./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa --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 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:34:57,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:34:57,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:34:57,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:34:57,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:34:57,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:34:57,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:34:57,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:34:57,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:34:57,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:34:57,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:34:57,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:34:57,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:34:57,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:34:57,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:34:57,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:34:57,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:34:57,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:34:57,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:34:57,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:34:57,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:34:57,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:34:57,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:34:57,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:34:57,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:34:57,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:34:57,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:34:57,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:34:57,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:34:57,222 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:34:57,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:34:57,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:34:57,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:34:57,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:34:57,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:34:57,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:34:57,226 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:34:57,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:34:57,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:34:57,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:34:57,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:34:57,228 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:34:57,245 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:34:57,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:34:57,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:34:57,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:34:57,246 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:34:57,246 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:34:57,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:34:57,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:34:57,246 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:34:57,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:34:57,247 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:34:57,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:34:57,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:34:57,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:34:57,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:34:57,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:34:57,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:34:57,247 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:34:57,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:34:57,248 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:34:57,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:34:57,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:34:57,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:34:57,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:34:57,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:34:57,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:34:57,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:34:57,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:34:57,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:34:57,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:34:57,249 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:34:57,249 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:34:57,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:34:57,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:34:57,249 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_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 [2021-12-06 22:34:57,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:34:57,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:34:57,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:34:57,461 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:34:57,461 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:34:57,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2021-12-06 22:34:57,505 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/data/9d199e5e8/cd10aca30a1d41d3bf0760cd5c3a4775/FLAG46f27ddab [2021-12-06 22:34:57,866 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:34:57,866 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2021-12-06 22:34:57,871 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/data/9d199e5e8/cd10aca30a1d41d3bf0760cd5c3a4775/FLAG46f27ddab [2021-12-06 22:34:57,880 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/data/9d199e5e8/cd10aca30a1d41d3bf0760cd5c3a4775 [2021-12-06 22:34:57,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:34:57,883 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:34:57,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:34:57,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:34:57,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:34:57,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:34:57" (1/1) ... [2021-12-06 22:34:57,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7650fc6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:34:57, skipping insertion in model container [2021-12-06 22:34:57,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:34:57" (1/1) ... [2021-12-06 22:34:57,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:34:57,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:34:58,032 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_e1bbdd95-9e56-4248-9012-754eab9ee170/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i[950,963] [2021-12-06 22:34:58,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:34:58,054 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:34:58,065 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_e1bbdd95-9e56-4248-9012-754eab9ee170/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i[950,963] [2021-12-06 22:34:58,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:34:58,082 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:34:58,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:34:58 WrapperNode [2021-12-06 22:34:58,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:34:58,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:34:58,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:34:58,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:34:58,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:34:58" (1/1) ... [2021-12-06 22:34:58,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:34:58" (1/1) ... [2021-12-06 22:34:58,107 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2021-12-06 22:34:58,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:34:58,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:34:58,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:34:58,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:34:58,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:34:58" (1/1) ... [2021-12-06 22:34:58,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:34:58" (1/1) ... [2021-12-06 22:34:58,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:34:58" (1/1) ... [2021-12-06 22:34:58,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:34:58" (1/1) ... [2021-12-06 22:34:58,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:34:58" (1/1) ... [2021-12-06 22:34:58,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:34:58" (1/1) ... [2021-12-06 22:34:58,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:34:58" (1/1) ... [2021-12-06 22:34:58,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:34:58,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:34:58,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:34:58,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:34:58,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:34:58" (1/1) ... [2021-12-06 22:34:58,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:34:58,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:34:58,158 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:34:58,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:34:58,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:34:58,196 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 22:34:58,196 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 22:34:58,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:34:58,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:34:58,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:34:58,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 22:34:58,196 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 22:34:58,242 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:34:58,243 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:34:58,319 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:34:58,324 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:34:58,324 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 22:34:58,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:34:58 BoogieIcfgContainer [2021-12-06 22:34:58,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:34:58,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:34:58,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:34:58,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:34:58,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:34:57" (1/3) ... [2021-12-06 22:34:58,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283944c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:34:58, skipping insertion in model container [2021-12-06 22:34:58,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:34:58" (2/3) ... [2021-12-06 22:34:58,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283944c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:34:58, skipping insertion in model container [2021-12-06 22:34:58,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:34:58" (3/3) ... [2021-12-06 22:34:58,331 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound50.i [2021-12-06 22:34:58,335 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:34:58,335 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:34:58,369 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:34:58,374 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 [2021-12-06 22:34:58,374 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 22:34:58,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 22:34:58,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 22:34:58,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:34:58,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:34:58,391 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:34:58,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:34:58,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2021-12-06 22:34:58,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:34:58,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931590093] [2021-12-06 22:34:58,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:58,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:34:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:58,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:34:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:58,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:34:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:34:58,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:34:58,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931590093] [2021-12-06 22:34:58,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931590093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:34:58,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:34:58,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:34:58,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212137232] [2021-12-06 22:34:58,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:34:58,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 22:34:58,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:34:58,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 22:34:58,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 22:34:58,550 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 22:34:58,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:34:58,569 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2021-12-06 22:34:58,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 22:34:58,571 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-12-06 22:34:58,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:34:58,579 INFO L225 Difference]: With dead ends: 53 [2021-12-06 22:34:58,579 INFO L226 Difference]: Without dead ends: 24 [2021-12-06 22:34:58,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 22:34:58,585 INFO L933 BasicCegarLoop]: 34 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, 34 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 [2021-12-06 22:34:58,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:34:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-06 22:34:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-06 22:34:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 22:34:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-06 22:34:58,617 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2021-12-06 22:34:58,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:34:58,618 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-06 22:34:58,618 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 22:34:58,618 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-12-06 22:34:58,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 22:34:58,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:34:58,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:34:58,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:34:58,620 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:34:58,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:34:58,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2021-12-06 22:34:58,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:34:58,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604423626] [2021-12-06 22:34:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:58,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:34:58,636 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:34:58,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516492349] [2021-12-06 22:34:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:58,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:58,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:34:58,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:34:58,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:34:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:58,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 22:34:58,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:34:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:34:58,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:34:58,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:34:58,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604423626] [2021-12-06 22:34:58,766 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:34:58,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516492349] [2021-12-06 22:34:58,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516492349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:34:58,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:34:58,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:34:58,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735641267] [2021-12-06 22:34:58,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:34:58,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:34:58,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:34:58,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:34:58,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:34:58,770 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-12-06 22:34:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:34:58,785 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-12-06 22:34:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:34:58,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 21 [2021-12-06 22:34:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:34:58,787 INFO L225 Difference]: With dead ends: 38 [2021-12-06 22:34:58,787 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 22:34:58,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:34:58,789 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 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 [2021-12-06 22:34:58,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:34:58,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 22:34:58,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-06 22:34:58,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 22:34:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-12-06 22:34:58,797 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2021-12-06 22:34:58,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:34:58,798 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-12-06 22:34:58,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-12-06 22:34:58,798 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-12-06 22:34:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 22:34:58,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:34:58,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:34:58,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:34:59,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:59,002 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:34:59,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:34:59,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2021-12-06 22:34:59,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:34:59,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322583327] [2021-12-06 22:34:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:59,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:34:59,072 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:34:59,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985102016] [2021-12-06 22:34:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:59,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:59,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:34:59,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:34:59,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:34:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:59,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 22:34:59,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:34:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:34:59,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:34:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:34:59,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:34:59,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322583327] [2021-12-06 22:34:59,473 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:34:59,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985102016] [2021-12-06 22:34:59,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985102016] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 22:34:59,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:34:59,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-12-06 22:34:59,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788916173] [2021-12-06 22:34:59,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:34:59,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:34:59,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:34:59,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:34:59,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:34:59,475 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-12-06 22:34:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:34:59,584 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-12-06 22:34:59,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:34:59,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 22 [2021-12-06 22:34:59,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:34:59,585 INFO L225 Difference]: With dead ends: 38 [2021-12-06 22:34:59,585 INFO L226 Difference]: Without dead ends: 35 [2021-12-06 22:34:59,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:34:59,587 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:34:59,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 90 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:34:59,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-06 22:34:59,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-06 22:34:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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) [2021-12-06 22:34:59,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-12-06 22:34:59,592 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2021-12-06 22:34:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:34:59,593 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-12-06 22:34:59,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-12-06 22:34:59,593 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-12-06 22:34:59,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 22:34:59,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:34:59,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:34:59,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:34:59,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:59,796 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:34:59,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:34:59,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1106421036, now seen corresponding path program 1 times [2021-12-06 22:34:59,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:34:59,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563616300] [2021-12-06 22:34:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:59,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:34:59,837 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:34:59,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135864370] [2021-12-06 22:34:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:59,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:59,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:34:59,839 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:34:59,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:34:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:59,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 22:34:59,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:34:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:34:59,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:34:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:34:59,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:34:59,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563616300] [2021-12-06 22:34:59,940 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:34:59,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135864370] [2021-12-06 22:34:59,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135864370] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:34:59,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:34:59,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-06 22:34:59,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245288508] [2021-12-06 22:34:59,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:34:59,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:34:59,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:34:59,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:34:59,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:34:59,942 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 22:34:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:34:59,987 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2021-12-06 22:34:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:34:59,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2021-12-06 22:34:59,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:34:59,988 INFO L225 Difference]: With dead ends: 69 [2021-12-06 22:34:59,988 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 22:34:59,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:34:59,990 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:34:59,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 145 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:34:59,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 22:34:59,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2021-12-06 22:34:59,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 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) [2021-12-06 22:34:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-12-06 22:34:59,995 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2021-12-06 22:34:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:34:59,996 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-12-06 22:34:59,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 22:34:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-12-06 22:34:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 22:34:59,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:34:59,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:35:00,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:35:00,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:00,199 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:35:00,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:35:00,201 INFO L85 PathProgramCache]: Analyzing trace with hash -450968108, now seen corresponding path program 1 times [2021-12-06 22:35:00,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:35:00,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529852720] [2021-12-06 22:35:00,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:00,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:35:00,239 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:35:00,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842610920] [2021-12-06 22:35:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:00,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:00,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:35:00,241 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:35:00,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:35:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:35:00,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 22:35:00,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:35:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:35:00,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:35:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:35:00,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:35:00,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529852720] [2021-12-06 22:35:00,574 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:35:00,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842610920] [2021-12-06 22:35:00,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842610920] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 22:35:00,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:35:00,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-12-06 22:35:00,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949244013] [2021-12-06 22:35:00,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:35:00,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:35:00,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:35:00,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:35:00,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:35:00,576 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-12-06 22:35:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:35:00,595 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-12-06 22:35:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:35:00,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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 25 [2021-12-06 22:35:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:35:00,597 INFO L225 Difference]: With dead ends: 53 [2021-12-06 22:35:00,598 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 22:35:00,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:35:00,599 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:35:00,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 138 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2021-12-06 22:35:00,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 22:35:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-12-06 22:35:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 41 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 22:35:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-06 22:35:00,608 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 25 [2021-12-06 22:35:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:35:00,608 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-06 22:35:00,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-12-06 22:35:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-06 22:35:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 22:35:00,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:35:00,610 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:35:00,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:35:00,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:00,811 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:35:00,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:35:00,812 INFO L85 PathProgramCache]: Analyzing trace with hash -452755568, now seen corresponding path program 1 times [2021-12-06 22:35:00,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:35:00,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459002475] [2021-12-06 22:35:00,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:00,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:35:00,826 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:35:00,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241452019] [2021-12-06 22:35:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:00,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:00,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:35:00,827 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:35:00,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:35:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:35:00,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 22:35:00,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:35:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:35:00,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:35:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:35:00,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:35:00,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459002475] [2021-12-06 22:35:00,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:35:00,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241452019] [2021-12-06 22:35:00,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241452019] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:35:00,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:35:00,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-12-06 22:35:00,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856542340] [2021-12-06 22:35:00,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:35:00,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 22:35:00,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:35:00,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 22:35:00,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:35:00,963 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 22:35:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:35:01,030 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2021-12-06 22:35:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:35:01,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2021-12-06 22:35:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:35:01,033 INFO L225 Difference]: With dead ends: 124 [2021-12-06 22:35:01,033 INFO L226 Difference]: Without dead ends: 117 [2021-12-06 22:35:01,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:35:01,035 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 68 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:35:01,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 143 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:35:01,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-06 22:35:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2021-12-06 22:35:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 92 states have internal predecessors, (107), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 22:35:01,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2021-12-06 22:35:01,046 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 25 [2021-12-06 22:35:01,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:35:01,046 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2021-12-06 22:35:01,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 22:35:01,047 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2021-12-06 22:35:01,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 22:35:01,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:35:01,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:35:01,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 22:35:01,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:01,249 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:35:01,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:35:01,250 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2021-12-06 22:35:01,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:35:01,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351578258] [2021-12-06 22:35:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:01,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:35:01,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:35:01,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890215335] [2021-12-06 22:35:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:01,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:01,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:35:01,273 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:35:01,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:35:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:35:01,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 22:35:01,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:35:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:35:01,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:35:01,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:35:01,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351578258] [2021-12-06 22:35:01,350 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:35:01,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890215335] [2021-12-06 22:35:01,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890215335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:35:01,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:35:01,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:35:01,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294539105] [2021-12-06 22:35:01,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:35:01,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:35:01,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:35:01,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:35:01,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:35:01,351 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 22:35:01,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:35:01,363 INFO L93 Difference]: Finished difference Result 151 states and 185 transitions. [2021-12-06 22:35:01,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:35:01,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-12-06 22:35:01,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:35:01,365 INFO L225 Difference]: With dead ends: 151 [2021-12-06 22:35:01,365 INFO L226 Difference]: Without dead ends: 96 [2021-12-06 22:35:01,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:35:01,366 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 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 [2021-12-06 22:35:01,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:35:01,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-06 22:35:01,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-06 22:35:01,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 80 states have internal predecessors, (94), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 22:35:01,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2021-12-06 22:35:01,375 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 31 [2021-12-06 22:35:01,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:35:01,375 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2021-12-06 22:35:01,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 22:35:01,376 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2021-12-06 22:35:01,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 22:35:01,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:35:01,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:35:01,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:35:01,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 22:35:01,578 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:35:01,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:35:01,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1505101988, now seen corresponding path program 1 times [2021-12-06 22:35:01,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:35:01,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416450893] [2021-12-06 22:35:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:01,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:35:01,615 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:35:01,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586514430] [2021-12-06 22:35:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:01,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:01,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:35:01,617 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:35:01,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:35:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:35:01,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 22:35:01,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:35:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 22:35:01,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:35:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 22:35:01,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:35:01,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416450893] [2021-12-06 22:35:01,774 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:35:01,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586514430] [2021-12-06 22:35:01,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586514430] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:35:01,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:35:01,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-12-06 22:35:01,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912964497] [2021-12-06 22:35:01,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:35:01,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 22:35:01,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:35:01,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 22:35:01,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:35:01,775 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 22:35:03,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 22:35:03,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:35:03,852 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2021-12-06 22:35:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:35:03,852 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-12-06 22:35:03,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:35:03,854 INFO L225 Difference]: With dead ends: 111 [2021-12-06 22:35:03,854 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 22:35:03,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:35:03,855 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:35:03,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 128 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 22:35:03,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 22:35:03,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-06 22:35:03,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 76 states have internal predecessors, (88), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 22:35:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2021-12-06 22:35:03,862 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 31 [2021-12-06 22:35:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:35:03,863 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2021-12-06 22:35:03,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 22:35:03,863 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2021-12-06 22:35:03,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 22:35:03,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:35:03,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:35:03,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:35:04,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:04,066 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:35:04,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:35:04,067 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2021-12-06 22:35:04,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:35:04,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402212758] [2021-12-06 22:35:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:04,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:35:04,106 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:35:04,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845782576] [2021-12-06 22:35:04,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:04,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:04,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:35:04,109 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:35:04,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bbdd95-9e56-4248-9012-754eab9ee170/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process