./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/geo3-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/geo3-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt --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 377e945aff2ed4cca924d2dd3aae9ae493c62515 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:41:50,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:41:50,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:41:50,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:41:50,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:41:50,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:41:50,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:41:50,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:41:50,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:41:50,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:41:50,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:41:50,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:41:50,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:41:50,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:41:50,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:41:50,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:41:50,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:41:50,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:41:50,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:41:50,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:41:50,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:41:50,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:41:50,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:41:50,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:41:50,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:41:50,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:41:50,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:41:50,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:41:50,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:41:50,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:41:50,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:41:50,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:41:50,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:41:50,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:41:50,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:41:50,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:41:50,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:41:50,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:41:50,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:41:50,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:41:50,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:41:50,464 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 00:41:50,508 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:41:50,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:41:50,509 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:41:50,509 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:41:50,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:41:50,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:41:50,513 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:41:50,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:41:50,513 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:41:50,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:41:50,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:41:50,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:41:50,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:41:50,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:41:50,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:41:50,516 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:41:50,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:41:50,517 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:41:50,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:41:50,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:41:50,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:41:50,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:41:50,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:41:50,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:41:50,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:41:50,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:41:50,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:41:50,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:41:50,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:41:50,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:41:50,522 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_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 377e945aff2ed4cca924d2dd3aae9ae493c62515 [2021-10-13 00:41:50,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:41:50,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:41:50,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:41:50,841 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:41:50,842 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:41:50,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/nla-digbench-scaling/geo3-ll_valuebound20.c [2021-10-13 00:41:50,942 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/data/b2dec87e3/3d84e04998c4466d916a5dff58298cba/FLAGecaaf374b [2021-10-13 00:41:51,488 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:41:51,489 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/sv-benchmarks/c/nla-digbench-scaling/geo3-ll_valuebound20.c [2021-10-13 00:41:51,501 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/data/b2dec87e3/3d84e04998c4466d916a5dff58298cba/FLAGecaaf374b [2021-10-13 00:41:51,863 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/data/b2dec87e3/3d84e04998c4466d916a5dff58298cba [2021-10-13 00:41:51,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:41:51,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:41:51,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:41:51,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:41:51,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:41:51,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:41:51" (1/1) ... [2021-10-13 00:41:51,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75483cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:51, skipping insertion in model container [2021-10-13 00:41:51,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:41:51" (1/1) ... [2021-10-13 00:41:51,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:41:51,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:41:52,029 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_3b427b29-6d18-40f4-89ec-1c281ece2fbb/sv-benchmarks/c/nla-digbench-scaling/geo3-ll_valuebound20.c[525,538] [2021-10-13 00:41:52,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:41:52,074 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:41:52,089 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_3b427b29-6d18-40f4-89ec-1c281ece2fbb/sv-benchmarks/c/nla-digbench-scaling/geo3-ll_valuebound20.c[525,538] [2021-10-13 00:41:52,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:41:52,112 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:41:52,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:52 WrapperNode [2021-10-13 00:41:52,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:41:52,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:41:52,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:41:52,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:41:52,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:52" (1/1) ... [2021-10-13 00:41:52,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:52" (1/1) ... [2021-10-13 00:41:52,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:41:52,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:41:52,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:41:52,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:41:52,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:52" (1/1) ... [2021-10-13 00:41:52,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:52" (1/1) ... [2021-10-13 00:41:52,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:52" (1/1) ... [2021-10-13 00:41:52,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:52" (1/1) ... [2021-10-13 00:41:52,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:52" (1/1) ... [2021-10-13 00:41:52,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:52" (1/1) ... [2021-10-13 00:41:52,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:52" (1/1) ... [2021-10-13 00:41:52,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:41:52,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:41:52,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:41:52,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:41:52,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:52" (1/1) ... [2021-10-13 00:41:52,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:41:52,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:41:52,230 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:41:52,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:41:52,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:41:52,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:41:52,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:41:52,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:41:52,604 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:41:52,605 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 00:41:52,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:41:52 BoogieIcfgContainer [2021-10-13 00:41:52,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:41:52,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:41:52,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:41:52,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:41:52,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:41:51" (1/3) ... [2021-10-13 00:41:52,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2960e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:41:52, skipping insertion in model container [2021-10-13 00:41:52,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:52" (2/3) ... [2021-10-13 00:41:52,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2960e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:41:52, skipping insertion in model container [2021-10-13 00:41:52,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:41:52" (3/3) ... [2021-10-13 00:41:52,631 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_valuebound20.c [2021-10-13 00:41:52,637 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:41:52,638 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-13 00:41:52,704 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:41:52,722 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-13 00:41:52,735 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-13 00:41:52,758 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) [2021-10-13 00:41:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:41:52,781 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:52,782 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:52,782 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:41:52,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:52,790 INFO L82 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2021-10-13 00:41:52,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:52,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142243515] [2021-10-13 00:41:52,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:52,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:52,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:52,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142243515] [2021-10-13 00:41:52,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142243515] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:52,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:52,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:41:52,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218975795] [2021-10-13 00:41:52,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 00:41:52,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:53,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 00:41:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:41:53,015 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:41:53,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:53,038 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-10-13 00:41:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:41:53,040 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 00:41:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:53,053 INFO L225 Difference]: With dead ends: 39 [2021-10-13 00:41:53,053 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 00:41:53,056 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 [2021-10-13 00:41:53,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 00:41:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-13 00:41:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 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) [2021-10-13 00:41:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-10-13 00:41:53,090 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2021-10-13 00:41:53,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:53,091 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-10-13 00:41:53,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:41:53,091 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-10-13 00:41:53,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:41:53,092 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:53,092 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:53,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:41:53,093 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:41:53,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:53,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2021-10-13 00:41:53,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:53,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128722028] [2021-10-13 00:41:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:53,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:53,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:41:53,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296509336] [2021-10-13 00:41:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:53,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:53,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:41:53,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:41:53,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:41:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:53,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:41:53,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:41:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:53,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:53,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128722028] [2021-10-13 00:41:53,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:41:53,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296509336] [2021-10-13 00:41:53,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296509336] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:53,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:53,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:41:53,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923710875] [2021-10-13 00:41:53,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:41:53,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:53,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:41:53,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:41:53,535 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:41:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:53,584 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-10-13 00:41:53,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:41:53,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 00:41:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:53,586 INFO L225 Difference]: With dead ends: 27 [2021-10-13 00:41:53,586 INFO L226 Difference]: Without dead ends: 21 [2021-10-13 00:41:53,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:41:53,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-13 00:41:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-10-13 00:41:53,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 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) [2021-10-13 00:41:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-10-13 00:41:53,593 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2021-10-13 00:41:53,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:53,594 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-10-13 00:41:53,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:41:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-10-13 00:41:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:41:53,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:53,595 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:53,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:41:53,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:53,812 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:41:53,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:53,820 INFO L82 PathProgramCache]: Analyzing trace with hash -937492348, now seen corresponding path program 1 times [2021-10-13 00:41:53,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:53,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522324655] [2021-10-13 00:41:53,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:53,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:53,863 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:41:53,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742402298] [2021-10-13 00:41:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:53,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:53,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:41:53,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:41:53,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:41:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:53,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 00:41:53,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:41:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:54,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:54,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522324655] [2021-10-13 00:41:54,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:41:54,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742402298] [2021-10-13 00:41:54,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742402298] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:41:54,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:41:54,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-13 00:41:54,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106321605] [2021-10-13 00:41:54,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:41:54,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:41:54,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:41:54,317 INFO L87 Difference]: Start difference. First operand 20 states and 20 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) [2021-10-13 00:41:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:54,601 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-10-13 00:41:54,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:41:54,601 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 [2021-10-13 00:41:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:54,602 INFO L225 Difference]: With dead ends: 30 [2021-10-13 00:41:54,603 INFO L226 Difference]: Without dead ends: 24 [2021-10-13 00:41:54,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:41:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-13 00:41:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-10-13 00:41:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:41:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-10-13 00:41:54,609 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14 [2021-10-13 00:41:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:54,610 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-10-13 00:41:54,610 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) [2021-10-13 00:41:54,610 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-10-13 00:41:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 00:41:54,611 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:54,611 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:54,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:41:54,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:54,839 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:41:54,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:54,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1342734009, now seen corresponding path program 2 times [2021-10-13 00:41:54,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:54,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038888654] [2021-10-13 00:41:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:54,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:54,859 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:41:54,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660560896] [2021-10-13 00:41:54,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:41:54,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:54,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:41:54,863 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:41:54,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:41:54,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:41:54,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:41:54,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 00:41:54,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:41:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:55,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:55,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038888654] [2021-10-13 00:41:55,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:41:55,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660560896] [2021-10-13 00:41:55,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660560896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:41:55,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:41:55,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-13 00:41:55,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5908106] [2021-10-13 00:41:55,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:41:55,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:55,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:41:55,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:41:55,654 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-10-13 00:41:55,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:55,860 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-10-13 00:41:55,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:41:55,862 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-10-13 00:41:55,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:55,863 INFO L225 Difference]: With dead ends: 33 [2021-10-13 00:41:55,863 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 00:41:55,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:41:55,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 00:41:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-10-13 00:41:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:41:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-10-13 00:41:55,870 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2021-10-13 00:41:55,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:55,870 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-10-13 00:41:55,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-10-13 00:41:55,871 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-10-13 00:41:55,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 00:41:55,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:55,872 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:55,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:41:56,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:56,092 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:41:56,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:56,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1931585436, now seen corresponding path program 3 times [2021-10-13 00:41:56,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:56,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581480921] [2021-10-13 00:41:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:56,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:56,124 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:41:56,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588091509] [2021-10-13 00:41:56,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:41:56,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:56,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:41:56,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:41:56,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:41:57,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:41:57,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:41:57,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 00:41:57,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:11,315 WARN L207 SmtUtils]: Spent 6.08 s on a formula simplification that was a NOOP. DAG size: 33 [2021-10-13 00:42:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 00:42:43,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:43,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581480921] [2021-10-13 00:42:43,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:42:43,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588091509] [2021-10-13 00:42:43,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588091509] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:43,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:42:43,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-13 00:42:43,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621468450] [2021-10-13 00:42:43,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 00:42:43,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:43,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 00:42:43,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=91, Unknown=2, NotChecked=0, Total=132 [2021-10-13 00:42:43,942 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2021-10-13 00:43:07,433 WARN L207 SmtUtils]: Spent 14.65 s on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-10-13 00:43:17,065 WARN L207 SmtUtils]: Spent 5.58 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-10-13 00:43:38,847 WARN L207 SmtUtils]: Spent 21.69 s on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-10-13 00:43:40,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:43:40,870 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-10-13 00:43:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:43:40,870 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-13 00:43:40,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:43:40,870 INFO L225 Difference]: With dead ends: 26 [2021-10-13 00:43:40,870 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 00:43:40,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 55949.1ms TimeCoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2021-10-13 00:43:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 00:43:40,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 00:43:40,872 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) [2021-10-13 00:43:40,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 00:43:40,872 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-10-13 00:43:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:43:40,872 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:43:40,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2021-10-13 00:43:40,873 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 00:43:40,873 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 00:43:40,875 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:43:40,876 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:43:40,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-13 00:43:41,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:43:41,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 00:43:41,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:43:41,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:43:41,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:43:41,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:43:50,229 WARN L207 SmtUtils]: Spent 9.08 s on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-10-13 00:43:55,748 WARN L207 SmtUtils]: Spent 5.52 s on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-10-13 00:43:55,750 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-10-13 00:43:55,751 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-10-13 00:43:55,751 INFO L853 garLoopResultBuilder]: At program point L15-2(lines 39 40) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~z~0 20)) (.cse5 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0)) (.cse1 (<= ULTIMATE.start_main_~a~0 20)) (.cse2 (= (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~z~0) ULTIMATE.start_main_~az~0)) (.cse3 (<= 0 ULTIMATE.start_main_~z~0)) (.cse4 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse6 (<= 0 ULTIMATE.start_main_~a~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (or (= ULTIMATE.start_main_~y~0 0) (and (= 0 (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) (not (= ULTIMATE.start_main_~z~0 0)))) (or .cse5 (= (mod (+ ULTIMATE.start_main_~x~0 (* ULTIMATE.start_main_~a~0 (- 1))) ULTIMATE.start_main_~z~0) 0)) .cse6 (= (+ ULTIMATE.start_main_~a~0 (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0)) (+ (* ULTIMATE.start_main_~az~0 ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~x~0))) (and .cse0 .cse5 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~y~0 1) .cse6))) [2021-10-13 00:43:55,751 INFO L857 garLoopResultBuilder]: For program point L15-3(lines 15 18) no Hoare annotation was computed. [2021-10-13 00:43:55,751 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2021-10-13 00:43:55,751 INFO L857 garLoopResultBuilder]: For program point L11-1(lines 11 13) no Hoare annotation was computed. [2021-10-13 00:43:55,752 INFO L860 garLoopResultBuilder]: At program point L15-5(lines 14 20) the Hoare annotation is: true [2021-10-13 00:43:55,752 INFO L857 garLoopResultBuilder]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2021-10-13 00:43:55,752 INFO L853 garLoopResultBuilder]: At program point L36-2(lines 36 45) the Hoare annotation is: (let ((.cse6 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~z~0))) (let ((.cse0 (<= ULTIMATE.start_main_~z~0 20)) (.cse2 (<= ULTIMATE.start_main_~a~0 20)) (.cse3 (= .cse6 ULTIMATE.start_main_~az~0)) (.cse4 (<= 0 ULTIMATE.start_main_~z~0)) (.cse5 (<= 0 ULTIMATE.start_main_~a~0)) (.cse1 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~y~0 1) .cse5) (and .cse0 .cse2 .cse3 .cse4 (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0) .cse5 (= (+ .cse6 ULTIMATE.start_main_~a~0) ULTIMATE.start_main_~x~0)) (let ((.cse10 (* ULTIMATE.start_main_~a~0 (- 1))) (.cse8 (= ULTIMATE.start_main_~z~0 0))) (let ((.cse7 (not .cse8)) (.cse12 (+ ULTIMATE.start_main_~x~0 .cse10))) (and .cse0 (or (= ULTIMATE.start_main_~y~0 0) .cse7) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse2 .cse3 .cse4 (or .cse8 (let ((.cse9 (div .cse12 ULTIMATE.start_main_~z~0)) (.cse11 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0))) (and (= (mod (+ .cse9 .cse10) ULTIMATE.start_main_~z~0) 0) (= 0 (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) (= (+ ULTIMATE.start_main_~a~0 (* ULTIMATE.start_main_~z~0 .cse9)) (+ .cse9 (* .cse11 ULTIMATE.start_main_~az~0))) (= (mod .cse11 ULTIMATE.start_main_~z~0) 0)))) .cse5 (or .cse1 (and .cse7 (= (mod .cse12 ULTIMATE.start_main_~z~0) 0))))))))) [2021-10-13 00:43:55,752 INFO L857 garLoopResultBuilder]: For program point L36-3(lines 36 45) no Hoare annotation was computed. [2021-10-13 00:43:55,752 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 00:43:55,753 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 00:43:55,753 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 00:43:55,753 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-10-13 00:43:55,753 INFO L857 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-10-13 00:43:55,753 INFO L857 garLoopResultBuilder]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2021-10-13 00:43:55,753 INFO L857 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-10-13 00:43:55,754 INFO L857 garLoopResultBuilder]: For program point L12-2(line 12) no Hoare annotation was computed. [2021-10-13 00:43:55,754 INFO L857 garLoopResultBuilder]: For program point L12-4(line 12) no Hoare annotation was computed. [2021-10-13 00:43:55,754 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 00:43:55,754 INFO L860 garLoopResultBuilder]: At program point L47(lines 21 48) the Hoare annotation is: true [2021-10-13 00:43:55,758 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:43:55,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:43:55 BoogieIcfgContainer [2021-10-13 00:43:55,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:43:55,790 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:43:55,790 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:43:55,790 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:43:55,791 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:41:52" (3/4) ... [2021-10-13 00:43:55,794 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 00:43:55,805 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-13 00:43:55,806 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 00:43:55,806 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:43:55,807 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:43:55,883 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:43:55,884 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:43:55,885 INFO L168 Benchmark]: Toolchain (without parser) took 124017.10 ms. Allocated memory was 98.6 MB in the beginning and 140.5 MB in the end (delta: 41.9 MB). Free memory was 69.7 MB in the beginning and 101.7 MB in the end (delta: -31.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:43:55,886 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 98.6 MB. Free memory was 53.9 MB in the beginning and 53.8 MB in the end (delta: 54.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:43:55,886 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.46 ms. Allocated memory was 98.6 MB in the beginning and 140.5 MB in the end (delta: 41.9 MB). Free memory was 69.5 MB in the beginning and 116.6 MB in the end (delta: -47.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:43:55,887 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.06 ms. Allocated memory is still 140.5 MB. Free memory was 116.6 MB in the beginning and 115.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:43:55,887 INFO L168 Benchmark]: Boogie Preprocessor took 25.54 ms. Allocated memory is still 140.5 MB. Free memory was 115.1 MB in the beginning and 114.2 MB in the end (delta: 900.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:43:55,888 INFO L168 Benchmark]: RCFGBuilder took 425.79 ms. Allocated memory is still 140.5 MB. Free memory was 114.2 MB in the beginning and 104.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:43:55,888 INFO L168 Benchmark]: TraceAbstraction took 123165.63 ms. Allocated memory is still 140.5 MB. Free memory was 104.0 MB in the beginning and 103.8 MB in the end (delta: 212.9 kB). Peak memory consumption was 66.9 MB. Max. memory is 16.1 GB. [2021-10-13 00:43:55,889 INFO L168 Benchmark]: Witness Printer took 94.02 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 101.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:43:55,892 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 98.6 MB. Free memory was 53.9 MB in the beginning and 53.8 MB in the end (delta: 54.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 244.46 ms. Allocated memory was 98.6 MB in the beginning and 140.5 MB in the end (delta: 41.9 MB). Free memory was 69.5 MB in the beginning and 116.6 MB in the end (delta: -47.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.06 ms. Allocated memory is still 140.5 MB. Free memory was 116.6 MB in the beginning and 115.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.54 ms. Allocated memory is still 140.5 MB. Free memory was 115.1 MB in the beginning and 114.2 MB in the end (delta: 900.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 425.79 ms. Allocated memory is still 140.5 MB. Free memory was 114.2 MB in the beginning and 104.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 123165.63 ms. Allocated memory is still 140.5 MB. Free memory was 104.0 MB in the beginning and 103.8 MB in the end (delta: 212.9 kB). Peak memory consumption was 66.9 MB. Max. memory is 16.1 GB. * Witness Printer took 94.02 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 101.7 MB in the end (delta: 2.1 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: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: 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: 123056.1ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 37.1ms, AutomataDifference: 57542.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 14673.4ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 68 SDtfs, 35 SDslu, 133 SDs, 0 SdLazy, 167 SolverSat, 31 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 14596.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 56134.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=4, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 37.1ms AutomataMinimizationTime, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 14 NumberOfFragments, 249 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 69.8ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 308 FormulaSimplificationTreeSizeReductionInter, 14597.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 58.6ms SsaConstructionTime, 944.0ms SatisfiabilityAnalysisTime, 48277.4ms InterpolantComputationTime, 73 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 712 SizeOfPredicates, 37 NumberOfNonLiveVariables, 352 ConjunctsInSsa, 98 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 11/24 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: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: ((((((((z <= 20 && a <= 20) && a * z == az) && 0 <= z) && 1 == cond) && (y == 0 || (0 == y % z && !(z == 0)))) && (a == x || (x + a * -1) % z == 0)) && 0 <= a) && a + z * x == az * y + x) || (((((((z <= 20 && a == x) && a <= 20) && a * z == az) && 0 <= z) && 1 == cond) && y == 1) && 0 <= a) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((((z <= 20 && a == x) && a <= 20) && a * z == az) && 0 <= z) && y == 1) && 0 <= a) || (((((((z <= 20 && a <= 20) && a * z == az) && 0 <= z) && 1 == cond) && z == y) && 0 <= a) && a * z + a == x)) || ((((((((z <= 20 && (y == 0 || !(z == 0))) && 1 <= cond) && a <= 20) && a * z == az) && 0 <= z) && (z == 0 || (((((x + a * -1) / z + a * -1) % z == 0 && 0 == y % z) && a + z * ((x + a * -1) / z) == (x + a * -1) / z + y / z * az) && y / z % z == 0))) && 0 <= a) && (a == x || (!(z == 0) && (x + a * -1) % z == 0))) RESULT: Ultimate proved your program to be correct! [2021-10-13 00:43:55,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b427b29-6d18-40f4-89ec-1c281ece2fbb/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...