./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF --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 079768eb2ce141267a1411f9330cb4d0cef674bf78865555f3130b47379d643a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:28:48,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:28:48,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:28:48,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:28:48,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:28:48,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:28:48,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:28:48,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:28:48,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:28:48,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:28:48,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:28:48,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:28:48,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:28:48,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:28:48,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:28:48,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:28:48,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:28:48,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:28:48,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:28:48,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:28:48,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:28:48,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:28:48,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:28:48,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:28:48,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:28:48,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:28:48,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:28:48,330 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:28:48,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:28:48,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:28:48,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:28:48,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:28:48,336 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:28:48,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:28:48,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:28:48,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:28:48,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:28:48,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:28:48,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:28:48,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:28:48,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:28:48,343 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:28:48,385 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:28:48,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:28:48,386 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:28:48,386 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:28:48,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:28:48,394 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:28:48,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:28:48,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:28:48,395 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:28:48,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:28:48,396 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:28:48,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:28:48,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:28:48,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:28:48,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:28:48,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:28:48,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:28:48,397 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:28:48,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:28:48,398 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:28:48,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:28:48,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:28:48,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:28:48,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:28:48,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:28:48,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:28:48,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:28:48,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:28:48,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:28:48,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:28:48,402 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:28:48,402 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:28:48,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:28:48,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:28:48,403 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_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 079768eb2ce141267a1411f9330cb4d0cef674bf78865555f3130b47379d643a [2021-11-20 07:28:48,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:28:48,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:28:48,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:28:48,752 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:28:48,752 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:28:48,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound1.c [2021-11-20 07:28:48,854 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/data/a2928f9fc/ecd96082bbbd4ef68b8fe1413049fd19/FLAGce732d504 [2021-11-20 07:28:49,448 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:28:49,449 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound1.c [2021-11-20 07:28:49,459 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/data/a2928f9fc/ecd96082bbbd4ef68b8fe1413049fd19/FLAGce732d504 [2021-11-20 07:28:49,806 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/data/a2928f9fc/ecd96082bbbd4ef68b8fe1413049fd19 [2021-11-20 07:28:49,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:28:49,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:28:49,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:28:49,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:28:49,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:28:49,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:28:49" (1/1) ... [2021-11-20 07:28:49,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@225cceba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:49, skipping insertion in model container [2021-11-20 07:28:49,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:28:49" (1/1) ... [2021-11-20 07:28:49,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:28:49,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:28:50,008 WARN L230 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_6107524f-166e-4615-a01a-cdedb88447db/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound1.c[576,589] [2021-11-20 07:28:50,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:28:50,032 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:28:50,044 WARN L230 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_6107524f-166e-4615-a01a-cdedb88447db/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound1.c[576,589] [2021-11-20 07:28:50,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:28:50,064 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:28:50,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:50 WrapperNode [2021-11-20 07:28:50,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:28:50,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:28:50,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:28:50,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:28:50,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:50" (1/1) ... [2021-11-20 07:28:50,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:50" (1/1) ... [2021-11-20 07:28:50,097 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2021-11-20 07:28:50,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:28:50,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:28:50,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:28:50,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:28:50,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:50" (1/1) ... [2021-11-20 07:28:50,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:50" (1/1) ... [2021-11-20 07:28:50,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:50" (1/1) ... [2021-11-20 07:28:50,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:50" (1/1) ... [2021-11-20 07:28:50,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:50" (1/1) ... [2021-11-20 07:28:50,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:50" (1/1) ... [2021-11-20 07:28:50,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:50" (1/1) ... [2021-11-20 07:28:50,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:28:50,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:28:50,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:28:50,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:28:50,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:50" (1/1) ... [2021-11-20 07:28:50,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:28:50,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:50,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:50,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:28:50,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:28:50,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:28:50,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:28:50,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:28:50,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 07:28:50,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 07:28:50,269 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:28:50,271 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:28:50,397 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:28:50,403 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:28:50,403 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 07:28:50,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:28:50 BoogieIcfgContainer [2021-11-20 07:28:50,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:28:50,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:28:50,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:28:50,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:28:50,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:28:49" (1/3) ... [2021-11-20 07:28:50,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c728b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:28:50, skipping insertion in model container [2021-11-20 07:28:50,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:50" (2/3) ... [2021-11-20 07:28:50,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c728b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:28:50, skipping insertion in model container [2021-11-20 07:28:50,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:28:50" (3/3) ... [2021-11-20 07:28:50,413 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound1.c [2021-11-20 07:28:50,419 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:28:50,420 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:28:50,471 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:28:50,478 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 [2021-11-20 07:28:50,479 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:28:50,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:28:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 07:28:50,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:50,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:50,503 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:28:50,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:50,509 INFO L85 PathProgramCache]: Analyzing trace with hash -555122024, now seen corresponding path program 1 times [2021-11-20 07:28:50,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:50,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9725076] [2021-11-20 07:28:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:50,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:28:50,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:50,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9725076] [2021-11-20 07:28:50,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9725076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:50,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:50,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:28:50,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053172532] [2021-11-20 07:28:50,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:50,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:28:50,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:50,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:28:50,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:28:50,787 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:50,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:50,811 INFO L93 Difference]: Finished difference Result 55 states and 87 transitions. [2021-11-20 07:28:50,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:28:50,813 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 07:28:50,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:50,821 INFO L225 Difference]: With dead ends: 55 [2021-11-20 07:28:50,821 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 07:28:50,826 INFO L932 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 [2021-11-20 07:28:50,835 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:50,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:28:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 07:28:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-20 07:28:50,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:28:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-11-20 07:28:50,896 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 9 [2021-11-20 07:28:50,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:50,897 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-11-20 07:28:50,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:50,897 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-11-20 07:28:50,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 07:28:50,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:50,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:50,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:28:50,900 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:28:50,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:50,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1985514477, now seen corresponding path program 1 times [2021-11-20 07:28:50,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:50,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533985270] [2021-11-20 07:28:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:50,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:28:50,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:50,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533985270] [2021-11-20 07:28:50,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533985270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:50,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:50,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:28:50,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259621226] [2021-11-20 07:28:50,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:50,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:28:50,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:50,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:28:50,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:28:50,974 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:50,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:51,003 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-11-20 07:28:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:28:51,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 07:28:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:51,005 INFO L225 Difference]: With dead ends: 34 [2021-11-20 07:28:51,005 INFO L226 Difference]: Without dead ends: 27 [2021-11-20 07:28:51,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:28:51,008 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:51,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:28:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-20 07:28:51,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-20 07:28:51,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:28:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2021-11-20 07:28:51,032 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 10 [2021-11-20 07:28:51,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:51,032 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2021-11-20 07:28:51,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2021-11-20 07:28:51,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 07:28:51,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:51,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:51,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:28:51,034 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:28:51,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:51,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1984024927, now seen corresponding path program 1 times [2021-11-20 07:28:51,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:51,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647257831] [2021-11-20 07:28:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:51,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:51,049 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:28:51,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342643012] [2021-11-20 07:28:51,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:51,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:51,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:51,052 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:51,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:28:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:51,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:28:51,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:28:51,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:28:51,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:51,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647257831] [2021-11-20 07:28:51,291 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:28:51,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342643012] [2021-11-20 07:28:51,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342643012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:51,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:51,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:28:51,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514758697] [2021-11-20 07:28:51,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:51,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:28:51,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:51,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:28:51,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:28:51,301 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:51,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:51,416 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-11-20 07:28:51,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:28:51,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 07:28:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:51,418 INFO L225 Difference]: With dead ends: 37 [2021-11-20 07:28:51,418 INFO L226 Difference]: Without dead ends: 35 [2021-11-20 07:28:51,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:28:51,420 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:51,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 117 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:28:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-20 07:28:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-11-20 07:28:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:28:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-11-20 07:28:51,431 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 10 [2021-11-20 07:28:51,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:51,432 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-11-20 07:28:51,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:51,432 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-11-20 07:28:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 07:28:51,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:51,433 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:51,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:51,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:51,659 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:28:51,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:51,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2084809189, now seen corresponding path program 1 times [2021-11-20 07:28:51,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:51,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635394177] [2021-11-20 07:28:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:51,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:51,677 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:28:51,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166012708] [2021-11-20 07:28:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:51,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:51,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:51,680 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:51,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:28:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:51,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:28:51,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:28:51,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:28:51,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:51,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635394177] [2021-11-20 07:28:51,815 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:28:51,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166012708] [2021-11-20 07:28:51,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166012708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:51,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:51,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:28:51,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005929989] [2021-11-20 07:28:51,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:51,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:28:51,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:51,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:28:51,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:28:51,818 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:28:51,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:51,880 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2021-11-20 07:28:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:28:51,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 07:28:51,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:51,882 INFO L225 Difference]: With dead ends: 50 [2021-11-20 07:28:51,883 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 07:28:51,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:28:51,885 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:51,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 117 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:28:51,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 07:28:51,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-11-20 07:28:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 07:28:51,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2021-11-20 07:28:51,910 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 15 [2021-11-20 07:28:51,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:51,910 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2021-11-20 07:28:51,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:28:51,911 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2021-11-20 07:28:51,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 07:28:51,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:51,914 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:51,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:52,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:52,118 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:28:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:52,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2002825724, now seen corresponding path program 1 times [2021-11-20 07:28:52,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:52,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851298843] [2021-11-20 07:28:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:52,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:52,130 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:28:52,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388514912] [2021-11-20 07:28:52,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:52,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:52,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:52,132 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:52,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:28:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:52,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:28:52,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:28:52,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:28:52,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:52,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851298843] [2021-11-20 07:28:52,283 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:28:52,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388514912] [2021-11-20 07:28:52,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388514912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:52,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:52,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:28:52,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974212968] [2021-11-20 07:28:52,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:52,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:28:52,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:52,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:28:52,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:28:52,292 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:28:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:52,345 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2021-11-20 07:28:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:28:52,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-11-20 07:28:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:52,349 INFO L225 Difference]: With dead ends: 67 [2021-11-20 07:28:52,352 INFO L226 Difference]: Without dead ends: 34 [2021-11-20 07:28:52,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:28:52,355 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:52,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 40 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:28:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-20 07:28:52,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-11-20 07:28:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:28:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-11-20 07:28:52,372 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2021-11-20 07:28:52,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:52,377 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-11-20 07:28:52,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:28:52,378 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-11-20 07:28:52,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 07:28:52,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:52,379 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:52,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:52,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:52,580 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:28:52,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:52,581 INFO L85 PathProgramCache]: Analyzing trace with hash -840648207, now seen corresponding path program 1 times [2021-11-20 07:28:52,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:52,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566999041] [2021-11-20 07:28:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:52,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:52,591 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:28:52,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093110439] [2021-11-20 07:28:52,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:52,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:52,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:52,598 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:52,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:28:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:52,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 07:28:52,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:28:52,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:53,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:53,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566999041] [2021-11-20 07:28:53,293 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:28:53,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093110439] [2021-11-20 07:28:53,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093110439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:53,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:28:53,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-20 07:28:53,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514025453] [2021-11-20 07:28:53,295 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:53,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:28:53,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:53,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:28:53,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2021-11-20 07:28:53,299 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:28:53,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:53,409 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-11-20 07:28:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:28:53,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-20 07:28:53,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:53,414 INFO L225 Difference]: With dead ends: 50 [2021-11-20 07:28:53,414 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 07:28:53,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=80, Unknown=1, NotChecked=0, Total=110 [2021-11-20 07:28:53,415 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:53,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 135 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:28:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 07:28:53,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-11-20 07:28:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:28:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-11-20 07:28:53,425 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 26 [2021-11-20 07:28:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:53,425 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-11-20 07:28:53,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:28:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-11-20 07:28:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 07:28:53,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:53,427 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:53,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:53,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:53,650 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:28:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:53,651 INFO L85 PathProgramCache]: Analyzing trace with hash -839158657, now seen corresponding path program 1 times [2021-11-20 07:28:53,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:53,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256531827] [2021-11-20 07:28:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:53,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:53,661 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:28:53,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937590373] [2021-11-20 07:28:53,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:53,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:53,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:53,663 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:53,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:28:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:28:53,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:28:53,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:28:53,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:53,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256531827] [2021-11-20 07:28:53,799 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:28:53,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937590373] [2021-11-20 07:28:53,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937590373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:53,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:53,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:28:53,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029588489] [2021-11-20 07:28:53,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:53,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:28:53,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:53,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:28:53,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:28:53,802 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:28:53,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:53,824 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-11-20 07:28:53,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:28:53,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-20 07:28:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:53,825 INFO L225 Difference]: With dead ends: 44 [2021-11-20 07:28:53,825 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 07:28:53,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:28:53,827 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:53,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:28:53,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 07:28:53,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 07:28:53,829 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) [2021-11-20 07:28:53,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 07:28:53,829 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-11-20 07:28:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:53,829 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 07:28:53,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:28:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 07:28:53,830 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 07:28:53,833 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 07:28:53,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:54,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:54,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-20 07:28:54,106 INFO L861 garLoopResultBuilder]: At program point L64(lines 23 65) the Hoare annotation is: true [2021-11-20 07:28:54,106 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: false [2021-11-20 07:28:54,107 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2021-11-20 07:28:54,107 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-20 07:28:54,107 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-20 07:28:54,107 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-20 07:28:54,107 INFO L858 garLoopResultBuilder]: For program point L49(lines 46 58) no Hoare annotation was computed. [2021-11-20 07:28:54,108 INFO L858 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-11-20 07:28:54,108 INFO L858 garLoopResultBuilder]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2021-11-20 07:28:54,108 INFO L854 garLoopResultBuilder]: At program point L37-3(lines 37 61) the Hoare annotation is: (or (and (<= 2 ~counter~0) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|)) (= |ULTIMATE.start_main_~q~0#1| 1)) (and (= |ULTIMATE.start_main_~b~0#1| 0) (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0) (= ~counter~0 0) (= |ULTIMATE.start_main_~a~0#1| 0))) [2021-11-20 07:28:54,108 INFO L854 garLoopResultBuilder]: At program point L37-4(lines 37 61) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|)) (<= 1 ~counter~0) (= |ULTIMATE.start_main_~q~0#1| 1)) (and (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0))) [2021-11-20 07:28:54,108 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-20 07:28:54,109 INFO L854 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: false [2021-11-20 07:28:54,109 INFO L858 garLoopResultBuilder]: For program point L54-1(line 54) no Hoare annotation was computed. [2021-11-20 07:28:54,109 INFO L858 garLoopResultBuilder]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2021-11-20 07:28:54,109 INFO L854 garLoopResultBuilder]: At program point L46-3(lines 46 58) the Hoare annotation is: (and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~a~0#1| 1) (<= 1 ~counter~0) (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0)) [2021-11-20 07:28:54,109 INFO L858 garLoopResultBuilder]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2021-11-20 07:28:54,110 INFO L854 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (and (= |ULTIMATE.start_main_~b~0#1| 0) (<= 1 ~counter~0) (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~a~0#1| 0)) [2021-11-20 07:28:54,110 INFO L854 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (and (<= 1 ~counter~0) (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0)) [2021-11-20 07:28:54,110 INFO L858 garLoopResultBuilder]: For program point L63(line 63) no Hoare annotation was computed. [2021-11-20 07:28:54,110 INFO L854 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: false [2021-11-20 07:28:54,110 INFO L854 garLoopResultBuilder]: At program point L47-1(line 47) the Hoare annotation is: false [2021-11-20 07:28:54,111 INFO L858 garLoopResultBuilder]: For program point L39(lines 37 61) no Hoare annotation was computed. [2021-11-20 07:28:54,111 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-11-20 07:28:54,111 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-11-20 07:28:54,111 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-11-20 07:28:54,111 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-11-20 07:28:54,111 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-11-20 07:28:54,112 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-20 07:28:54,115 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:54,117 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 07:28:54,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:28:54 BoogieIcfgContainer [2021-11-20 07:28:54,132 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 07:28:54,133 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 07:28:54,133 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 07:28:54,133 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 07:28:54,133 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:28:50" (3/4) ... [2021-11-20 07:28:54,136 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-20 07:28:54,143 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-20 07:28:54,147 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-20 07:28:54,148 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-20 07:28:54,148 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-20 07:28:54,148 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-20 07:28:54,184 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 07:28:54,185 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 07:28:54,185 INFO L158 Benchmark]: Toolchain (without parser) took 4375.30ms. Allocated memory was 117.4MB in the beginning and 155.2MB in the end (delta: 37.7MB). Free memory was 85.0MB in the beginning and 83.9MB in the end (delta: 1.1MB). Peak memory consumption was 37.9MB. Max. memory is 16.1GB. [2021-11-20 07:28:54,186 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 83.9MB. Free memory was 40.7MB in the beginning and 40.6MB in the end (delta: 44.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:28:54,186 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.62ms. Allocated memory is still 117.4MB. Free memory was 84.8MB in the beginning and 93.1MB in the end (delta: -8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 07:28:54,187 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.16ms. Allocated memory is still 117.4MB. Free memory was 93.1MB in the beginning and 91.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:28:54,187 INFO L158 Benchmark]: Boogie Preprocessor took 21.64ms. Allocated memory is still 117.4MB. Free memory was 91.2MB in the beginning and 90.5MB in the end (delta: 717.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:28:54,188 INFO L158 Benchmark]: RCFGBuilder took 284.53ms. Allocated memory is still 117.4MB. Free memory was 90.5MB in the beginning and 80.5MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 07:28:54,188 INFO L158 Benchmark]: TraceAbstraction took 3725.36ms. Allocated memory was 117.4MB in the beginning and 155.2MB in the end (delta: 37.7MB). Free memory was 80.0MB in the beginning and 87.3MB in the end (delta: -7.2MB). Peak memory consumption was 32.2MB. Max. memory is 16.1GB. [2021-11-20 07:28:54,189 INFO L158 Benchmark]: Witness Printer took 52.29ms. Allocated memory is still 155.2MB. Free memory was 87.3MB in the beginning and 83.9MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:28:54,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 83.9MB. Free memory was 40.7MB in the beginning and 40.6MB in the end (delta: 44.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 251.62ms. Allocated memory is still 117.4MB. Free memory was 84.8MB in the beginning and 93.1MB in the end (delta: -8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.16ms. Allocated memory is still 117.4MB. Free memory was 93.1MB in the beginning and 91.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.64ms. Allocated memory is still 117.4MB. Free memory was 91.2MB in the beginning and 90.5MB in the end (delta: 717.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 284.53ms. Allocated memory is still 117.4MB. Free memory was 90.5MB in the beginning and 80.5MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 3725.36ms. Allocated memory was 117.4MB in the beginning and 155.2MB in the end (delta: 37.7MB). Free memory was 80.0MB in the beginning and 87.3MB in the end (delta: -7.2MB). Peak memory consumption was 32.2MB. Max. memory is 16.1GB. * Witness Printer took 52.29ms. Allocated memory is still 155.2MB. Free memory was 87.3MB in the beginning and 83.9MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.6s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 52 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 43 mSDsluCounter, 589 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 389 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 159 IncrementalHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 200 mSDtfsCounter, 159 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=4, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 9 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 38 PreInvPairs, 46 NumberOfFragments, 97 HoareAnnotationTreeSize, 38 FomulaSimplifications, 17 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 119 NumberOfCodeBlocks, 119 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 312 SizeOfPredicates, 6 NumberOfNonLiveVariables, 401 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 7 InterpolantComputations, 6 PerfectInterpolantSequences, 29/31 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 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((b == y && a == 1) && 1 <= counter) && r == x) && q == 0 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((2 <= counter && x == r + y) && q == 1) || ((((b == 0 && r == x) && q == 0) && counter == 0) && a == 0) RESULT: Ultimate proved your program to be correct! [2021-11-20 07:28:54,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6107524f-166e-4615-a01a-cdedb88447db/bin/uautomizer-DQz5hQGWxF/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