./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G --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 7e073a4c36b82f2b6062e496bb836cd3d16667ec7228f4ab2b6689e74fa81265 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:09:22,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:09:22,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:09:22,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:09:22,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:09:22,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:09:22,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:09:22,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:09:22,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:09:22,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:09:22,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:09:22,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:09:22,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:09:22,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:09:22,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:09:22,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:09:22,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:09:22,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:09:22,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:09:22,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:09:22,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:09:22,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:09:22,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:09:22,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:09:22,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:09:22,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:09:22,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:09:22,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:09:22,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:09:22,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:09:22,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:09:22,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:09:22,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:09:22,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:09:22,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:09:22,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:09:22,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:09:22,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:09:22,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:09:22,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:09:22,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:09:22,902 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:09:22,953 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:09:22,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:09:22,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:09:22,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:09:22,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:09:22,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:09:22,964 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:09:22,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:09:22,964 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:09:22,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:09:22,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:09:22,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:09:22,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:09:22,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:09:22,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:09:22,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:09:22,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:09:22,967 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:09:22,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:09:22,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:09:22,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:09:22,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:09:22,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:09:22,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:09:22,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:09:22,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:09:22,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:09:22,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:09:22,970 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:09:22,972 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:09:22,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:09:22,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:09:22,973 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_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e073a4c36b82f2b6062e496bb836cd3d16667ec7228f4ab2b6689e74fa81265 [2021-11-23 13:09:23,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:09:23,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:09:23,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:09:23,300 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:09:23,301 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:09:23,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2021-11-23 13:09:23,380 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/data/61d30b63f/b02232f053b34a899ca66e902d0612db/FLAGfb6b59df3 [2021-11-23 13:09:23,868 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:09:23,869 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2021-11-23 13:09:23,889 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/data/61d30b63f/b02232f053b34a899ca66e902d0612db/FLAGfb6b59df3 [2021-11-23 13:09:24,234 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/data/61d30b63f/b02232f053b34a899ca66e902d0612db [2021-11-23 13:09:24,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:09:24,238 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:09:24,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:09:24,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:09:24,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:09:24,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:09:24" (1/1) ... [2021-11-23 13:09:24,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70850278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:24, skipping insertion in model container [2021-11-23 13:09:24,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:09:24" (1/1) ... [2021-11-23 13:09:24,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:09:24,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:09:24,456 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_55f7ea51-5058-46af-ba34-8163d1277098/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i[950,963] [2021-11-23 13:09:24,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:09:24,481 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:09:24,494 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_55f7ea51-5058-46af-ba34-8163d1277098/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i[950,963] [2021-11-23 13:09:24,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:09:24,515 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:09:24,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:24 WrapperNode [2021-11-23 13:09:24,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:09:24,517 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:09:24,517 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:09:24,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:09:24,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:24" (1/1) ... [2021-11-23 13:09:24,532 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:24" (1/1) ... [2021-11-23 13:09:24,553 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 70 [2021-11-23 13:09:24,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:09:24,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:09:24,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:09:24,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:09:24,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:24" (1/1) ... [2021-11-23 13:09:24,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:24" (1/1) ... [2021-11-23 13:09:24,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:24" (1/1) ... [2021-11-23 13:09:24,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:24" (1/1) ... [2021-11-23 13:09:24,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:24" (1/1) ... [2021-11-23 13:09:24,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:24" (1/1) ... [2021-11-23 13:09:24,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:24" (1/1) ... [2021-11-23 13:09:24,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:09:24,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:09:24,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:09:24,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:09:24,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:24" (1/1) ... [2021-11-23 13:09:24,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:09:24,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:09:24,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:09:24,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:09:24,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:09:24,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:09:24,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:09:24,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:09:24,716 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:09:24,717 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:09:24,840 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:09:24,847 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:09:24,847 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 13:09:24,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:09:24 BoogieIcfgContainer [2021-11-23 13:09:24,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:09:24,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:09:24,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:09:24,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:09:24,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:09:24" (1/3) ... [2021-11-23 13:09:24,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41db88c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:09:24, skipping insertion in model container [2021-11-23 13:09:24,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:24" (2/3) ... [2021-11-23 13:09:24,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41db88c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:09:24, skipping insertion in model container [2021-11-23 13:09:24,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:09:24" (3/3) ... [2021-11-23 13:09:24,859 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound20.i [2021-11-23 13:09:24,865 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:09:24,865 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 13:09:24,921 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:09:24,927 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 [2021-11-23 13:09:24,927 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 13:09:24,939 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 24 states have internal predecessors, (35), 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) [2021-11-23 13:09:24,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:09:24,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:24,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:24,946 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:24,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:24,952 INFO L85 PathProgramCache]: Analyzing trace with hash 344858618, now seen corresponding path program 1 times [2021-11-23 13:09:24,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:24,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103753726] [2021-11-23 13:09:24,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:24,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:25,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:25,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103753726] [2021-11-23 13:09:25,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103753726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:25,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:25,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:09:25,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149083136] [2021-11-23 13:09:25,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:25,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:09:25,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:25,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:09:25,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:09:25,152 INFO L87 Difference]: Start difference. First operand has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:25,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:25,181 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2021-11-23 13:09:25,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:09:25,184 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 13:09:25,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:25,196 INFO L225 Difference]: With dead ends: 47 [2021-11-23 13:09:25,197 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 13:09:25,201 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 [2021-11-23 13:09:25,207 INFO L933 BasicCegarLoop]: 29 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, 29 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 [2021-11-23 13:09:25,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:09:25,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 13:09:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 13:09:25,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 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) [2021-11-23 13:09:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-23 13:09:25,253 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2021-11-23 13:09:25,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:25,254 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-23 13:09:25,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-23 13:09:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 13:09:25,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:25,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:25,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:09:25,258 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:25,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:25,262 INFO L85 PathProgramCache]: Analyzing trace with hash 514095505, now seen corresponding path program 1 times [2021-11-23 13:09:25,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:25,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140480387] [2021-11-23 13:09:25,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:25,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:25,312 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:09:25,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988141739] [2021-11-23 13:09:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:25,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:09:25,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:09:25,316 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:09:25,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:09:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:25,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:09:25,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:09:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:25,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:09:25,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:25,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140480387] [2021-11-23 13:09:25,567 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:09:25,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988141739] [2021-11-23 13:09:25,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988141739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:25,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:25,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:09:25,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765599086] [2021-11-23 13:09:25,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:25,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:09:25,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:25,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:09:25,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:09:25,577 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-23 13:09:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:25,607 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-11-23 13:09:25,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:09:25,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 13:09:25,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:25,609 INFO L225 Difference]: With dead ends: 35 [2021-11-23 13:09:25,610 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 13:09:25,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:09:25,613 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 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 [2021-11-23 13:09:25,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:09:25,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 13:09:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-23 13:09:25,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-23 13:09:25,629 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-23 13:09:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:25,629 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-23 13:09:25,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-23 13:09:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-23 13:09:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 13:09:25,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:25,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:25,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:09:25,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:09:25,837 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:25,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:25,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1194113768, now seen corresponding path program 1 times [2021-11-23 13:09:25,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:25,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479529969] [2021-11-23 13:09:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:25,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:25,860 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:09:25,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117643748] [2021-11-23 13:09:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:25,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:09:25,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:09:25,866 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:09:25,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:09:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:25,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 13:09:25,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:09:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:26,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:09:26,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:26,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479529969] [2021-11-23 13:09:26,358 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:09:26,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117643748] [2021-11-23 13:09:26,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117643748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:26,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:26,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 13:09:26,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62583431] [2021-11-23 13:09:26,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:26,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:09:26,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:26,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:09:26,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:09:26,363 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2021-11-23 13:09:26,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:26,640 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-11-23 13:09:26,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:09:26,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 13:09:26,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:26,644 INFO L225 Difference]: With dead ends: 42 [2021-11-23 13:09:26,644 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 13:09:26,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:09:26,646 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:26,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 72 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:09:26,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 13:09:26,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-11-23 13:09:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 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) [2021-11-23 13:09:26,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-23 13:09:26,652 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 13 [2021-11-23 13:09:26,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:26,653 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-23 13:09:26,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2021-11-23 13:09:26,656 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-23 13:09:26,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 13:09:26,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:26,657 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:26,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:09:26,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:09:26,862 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:26,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:26,863 INFO L85 PathProgramCache]: Analyzing trace with hash 483460221, now seen corresponding path program 1 times [2021-11-23 13:09:26,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:26,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671333732] [2021-11-23 13:09:26,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:26,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:26,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:09:26,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844859680] [2021-11-23 13:09:26,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:26,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:09:26,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:09:26,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:09:26,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:09:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:26,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:09:26,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:09:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:26,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:09:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:27,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:27,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671333732] [2021-11-23 13:09:27,051 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:09:27,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844859680] [2021-11-23 13:09:27,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844859680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:09:27,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:09:27,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-23 13:09:27,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920168859] [2021-11-23 13:09:27,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:09:27,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:09:27,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:27,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:09:27,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:09:27,054 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:27,125 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2021-11-23 13:09:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:09:27,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 13:09:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:27,130 INFO L225 Difference]: With dead ends: 76 [2021-11-23 13:09:27,130 INFO L226 Difference]: Without dead ends: 64 [2021-11-23 13:09:27,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:09:27,136 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:27,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 91 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:09:27,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-23 13:09:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 38. [2021-11-23 13:09:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 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) [2021-11-23 13:09:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-23 13:09:27,148 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 15 [2021-11-23 13:09:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:27,149 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-23 13:09:27,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-23 13:09:27,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 13:09:27,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:27,150 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:27,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:09:27,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:09:27,354 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:27,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2143807572, now seen corresponding path program 1 times [2021-11-23 13:09:27,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:27,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871441683] [2021-11-23 13:09:27,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:27,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:27,369 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:09:27,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673022000] [2021-11-23 13:09:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:27,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:09:27,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:09:27,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:09:27,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:09:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:27,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 13:09:27,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:09:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:27,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:09:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:30,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:30,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871441683] [2021-11-23 13:09:30,577 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:09:30,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673022000] [2021-11-23 13:09:30,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673022000] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 13:09:30,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:09:30,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2021-11-23 13:09:30,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067282152] [2021-11-23 13:09:30,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:30,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:09:30,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:30,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:09:30,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:09:30,580 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-11-23 13:09:34,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:34,442 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-11-23 13:09:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:09:34,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 13:09:34,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:34,444 INFO L225 Difference]: With dead ends: 57 [2021-11-23 13:09:34,444 INFO L226 Difference]: Without dead ends: 50 [2021-11-23 13:09:34,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:09:34,446 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:34,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 92 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 21 Unchecked, 0.4s Time] [2021-11-23 13:09:34,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-23 13:09:34,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2021-11-23 13:09:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 42 states have internal predecessors, (51), 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) [2021-11-23 13:09:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-11-23 13:09:34,454 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 16 [2021-11-23 13:09:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:34,454 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-11-23 13:09:34,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-11-23 13:09:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-11-23 13:09:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 13:09:34,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:34,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:34,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 13:09:34,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:09:34,673 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:34,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:34,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1058398755, now seen corresponding path program 1 times [2021-11-23 13:09:34,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:34,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516389767] [2021-11-23 13:09:34,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:34,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:34,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:09:34,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469998170] [2021-11-23 13:09:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:34,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:09:34,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:09:34,714 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:09:34,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:09:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:34,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:09:34,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:09:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:34,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:09:34,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:34,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516389767] [2021-11-23 13:09:34,831 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:09:34,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469998170] [2021-11-23 13:09:34,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469998170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:34,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:34,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:09:34,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492720920] [2021-11-23 13:09:34,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:34,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:09:34,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:34,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:09:34,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:09:34,833 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:34,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:34,864 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2021-11-23 13:09:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:09:34,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 13:09:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:34,867 INFO L225 Difference]: With dead ends: 60 [2021-11-23 13:09:34,868 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 13:09:34,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:09:34,873 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:34,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:09:34,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 13:09:34,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-23 13:09:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 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) [2021-11-23 13:09:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-11-23 13:09:34,891 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 19 [2021-11-23 13:09:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:34,892 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-11-23 13:09:34,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-11-23 13:09:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 13:09:34,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:34,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:34,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:09:35,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:09:35,118 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:35,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:35,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1565238457, now seen corresponding path program 1 times [2021-11-23 13:09:35,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:35,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955884238] [2021-11-23 13:09:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:35,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:35,134 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:09:35,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077027521] [2021-11-23 13:09:35,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:35,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:09:35,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:09:35,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:09:35,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55f7ea51-5058-46af-ba34-8163d1277098/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process