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 [2021-10-21 20:15:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:57,394 INFO L225 Difference]: With dead ends: 72 [2021-10-21 20:15:57,394 INFO L226 Difference]: Without dead ends: 70 [2021-10-21 20:15:57,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 295.0ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:15:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-21 20:15:57,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2021-10-21 20:15:57,424 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) [2021-10-21 20:15:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-10-21 20:15:57,426 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 24 [2021-10-21 20:15:57,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:57,427 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-10-21 20:15:57,427 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) [2021-10-21 20:15:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-10-21 20:15:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:15:57,428 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:57,428 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:57,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:57,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 20:15:57,634 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:15:57,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:57,635 INFO L82 PathProgramCache]: Analyzing trace with hash -893844384, now seen corresponding path program 3 times [2021-10-21 20:15:57,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:57,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054585403] [2021-10-21 20:15:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:57,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:57,645 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:57,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299885196] [2021-10-21 20:15:57,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:15:57,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:57,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:57,660 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:57,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 20:15:58,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 20:15:58,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:58,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-21 20:15:58,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 20:15:59,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:59,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054585403] [2021-10-21 20:15:59,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:59,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299885196] [2021-10-21 20:15:59,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299885196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:59,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:59,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 20:15:59,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384605138] [2021-10-21 20:15:59,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 20:15:59,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:59,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 20:15:59,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:15:59,579 INFO L87 Difference]: Start difference. First operand 59 states and 67 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) [2021-10-21 20:16:00,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:16:00,874 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-10-21 20:16:00,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:16:00,874 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 24 [2021-10-21 20:16:00,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:16:00,877 INFO L225 Difference]: With dead ends: 59 [2021-10-21 20:16:00,878 INFO L226 Difference]: Without dead ends: 57 [2021-10-21 20:16:00,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1493.5ms TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2021-10-21 20:16:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-21 20:16:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2021-10-21 20:16:00,885 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) [2021-10-21 20:16:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-21 20:16:00,885 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 24 [2021-10-21 20:16:00,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:16:00,885 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-21 20:16:00,885 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) [2021-10-21 20:16:00,886 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-21 20:16:00,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 20:16:00,886 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:16:00,886 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:16:00,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-21 20:16:01,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:01,087 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:16:01,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:16:01,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1429918446, now seen corresponding path program 2 times [2021-10-21 20:16:01,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:16:01,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928501464] [2021-10-21 20:16:01,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:16:01,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:16:01,098 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:16:01,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597383590] [2021-10-21 20:16:01,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:16:01,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:01,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:16:01,100 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:16:01,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 20:16:01,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:16:01,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:16:01,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 20:16:01,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:16:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:16:01,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:16:01,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928501464] [2021-10-21 20:16:01,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:16:01,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597383590] [2021-10-21 20:16:01,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597383590] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:16:01,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:16:01,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 20:16:01,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132477350] [2021-10-21 20:16:01,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:16:01,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:16:01,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:16:01,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:16:01,689 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) [2021-10-21 20:16:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:16:01,967 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2021-10-21 20:16:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:16:01,968 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 [2021-10-21 20:16:01,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:16:01,968 INFO L225 Difference]: With dead ends: 63 [2021-10-21 20:16:01,969 INFO L226 Difference]: Without dead ends: 59 [2021-10-21 20:16:01,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:16:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-21 20:16:01,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-10-21 20:16:01,979 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) [2021-10-21 20:16:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-10-21 20:16:01,979 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 27 [2021-10-21 20:16:01,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:16:01,979 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-10-21 20:16:01,979 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) [2021-10-21 20:16:01,980 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-10-21 20:16:01,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 20:16:01,980 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:16:01,980 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:16:01,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 20:16:02,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 20:16:02,185 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:16:02,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:16:02,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1207377834, now seen corresponding path program 3 times [2021-10-21 20:16:02,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:16:02,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388427595] [2021-10-21 20:16:02,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:16:02,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:16:02,195 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:16:02,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607226965] [2021-10-21 20:16:02,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:16:02,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:02,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:16:02,197 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:16:02,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 20:16:02,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 20:16:02,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:16:02,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 20:16:02,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:16:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 20:16:04,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:16:04,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388427595] [2021-10-21 20:16:04,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:16:04,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607226965] [2021-10-21 20:16:04,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607226965] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:16:04,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:16:04,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-21 20:16:04,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298330614] [2021-10-21 20:16:04,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 20:16:04,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:16:04,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 20:16:04,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:16:04,842 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) [2021-10-21 20:16:07,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:16:07,297 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-10-21 20:16:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 20:16:07,298 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 [2021-10-21 20:16:07,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:16:07,298 INFO L225 Difference]: With dead ends: 68 [2021-10-21 20:16:07,298 INFO L226 Difference]: Without dead ends: 64 [2021-10-21 20:16:07,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3063.7ms TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2021-10-21 20:16:07,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-21 20:16:07,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2021-10-21 20:16:07,307 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) [2021-10-21 20:16:07,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-21 20:16:07,308 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2021-10-21 20:16:07,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:16:07,308 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-21 20:16:07,308 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) [2021-10-21 20:16:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-21 20:16:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 20:16:07,309 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:16:07,309 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:16:07,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 20:16:07,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 20:16:07,516 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:16:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:16:07,516 INFO L82 PathProgramCache]: Analyzing trace with hash 870904144, now seen corresponding path program 4 times [2021-10-21 20:16:07,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:16:07,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840536200] [2021-10-21 20:16:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:16:07,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:16:07,531 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:16:07,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967522928] [2021-10-21 20:16:07,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:16:07,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:07,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:16:07,533 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:16:07,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 20:16:07,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:16:07,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:16:07,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 20:16:07,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:16:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:16:08,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:16:08,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840536200] [2021-10-21 20:16:08,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:16:08,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967522928] [2021-10-21 20:16:08,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967522928] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:16:08,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:16:08,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 20:16:08,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140642121] [2021-10-21 20:16:08,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 20:16:08,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:16:08,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:16:08,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:16:08,433 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) [2021-10-21 20:16:08,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:16:08,808 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-10-21 20:16:08,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:16:08,809 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 [2021-10-21 20:16:08,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:16:08,809 INFO L225 Difference]: With dead ends: 61 [2021-10-21 20:16:08,809 INFO L226 Difference]: Without dead ends: 57 [2021-10-21 20:16:08,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 284.5ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:16:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-21 20:16:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2021-10-21 20:16:08,814 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) [2021-10-21 20:16:08,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-21 20:16:08,815 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2021-10-21 20:16:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:16:08,815 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-21 20:16:08,815 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) [2021-10-21 20:16:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-21 20:16:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 20:16:08,816 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:16:08,816 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:16:08,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 20:16:09,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:09,021 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:16:09,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:16:09,021 INFO L82 PathProgramCache]: Analyzing trace with hash 284098130, now seen corresponding path program 3 times [2021-10-21 20:16:09,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:16:09,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979310683] [2021-10-21 20:16:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:16:09,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:16:09,027 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:16:09,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672979639] [2021-10-21 20:16:09,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:16:09,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:09,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:16:09,036 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:16:09,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 20:16:09,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 20:16:09,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:16:09,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 20:16:09,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:16:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 20:16:10,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:16:10,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979310683] [2021-10-21 20:16:10,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:16:10,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672979639] [2021-10-21 20:16:10,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672979639] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:16:10,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:16:10,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:16:10,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033678255] [2021-10-21 20:16:10,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:16:10,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:16:10,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:16:10,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:16:10,330 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) [2021-10-21 20:16:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:16:11,339 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-10-21 20:16:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:16:11,340 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 [2021-10-21 20:16:11,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:16:11,340 INFO L225 Difference]: With dead ends: 48 [2021-10-21 20:16:11,340 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 20:16:11,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1192.0ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:16:11,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 20:16:11,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 20:16:11,342 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) [2021-10-21 20:16:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 20:16:11,342 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-10-21 20:16:11,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:16:11,342 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:16:11,342 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) [2021-10-21 20:16:11,342 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 20:16:11,342 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 20:16:11,345 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:16:11,346 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:16:11,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 20:16:11,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:11,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-21 20:16:11,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:16:11,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:16:11,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:16:11,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:16:12,182 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-10-21 20:16:12,182 INFO L860 garLoopResultBuilder]: At program point L52(lines 21 53) the Hoare annotation is: true [2021-10-21 20:16:12,182 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 16) no Hoare annotation was computed. [2021-10-21 20:16:12,182 INFO L857 garLoopResultBuilder]: For program point L15-1(lines 15 16) no Hoare annotation was computed. [2021-10-21 20:16:12,183 INFO L857 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2021-10-21 20:16:12,183 INFO L857 garLoopResultBuilder]: For program point L11-2(line 11) no Hoare annotation was computed. [2021-10-21 20:16:12,183 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 45) no Hoare annotation was computed. [2021-10-21 20:16:12,183 INFO L857 garLoopResultBuilder]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2021-10-21 20:16:12,183 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-21 20:16:12,183 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)) (.cse2 (* 2 ULTIMATE.start_main_~Y~0)) (.cse4 (<= ULTIMATE.start_main_~X~0 10)) (.cse5 (<= ULTIMATE.start_main_~Y~0 10)) (.cse6 (<= 0 ULTIMATE.start_main_~Y~0))) (or (let ((.cse3 (* 2 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~X~0))) (.cse1 (* 2 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~Y~0)))) (and (<= 0 ULTIMATE.start_main_~X~0) .cse0 (= (+ .cse1 .cse2) (+ ULTIMATE.start_main_~X~0 ULTIMATE.start_main_~v~0 .cse3)) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse4 .cse5 .cse6 (<= .cse3 (+ ULTIMATE.start_main_~X~0 .cse1)) (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1)))) (and (= ULTIMATE.start_main_~y~0 0) (= ULTIMATE.start_main_~x~0 0) .cse0 (= .cse2 (+ ULTIMATE.start_main_~X~0 ULTIMATE.start_main_~v~0)) .cse4 .cse5 .cse6 (<= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~X~0)))) [2021-10-21 20:16:12,183 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-21 20:16:12,183 INFO L857 garLoopResultBuilder]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2021-10-21 20:16:12,184 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-21 20:16:12,184 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-10-21 20:16:12,184 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-21 20:16:12,184 INFO L857 garLoopResultBuilder]: For program point L14(lines 14 17) no Hoare annotation was computed. [2021-10-21 20:16:12,184 INFO L853 garLoopResultBuilder]: At program point L14-2(lines 36 37) the Hoare annotation is: (let ((.cse1 (* 2 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~X~0))) (.cse0 (* 2 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~Y~0)))) (and (<= 0 ULTIMATE.start_main_~X~0) (= ULTIMATE.start_assume_abort_if_not_~cond 1) (= (+ .cse0 (* 2 ULTIMATE.start_main_~Y~0)) (+ ULTIMATE.start_main_~X~0 ULTIMATE.start_main_~v~0 .cse1)) (<= ULTIMATE.start_main_~X~0 10) (<= ULTIMATE.start_main_~Y~0 10) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 0 ULTIMATE.start_main_~Y~0) (<= .cse1 (+ ULTIMATE.start_main_~X~0 .cse0)) (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1)))) [2021-10-21 20:16:12,184 INFO L857 garLoopResultBuilder]: For program point L14-3(lines 14 17) no Hoare annotation was computed. [2021-10-21 20:16:12,184 INFO L857 garLoopResultBuilder]: For program point L10(lines 10 12) no Hoare annotation was computed. [2021-10-21 20:16:12,184 INFO L857 garLoopResultBuilder]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2021-10-21 20:16:12,185 INFO L860 garLoopResultBuilder]: At program point L14-5(lines 13 19) the Hoare annotation is: true [2021-10-21 20:16:12,190 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:16:12,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:16:12 BoogieIcfgContainer [2021-10-21 20:16:12,216 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:16:12,216 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:16:12,216 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:16:12,217 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:16:12,217 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:15:42" (3/4) ... [2021-10-21 20:16:12,226 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 20:16:12,239 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-21 20:16:12,240 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 20:16:12,240 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:16:12,240 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:16:12,291 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:16:12,291 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:16:12,293 INFO L168 Benchmark]: Toolchain (without parser) took 30087.63 ms. Allocated memory was 111.1 MB in the beginning and 172.0 MB in the end (delta: 60.8 MB). Free memory was 79.3 MB in the beginning and 87.7 MB in the end (delta: -8.4 MB). Peak memory consumption was 51.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:12,293 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 111.1 MB. Free memory is still 66.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:16:12,295 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.24 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 78.9 MB in the beginning and 117.0 MB in the end (delta: -38.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:12,295 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.74 ms. Allocated memory is still 142.6 MB. Free memory was 117.0 MB in the beginning and 115.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:12,295 INFO L168 Benchmark]: Boogie Preprocessor took 24.56 ms. Allocated memory is still 142.6 MB. Free memory was 115.3 MB in the beginning and 114.4 MB in the end (delta: 933.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:12,296 INFO L168 Benchmark]: RCFGBuilder took 348.71 ms. Allocated memory is still 142.6 MB. Free memory was 114.4 MB in the beginning and 103.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:12,297 INFO L168 Benchmark]: TraceAbstraction took 29319.59 ms. Allocated memory was 142.6 MB in the beginning and 172.0 MB in the end (delta: 29.4 MB). Free memory was 103.3 MB in the beginning and 90.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 44.0 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:12,297 INFO L168 Benchmark]: Witness Printer took 75.05 ms. Allocated memory is still 172.0 MB. Free memory was 90.8 MB in the beginning and 87.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:12,300 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 111.1 MB. Free memory is still 66.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 266.24 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 78.9 MB in the beginning and 117.0 MB in the end (delta: -38.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.74 ms. Allocated memory is still 142.6 MB. Free memory was 117.0 MB in the beginning and 115.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.56 ms. Allocated memory is still 142.6 MB. Free memory was 115.3 MB in the beginning and 114.4 MB in the end (delta: 933.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 348.71 ms. Allocated memory is still 142.6 MB. Free memory was 114.4 MB in the beginning and 103.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 29319.59 ms. Allocated memory was 142.6 MB in the beginning and 172.0 MB in the end (delta: 29.4 MB). Free memory was 103.3 MB in the beginning and 90.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 44.0 MB. Max. memory is 16.1 GB. * Witness Printer took 75.05 ms. Allocated memory is still 172.0 MB. Free memory was 90.8 MB in the beginning and 87.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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: 29190.2ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 35.0ms, AutomataDifference: 9121.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 619.7ms, InitialAbstractionConstructionTime: 13.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 247 SDtfs, 337 SDslu, 845 SDs, 0 SdLazy, 2204 SolverSat, 205 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3200.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 473 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 8299.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=15, InterpolantAutomatonStates: 200, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 199.3ms AutomataMinimizationTime, 20 MinimizatonAttempts, 136 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 22 NumberOfFragments, 142 HoareAnnotationTreeSize, 4 FomulaSimplifications, 10697 FormulaSimplificationTreeSizeReduction, 254.8ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 724 FormulaSimplificationTreeSizeReductionInter, 357.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 137.3ms SsaConstructionTime, 1617.3ms SatisfiabilityAnalysisTime, 9670.2ms InterpolantComputationTime, 411 NumberOfCodeBlocks, 370 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 391 ConstructedInterpolants, 0 QuantifiedInterpolants, 4814 SizeOfPredicates, 212 NumberOfNonLiveVariables, 1799 ConjunctsInSsa, 518 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 97/266 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: ((((((((0 <= X && cond == 1) && 2 * (x * Y) + 2 * Y == X + v + 2 * (y * X)) && 1 <= cond) && X <= 10) && Y <= 10) && 0 <= Y) && 2 * (y * X) <= X + 2 * (x * Y)) && x <= X + 1) || (((((((y == 0 && x == 0) && cond == 1) && 2 * Y == X + v) && X <= 10) && Y <= 10) && 0 <= Y) && x <= X) - 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)) && X <= 10) && Y <= 10) && 1 == cond) && 0 <= Y) && 2 * (y * X) <= X + 2 * (x * Y)) && x <= X + 1 RESULT: Ultimate proved your program to be correct! [2021-10-21 20:16:12,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6aecbf-e084-467e-b97b-17f9688b4598/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...