./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/geo3-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/geo3-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY --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 e93016ff57c45c3cae283be4b49e01d237dbbda4f83cf7a9bfcfac37d4c97276 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:26:51,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:26:51,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:26:51,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:26:51,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:26:51,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:26:51,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:26:51,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:26:51,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:26:51,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:26:51,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:26:51,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:26:51,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:26:51,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:26:51,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:26:51,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:26:51,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:26:51,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:26:51,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:26:51,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:26:51,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:26:51,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:26:51,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:26:51,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:26:51,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:26:51,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:26:51,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:26:51,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:26:51,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:26:51,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:26:51,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:26:51,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:26:51,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:26:51,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:26:51,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:26:51,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:26:51,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:26:51,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:26:51,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:26:51,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:26:51,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:26:51,355 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:26:51,393 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:26:51,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:26:51,394 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:26:51,395 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:26:51,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:26:51,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:26:51,397 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:26:51,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:26:51,398 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:26:51,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:26:51,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:26:51,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:26:51,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:26:51,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:26:51,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:26:51,400 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:26:51,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:26:51,401 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:26:51,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:26:51,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:26:51,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:26:51,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:26:51,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:26:51,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:26:51,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:26:51,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:26:51,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:26:51,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:26:51,403 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:26:51,405 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:26:51,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:26:51,405 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:26:51,406 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_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e93016ff57c45c3cae283be4b49e01d237dbbda4f83cf7a9bfcfac37d4c97276 [2021-11-07 07:26:51,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:26:51,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:26:51,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:26:51,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:26:51,745 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:26:51,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/nla-digbench-scaling/geo3-ll_valuebound5.c [2021-11-07 07:26:51,835 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/data/011bf9aa9/3c6864a3262e42c8855a81b7f6db3b53/FLAG9393d7fa9 [2021-11-07 07:26:52,299 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:26:52,300 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/sv-benchmarks/c/nla-digbench-scaling/geo3-ll_valuebound5.c [2021-11-07 07:26:52,313 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/data/011bf9aa9/3c6864a3262e42c8855a81b7f6db3b53/FLAG9393d7fa9 [2021-11-07 07:26:52,689 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/data/011bf9aa9/3c6864a3262e42c8855a81b7f6db3b53 [2021-11-07 07:26:52,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:26:52,693 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:26:52,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:26:52,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:26:52,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:26:52,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:26:52" (1/1) ... [2021-11-07 07:26:52,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cc46e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:52, skipping insertion in model container [2021-11-07 07:26:52,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:26:52" (1/1) ... [2021-11-07 07:26:52,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:26:52,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:26:52,906 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_e4a28e3c-d696-45c6-988f-5b0f813dd473/sv-benchmarks/c/nla-digbench-scaling/geo3-ll_valuebound5.c[525,538] [2021-11-07 07:26:52,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:26:52,932 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:26:52,944 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_e4a28e3c-d696-45c6-988f-5b0f813dd473/sv-benchmarks/c/nla-digbench-scaling/geo3-ll_valuebound5.c[525,538] [2021-11-07 07:26:52,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:26:52,972 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:26:52,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:52 WrapperNode [2021-11-07 07:26:52,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:26:52,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:26:52,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:26:52,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:26:52,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:52" (1/1) ... [2021-11-07 07:26:53,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:52" (1/1) ... [2021-11-07 07:26:53,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:26:53,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:26:53,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:26:53,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:26:53,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:52" (1/1) ... [2021-11-07 07:26:53,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:52" (1/1) ... [2021-11-07 07:26:53,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:52" (1/1) ... [2021-11-07 07:26:53,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:52" (1/1) ... [2021-11-07 07:26:53,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:52" (1/1) ... [2021-11-07 07:26:53,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:52" (1/1) ... [2021-11-07 07:26:53,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:52" (1/1) ... [2021-11-07 07:26:53,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:26:53,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:26:53,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:26:53,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:26:53,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:52" (1/1) ... [2021-11-07 07:26:53,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:26:53,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:26:53,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:26:53,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:26:53,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:26:53,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:26:53,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:26:53,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:26:53,554 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:26:53,555 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-07 07:26:53,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:26:53 BoogieIcfgContainer [2021-11-07 07:26:53,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:26:53,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:26:53,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:26:53,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:26:53,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:26:52" (1/3) ... [2021-11-07 07:26:53,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29566dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:26:53, skipping insertion in model container [2021-11-07 07:26:53,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:52" (2/3) ... [2021-11-07 07:26:53,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29566dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:26:53, skipping insertion in model container [2021-11-07 07:26:53,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:26:53" (3/3) ... [2021-11-07 07:26:53,590 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_valuebound5.c [2021-11-07 07:26:53,596 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:26:53,596 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 07:26:53,652 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:26:53,660 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:26:53,661 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 07:26:53,678 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) [2021-11-07 07:26:53,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 07:26:53,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:26:53,684 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:26:53,685 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:26:53,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:26:53,691 INFO L85 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2021-11-07 07:26:53,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:26:53,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252493394] [2021-11-07 07:26:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:53,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:26:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:26:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:53,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:26:53,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252493394] [2021-11-07 07:26:53,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252493394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:26:53,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:26:53,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:26:53,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427275184] [2021-11-07 07:26:53,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:26:53,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:26:53,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:26:53,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:26:53,946 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) [2021-11-07 07:26:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:26:53,965 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-11-07 07:26:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:26:53,966 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 [2021-11-07 07:26:53,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:26:53,991 INFO L225 Difference]: With dead ends: 39 [2021-11-07 07:26:53,991 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 07:26:53,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:26:54,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 07:26:54,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-07 07:26:54,041 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) [2021-11-07 07:26:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-11-07 07:26:54,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2021-11-07 07:26:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:26:54,048 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-11-07 07:26:54,048 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) [2021-11-07 07:26:54,048 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-11-07 07:26:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 07:26:54,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:26:54,050 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:26:54,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:26:54,051 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:26:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:26:54,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2021-11-07 07:26:54,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:26:54,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473868539] [2021-11-07 07:26:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:54,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:26:54,088 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:26:54,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967001226] [2021-11-07 07:26:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:54,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:26:54,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:26:54,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:26:54,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:26:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:26:54,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:26:54,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:26:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:54,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:26:54,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473868539] [2021-11-07 07:26:54,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:26:54,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967001226] [2021-11-07 07:26:54,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967001226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:26:54,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:26:54,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:26:54,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800772225] [2021-11-07 07:26:54,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:26:54,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:26:54,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:26:54,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:26:54,391 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) [2021-11-07 07:26:54,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:26:54,471 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-11-07 07:26:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:26:54,472 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 [2021-11-07 07:26:54,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:26:54,473 INFO L225 Difference]: With dead ends: 27 [2021-11-07 07:26:54,473 INFO L226 Difference]: Without dead ends: 21 [2021-11-07 07:26:54,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:26:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-07 07:26:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-11-07 07:26:54,479 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) [2021-11-07 07:26:54,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-11-07 07:26:54,480 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2021-11-07 07:26:54,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:26:54,480 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-11-07 07:26:54,481 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) [2021-11-07 07:26:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-11-07 07:26:54,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 07:26:54,482 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:26:54,482 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:26:54,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:26:54,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:26:54,711 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:26:54,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:26:54,712 INFO L85 PathProgramCache]: Analyzing trace with hash -937492348, now seen corresponding path program 1 times [2021-11-07 07:26:54,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:26:54,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850732738] [2021-11-07 07:26:54,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:54,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:26:54,737 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:26:54,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212221181] [2021-11-07 07:26:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:54,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:26:54,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:26:54,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:26:54,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:26:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:26:54,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:26:54,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:26:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:55,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:26:55,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850732738] [2021-11-07 07:26:55,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:26:55,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212221181] [2021-11-07 07:26:55,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212221181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:26:55,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:26:55,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-07 07:26:55,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092447146] [2021-11-07 07:26:55,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:26:55,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:26:55,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:26:55,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:26:55,032 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-11-07 07:26:55,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:26:55,132 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-11-07 07:26:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:26:55,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 [2021-11-07 07:26:55,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:26:55,134 INFO L225 Difference]: With dead ends: 30 [2021-11-07 07:26:55,134 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 07:26:55,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:26:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 07:26:55,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-07 07:26:55,140 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) [2021-11-07 07:26:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-11-07 07:26:55,141 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14 [2021-11-07 07:26:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:26:55,141 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-11-07 07:26:55,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-11-07 07:26:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-11-07 07:26:55,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 07:26:55,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:26:55,143 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:26:55,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:26:55,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:26:55,371 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:26:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:26:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1342734009, now seen corresponding path program 2 times [2021-11-07 07:26:55,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:26:55,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575171898] [2021-11-07 07:26:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:55,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:26:55,396 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:26:55,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685925051] [2021-11-07 07:26:55,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:26:55,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:26:55,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:26:55,398 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:26:55,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:26:55,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:26:55,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:26:55,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 07:26:55,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:26:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:56,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:26:56,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575171898] [2021-11-07 07:26:56,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:26:56,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685925051] [2021-11-07 07:26:56,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685925051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:26:56,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:26:56,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 07:26:56,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457955046] [2021-11-07 07:26:56,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:26:56,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:26:56,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:26:56,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:26:56,114 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:26:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:26:56,379 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-11-07 07:26:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:26:56,381 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 [2021-11-07 07:26:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:26:56,382 INFO L225 Difference]: With dead ends: 33 [2021-11-07 07:26:56,382 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 07:26:56,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:26:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 07:26:56,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-11-07 07:26:56,387 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) [2021-11-07 07:26:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-11-07 07:26:56,399 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2021-11-07 07:26:56,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:26:56,399 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-11-07 07:26:56,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:26:56,401 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-11-07 07:26:56,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 07:26:56,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:26:56,401 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:26:56,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:26:56,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-07 07:26:56,619 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:26:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:26:56,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1931585436, now seen corresponding path program 3 times [2021-11-07 07:26:56,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:26:56,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363377310] [2021-11-07 07:26:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:56,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:26:56,639 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:26:56,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146845686] [2021-11-07 07:26:56,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:26:56,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:26:56,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:26:56,641 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:26:56,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:26:57,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 07:26:57,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:26:57,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 07:26:57,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:27:14,798 WARN L207 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-07 07:28:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:28:04,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:28:04,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363377310] [2021-11-07 07:28:04,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:28:04,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146845686] [2021-11-07 07:28:04,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146845686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:28:04,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:28:04,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-07 07:28:04,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979475585] [2021-11-07 07:28:04,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:28:04,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:28:04,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:28:04,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:28:04,946 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) 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) [2021-11-07 07:28:19,166 WARN L207 SmtUtils]: Spent 14.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-11-07 07:28:47,014 WARN L207 SmtUtils]: Spent 19.16 s on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-11-07 07:28:51,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:28:51,086 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-11-07 07:28:51,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:28:51,087 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) 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 [2021-11-07 07:28:51,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:28:51,088 INFO L225 Difference]: With dead ends: 26 [2021-11-07 07:28:51,088 INFO L226 Difference]: Without dead ends: 0 [2021-11-07 07:28:51,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 48.5s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:28:51,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-07 07:28:51,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-07 07:28:51,089 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) [2021-11-07 07:28:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-07 07:28:51,090 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-11-07 07:28:51,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:28:51,090 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 07:28:51,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) 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) [2021-11-07 07:28:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-07 07:28:51,091 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-07 07:28:51,093 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 07:28:51,094 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 07:28:51,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:28:51,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:28:51,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-07 07:28:51,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 07:28:51,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 07:28:51,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 07:28:51,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 07:29:05,408 WARN L207 SmtUtils]: Spent 14.03 s on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-11-07 07:29:12,963 WARN L207 SmtUtils]: Spent 7.55 s on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-11-07 07:29:12,965 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-07 07:29:12,966 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-11-07 07:29:12,966 INFO L853 garLoopResultBuilder]: At program point L15-2(lines 39 40) the Hoare annotation is: (let ((.cse0 (= (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~z~0) ULTIMATE.start_main_~az~0)) (.cse1 (<= 0 ULTIMATE.start_main_~z~0)) (.cse2 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse3 (<= ULTIMATE.start_main_~z~0 5)) (.cse4 (<= ULTIMATE.start_main_~a~0 5)) (.cse5 (<= 0 ULTIMATE.start_main_~a~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)))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~y~0 1) .cse3 .cse4 .cse5 .cse6) (let ((.cse8 (* ULTIMATE.start_main_~a~0 (- 1)))) (let ((.cse7 (+ ULTIMATE.start_main_~x~0 .cse8))) (and (or (= ULTIMATE.start_main_~y~0 0) (and (= (mod (+ (div .cse7 ULTIMATE.start_main_~z~0) .cse8) ULTIMATE.start_main_~z~0) 0) (= 0 (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) (not (= ULTIMATE.start_main_~z~0 0)))) .cse0 .cse1 .cse2 .cse3 (or (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0) (= (mod .cse7 ULTIMATE.start_main_~z~0) 0)) .cse4 .cse5 .cse6))))) [2021-11-07 07:29:12,966 INFO L857 garLoopResultBuilder]: For program point L15-3(lines 15 18) no Hoare annotation was computed. [2021-11-07 07:29:12,966 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2021-11-07 07:29:12,966 INFO L857 garLoopResultBuilder]: For program point L11-1(lines 11 13) no Hoare annotation was computed. [2021-11-07 07:29:12,966 INFO L860 garLoopResultBuilder]: At program point L15-5(lines 14 20) the Hoare annotation is: true [2021-11-07 07:29:12,967 INFO L857 garLoopResultBuilder]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2021-11-07 07:29:12,967 INFO L853 garLoopResultBuilder]: At program point L36-2(lines 36 45) the Hoare annotation is: (let ((.cse5 (= (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~z~0) ULTIMATE.start_main_~az~0)) (.cse6 (<= 0 ULTIMATE.start_main_~z~0)) (.cse7 (<= ULTIMATE.start_main_~z~0 5)) (.cse8 (<= ULTIMATE.start_main_~a~0 5)) (.cse9 (<= 0 ULTIMATE.start_main_~a~0))) (or (let ((.cse1 (* ULTIMATE.start_main_~a~0 (- 1))) (.cse4 (= ULTIMATE.start_main_~z~0 0))) (let ((.cse2 (not .cse4)) (.cse3 (+ ULTIMATE.start_main_~x~0 .cse1))) (and (or (let ((.cse0 (div .cse3 ULTIMATE.start_main_~z~0))) (and (= (mod (+ .cse0 .cse1) ULTIMATE.start_main_~z~0) 0) (= 0 (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) .cse2 (= (+ ULTIMATE.start_main_~a~0 (* ULTIMATE.start_main_~z~0 .cse0)) (+ .cse0 (* (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) ULTIMATE.start_main_~az~0))))) (and .cse4 (= ULTIMATE.start_main_~y~0 0))) .cse5 .cse6 .cse7 .cse8 .cse9 (or (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0) (and .cse2 (= (mod .cse3 ULTIMATE.start_main_~z~0) 0)))))) (and .cse5 .cse6 (= ULTIMATE.start_main_~y~0 1) .cse7 .cse8 .cse9 (= (+ 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))))) [2021-11-07 07:29:12,967 INFO L857 garLoopResultBuilder]: For program point L36-3(lines 36 45) no Hoare annotation was computed. [2021-11-07 07:29:12,967 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-07 07:29:12,967 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-07 07:29:12,967 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-07 07:29:12,967 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-07 07:29:12,967 INFO L857 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-11-07 07:29:12,967 INFO L857 garLoopResultBuilder]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2021-11-07 07:29:12,968 INFO L857 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-11-07 07:29:12,968 INFO L857 garLoopResultBuilder]: For program point L12-2(line 12) no Hoare annotation was computed. [2021-11-07 07:29:12,968 INFO L857 garLoopResultBuilder]: For program point L12-4(line 12) no Hoare annotation was computed. [2021-11-07 07:29:12,968 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-07 07:29:12,968 INFO L860 garLoopResultBuilder]: At program point L47(lines 21 48) the Hoare annotation is: true [2021-11-07 07:29:12,970 INFO L731 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2021-11-07 07:29:12,972 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 07:29:12,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:29:12 BoogieIcfgContainer [2021-11-07 07:29:12,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 07:29:12,992 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 07:29:12,992 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 07:29:12,992 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 07:29:12,992 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:26:53" (3/4) ... [2021-11-07 07:29:12,995 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-07 07:29:13,005 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-07 07:29:13,005 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-07 07:29:13,005 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 07:29:13,005 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 07:29:13,054 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/witness.graphml [2021-11-07 07:29:13,054 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 07:29:13,056 INFO L168 Benchmark]: Toolchain (without parser) took 140362.10 ms. Allocated memory was 79.7 MB in the beginning and 132.1 MB in the end (delta: 52.4 MB). Free memory was 43.6 MB in the beginning and 78.2 MB in the end (delta: -34.6 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. [2021-11-07 07:29:13,056 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 79.7 MB. Free memory was 60.1 MB in the beginning and 60.1 MB in the end (delta: 70.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:29:13,057 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.73 ms. Allocated memory was 79.7 MB in the beginning and 109.1 MB in the end (delta: 29.4 MB). Free memory was 43.5 MB in the beginning and 85.5 MB in the end (delta: -42.0 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2021-11-07 07:29:13,058 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.33 ms. Allocated memory is still 109.1 MB. Free memory was 85.5 MB in the beginning and 83.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 07:29:13,058 INFO L168 Benchmark]: Boogie Preprocessor took 70.19 ms. Allocated memory is still 109.1 MB. Free memory was 83.8 MB in the beginning and 82.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 07:29:13,059 INFO L168 Benchmark]: RCFGBuilder took 446.32 ms. Allocated memory is still 109.1 MB. Free memory was 82.7 MB in the beginning and 73.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 07:29:13,059 INFO L168 Benchmark]: TraceAbstraction took 139431.33 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 72.5 MB in the beginning and 81.4 MB in the end (delta: -8.9 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2021-11-07 07:29:13,060 INFO L168 Benchmark]: Witness Printer took 63.11 ms. Allocated memory is still 132.1 MB. Free memory was 81.4 MB in the beginning and 78.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 07:29:13,063 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 79.7 MB. Free memory was 60.1 MB in the beginning and 60.1 MB in the end (delta: 70.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 277.73 ms. Allocated memory was 79.7 MB in the beginning and 109.1 MB in the end (delta: 29.4 MB). Free memory was 43.5 MB in the beginning and 85.5 MB in the end (delta: -42.0 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.33 ms. Allocated memory is still 109.1 MB. Free memory was 85.5 MB in the beginning and 83.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.19 ms. Allocated memory is still 109.1 MB. Free memory was 83.8 MB in the beginning and 82.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 446.32 ms. Allocated memory is still 109.1 MB. Free memory was 82.7 MB in the beginning and 73.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 139431.33 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 72.5 MB in the beginning and 81.4 MB in the end (delta: -8.9 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. * Witness Printer took 63.11 ms. Allocated memory is still 132.1 MB. Free memory was 81.4 MB in the beginning and 78.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 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: 139.3s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 46.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 21.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 67 SDtfs, 32 SDslu, 122 SDs, 0 SdLazy, 146 SolverSat, 31 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 8.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 48.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=4, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 14 NumberOfFragments, 239 HoareAnnotationTreeSize, 4 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 409 FormulaSimplificationTreeSizeReductionInter, 21.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 68.4s InterpolantComputationTime, 73 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 657 SizeOfPredicates, 35 NumberOfNonLiveVariables, 352 ConjunctsInSsa, 88 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: (((((((a * z == az && 0 <= z) && 1 == cond) && y == 1) && z <= 5) && a <= 5) && 0 <= a) && a + z * x == az * y + x) || (((((((((y == 0 || ((((x + a * -1) / z + a * -1) % z == 0 && 0 == y % z) && !(z == 0))) && a * z == az) && 0 <= z) && 1 == cond) && z <= 5) && (a == x || (x + a * -1) % z == 0)) && a <= 5) && 0 <= a) && a + z * x == az * y + x) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((((((((x + a * -1) / z + a * -1) % z == 0 && 0 == y % z) && !(z == 0)) && a + z * ((x + a * -1) / z) == (x + a * -1) / z + y / z * az) || (z == 0 && y == 0)) && a * z == az) && 0 <= z) && z <= 5) && a <= 5) && 0 <= a) && (a == x || (!(z == 0) && (x + a * -1) % z == 0))) || ((((((a * z == az && 0 <= z) && y == 1) && z <= 5) && a <= 5) && 0 <= a) && a + z * x == az * y + x) RESULT: Ultimate proved your program to be correct! [2021-11-07 07:29:13,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a28e3c-d696-45c6-988f-5b0f813dd473/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE