./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX --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 32c4229282aa8583dd78af7db3951b4b02cf6352dc78922adb29bd4d79cf61bb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:44:29,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:44:29,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:44:29,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:44:29,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:44:29,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:44:29,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:44:29,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:44:29,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:44:29,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:44:29,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:44:29,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:44:29,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:44:29,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:44:29,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:44:29,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:44:29,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:44:29,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:44:29,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:44:29,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:44:29,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:44:29,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:44:29,618 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:44:29,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:44:29,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:44:29,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:44:29,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:44:29,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:44:29,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:44:29,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:44:29,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:44:29,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:44:29,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:44:29,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:44:29,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:44:29,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:44:29,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:44:29,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:44:29,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:44:29,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:44:29,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:44:29,642 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:44:29,703 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:44:29,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:44:29,704 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:44:29,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:44:29,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:44:29,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:44:29,712 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:44:29,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:44:29,713 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:44:29,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:44:29,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:44:29,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:44:29,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:44:29,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:44:29,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:44:29,716 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:44:29,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:44:29,716 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:44:29,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:44:29,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:44:29,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:44:29,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:44:29,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:44:29,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:44:29,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:44:29,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:44:29,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:44:29,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:44:29,719 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:44:29,721 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:44:29,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:44:29,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:44:29,737 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_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32c4229282aa8583dd78af7db3951b4b02cf6352dc78922adb29bd4d79cf61bb [2021-11-09 10:44:29,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:44:30,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:44:30,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:44:30,019 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:44:30,019 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:44:30,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i [2021-11-09 10:44:30,086 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/data/5689a1663/79a22bdf02b643bbab759334496937a6/FLAG57abb6b58 [2021-11-09 10:44:30,681 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:44:30,682 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i [2021-11-09 10:44:30,695 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/data/5689a1663/79a22bdf02b643bbab759334496937a6/FLAG57abb6b58 [2021-11-09 10:44:30,980 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/data/5689a1663/79a22bdf02b643bbab759334496937a6 [2021-11-09 10:44:30,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:44:30,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:44:30,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:44:30,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:44:30,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:44:30,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:30" (1/1) ... [2021-11-09 10:44:30,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ee9f7f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:30, skipping insertion in model container [2021-11-09 10:44:30,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:30" (1/1) ... [2021-11-09 10:44:30,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:44:31,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:44:31,162 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i[999,1012] [2021-11-09 10:44:31,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:44:31,190 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:44:31,204 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i[999,1012] [2021-11-09 10:44:31,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:44:31,226 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:44:31,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:31 WrapperNode [2021-11-09 10:44:31,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:44:31,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:44:31,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:44:31,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:44:31,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:31" (1/1) ... [2021-11-09 10:44:31,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:31" (1/1) ... [2021-11-09 10:44:31,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:44:31,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:44:31,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:44:31,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:44:31,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:31" (1/1) ... [2021-11-09 10:44:31,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:31" (1/1) ... [2021-11-09 10:44:31,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:31" (1/1) ... [2021-11-09 10:44:31,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:31" (1/1) ... [2021-11-09 10:44:31,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:31" (1/1) ... [2021-11-09 10:44:31,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:31" (1/1) ... [2021-11-09 10:44:31,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:31" (1/1) ... [2021-11-09 10:44:31,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:44:31,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:44:31,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:44:31,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:44:31,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:31" (1/1) ... [2021-11-09 10:44:31,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:44:31,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:31,332 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:44:31,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:44:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 10:44:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:44:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 10:44:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:44:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 10:44:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 10:44:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:44:31,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:44:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 10:44:31,693 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:44:31,694 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-09 10:44:31,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:31 BoogieIcfgContainer [2021-11-09 10:44:31,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:44:31,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:44:31,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:44:31,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:44:31,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:44:30" (1/3) ... [2021-11-09 10:44:31,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e7bf3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:31, skipping insertion in model container [2021-11-09 10:44:31,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:31" (2/3) ... [2021-11-09 10:44:31,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e7bf3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:31, skipping insertion in model container [2021-11-09 10:44:31,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:31" (3/3) ... [2021-11-09 10:44:31,706 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_monotonic.i [2021-11-09 10:44:31,711 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:44:31,712 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:44:31,765 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:44:31,772 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 10:44:31,772 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:44:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:31,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-09 10:44:31,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:31,794 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:31,795 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:31,801 INFO L85 PathProgramCache]: Analyzing trace with hash 590963434, now seen corresponding path program 1 times [2021-11-09 10:44:31,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:31,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781767640] [2021-11-09 10:44:31,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:31,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:32,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:32,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781767640] [2021-11-09 10:44:32,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781767640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:32,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:32,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:44:32,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590379121] [2021-11-09 10:44:32,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:44:32,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:32,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:44:32,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:44:32,065 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:32,085 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2021-11-09 10:44:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:44:32,086 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-09 10:44:32,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:32,094 INFO L225 Difference]: With dead ends: 28 [2021-11-09 10:44:32,095 INFO L226 Difference]: Without dead ends: 14 [2021-11-09 10:44:32,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:44:32,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-09 10:44:32,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-09 10:44:32,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-09 10:44:32,135 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-11-09 10:44:32,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:32,136 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-09 10:44:32,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,137 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-09 10:44:32,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-09 10:44:32,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:32,140 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:32,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:44:32,142 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:32,146 INFO L85 PathProgramCache]: Analyzing trace with hash 218784471, now seen corresponding path program 1 times [2021-11-09 10:44:32,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:32,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467269273] [2021-11-09 10:44:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:32,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:32,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:32,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467269273] [2021-11-09 10:44:32,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467269273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:32,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:32,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:44:32,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968686400] [2021-11-09 10:44:32,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:44:32,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:32,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:44:32,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:44:32,267 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:32,323 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-11-09 10:44:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:44:32,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-09 10:44:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:32,325 INFO L225 Difference]: With dead ends: 33 [2021-11-09 10:44:32,325 INFO L226 Difference]: Without dead ends: 25 [2021-11-09 10:44:32,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:44:32,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-09 10:44:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2021-11-09 10:44:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-11-09 10:44:32,331 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2021-11-09 10:44:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:32,332 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-11-09 10:44:32,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,333 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-11-09 10:44:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 10:44:32,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:32,334 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:32,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:44:32,334 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:32,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:32,335 INFO L85 PathProgramCache]: Analyzing trace with hash 212359228, now seen corresponding path program 1 times [2021-11-09 10:44:32,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:32,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241853385] [2021-11-09 10:44:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:32,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:32,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:32,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241853385] [2021-11-09 10:44:32,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241853385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:32,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856487214] [2021-11-09 10:44:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:32,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:32,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:32,430 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:32,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:44:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:32,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:44:32,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:32,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856487214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:32,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:32,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 10:44:32,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770075832] [2021-11-09 10:44:32,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:44:32,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:32,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:44:32,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:32,606 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:32,651 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-11-09 10:44:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-09 10:44:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:32,653 INFO L225 Difference]: With dead ends: 44 [2021-11-09 10:44:32,653 INFO L226 Difference]: Without dead ends: 36 [2021-11-09 10:44:32,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:32,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-09 10:44:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 19. [2021-11-09 10:44:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-09 10:44:32,660 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-11-09 10:44:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:32,661 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-09 10:44:32,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-09 10:44:32,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 10:44:32,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:32,663 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:32,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:32,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:32,890 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:32,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:32,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2010321697, now seen corresponding path program 2 times [2021-11-09 10:44:32,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:32,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059158281] [2021-11-09 10:44:32,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:32,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:33,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:33,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059158281] [2021-11-09 10:44:33,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059158281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:33,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613594200] [2021-11-09 10:44:33,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:33,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:33,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:33,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:33,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:44:33,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:33,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:33,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:44:33,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:33,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613594200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:33,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:33,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-09 10:44:33,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616480378] [2021-11-09 10:44:33,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:44:33,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:33,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:44:33,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:44:33,260 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:33,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:33,326 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2021-11-09 10:44:33,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:44:33,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-09 10:44:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:33,330 INFO L225 Difference]: With dead ends: 55 [2021-11-09 10:44:33,330 INFO L226 Difference]: Without dead ends: 47 [2021-11-09 10:44:33,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:44:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-09 10:44:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 23. [2021-11-09 10:44:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:33,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-11-09 10:44:33,345 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2021-11-09 10:44:33,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:33,346 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-11-09 10:44:33,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:33,347 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-11-09 10:44:33,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:44:33,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:33,349 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:33,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:33,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:33,566 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:33,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:33,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2018782330, now seen corresponding path program 3 times [2021-11-09 10:44:33,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:33,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186060092] [2021-11-09 10:44:33,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:33,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:33,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:33,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186060092] [2021-11-09 10:44:33,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186060092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:33,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828222025] [2021-11-09 10:44:33,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:44:33,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:33,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:33,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:33,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:44:33,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 10:44:33,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:33,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:44:33,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:33,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828222025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:33,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:33,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-09 10:44:33,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478062322] [2021-11-09 10:44:33,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:44:33,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:33,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:44:33,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:44:33,968 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:34,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:34,027 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-11-09 10:44:34,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:44:34,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-09 10:44:34,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:34,029 INFO L225 Difference]: With dead ends: 66 [2021-11-09 10:44:34,029 INFO L226 Difference]: Without dead ends: 58 [2021-11-09 10:44:34,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:44:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-09 10:44:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 27. [2021-11-09 10:44:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-11-09 10:44:34,034 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 20 [2021-11-09 10:44:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:34,035 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-11-09 10:44:34,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-11-09 10:44:34,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 10:44:34,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:34,036 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:34,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:34,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:34,250 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:34,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:34,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2102142613, now seen corresponding path program 4 times [2021-11-09 10:44:34,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:34,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123501341] [2021-11-09 10:44:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:34,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:34,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:34,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123501341] [2021-11-09 10:44:34,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123501341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:34,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216016926] [2021-11-09 10:44:34,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:44:34,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:34,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:34,340 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:34,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:44:34,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:44:34,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:34,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:44:34,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:34,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216016926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:34,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:34,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-09 10:44:34,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426448275] [2021-11-09 10:44:34,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:44:34,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:34,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:44:34,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:44:34,546 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:34,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:34,603 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2021-11-09 10:44:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:44:34,604 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 10:44:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:34,605 INFO L225 Difference]: With dead ends: 77 [2021-11-09 10:44:34,605 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 10:44:34,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:44:34,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 10:44:34,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 31. [2021-11-09 10:44:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-09 10:44:34,610 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 24 [2021-11-09 10:44:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:34,611 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-09 10:44:34,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:34,611 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-09 10:44:34,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:44:34,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:34,612 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:34,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:34,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 10:44:34,833 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:34,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:34,834 INFO L85 PathProgramCache]: Analyzing trace with hash 214721744, now seen corresponding path program 5 times [2021-11-09 10:44:34,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:34,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972480479] [2021-11-09 10:44:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:34,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:34,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:34,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972480479] [2021-11-09 10:44:34,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972480479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:34,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783181059] [2021-11-09 10:44:34,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:44:34,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:34,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:34,927 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:34,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:44:35,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 10:44:35,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:35,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 10:44:35,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:35,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783181059] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:35,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:35,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-09 10:44:35,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317697851] [2021-11-09 10:44:35,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:44:35,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:35,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:44:35,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:44:35,761 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:35,864 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2021-11-09 10:44:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:44:35,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-09 10:44:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:35,865 INFO L225 Difference]: With dead ends: 88 [2021-11-09 10:44:35,865 INFO L226 Difference]: Without dead ends: 80 [2021-11-09 10:44:35,866 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:44:35,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-09 10:44:35,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 35. [2021-11-09 10:44:35,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-11-09 10:44:35,872 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 28 [2021-11-09 10:44:35,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:35,872 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-11-09 10:44:35,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,872 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-11-09 10:44:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 10:44:35,873 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:35,873 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:35,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:36,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:36,090 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:36,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:36,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2000074165, now seen corresponding path program 6 times [2021-11-09 10:44:36,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:36,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261138695] [2021-11-09 10:44:36,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:36,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:36,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:36,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261138695] [2021-11-09 10:44:36,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261138695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:36,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225716965] [2021-11-09 10:44:36,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:44:36,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:36,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:36,266 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:36,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:44:39,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 10:44:39,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:39,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 10:44:39,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:39,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225716965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:39,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:39,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-09 10:44:39,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448006026] [2021-11-09 10:44:39,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:44:39,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:39,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:44:39,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:44:39,510 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:39,600 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2021-11-09 10:44:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:44:39,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 10:44:39,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:39,602 INFO L225 Difference]: With dead ends: 99 [2021-11-09 10:44:39,602 INFO L226 Difference]: Without dead ends: 91 [2021-11-09 10:44:39,604 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:44:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-09 10:44:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 39. [2021-11-09 10:44:39,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:39,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-11-09 10:44:39,623 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 32 [2021-11-09 10:44:39,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:39,623 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-11-09 10:44:39,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-11-09 10:44:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 10:44:39,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:39,627 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:39,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:39,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:39,842 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:39,842 INFO L85 PathProgramCache]: Analyzing trace with hash 278137882, now seen corresponding path program 7 times [2021-11-09 10:44:39,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:39,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663855889] [2021-11-09 10:44:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:39,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:40,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:40,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663855889] [2021-11-09 10:44:40,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663855889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:40,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645751340] [2021-11-09 10:44:40,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:44:40,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:40,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:40,054 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:40,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:44:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:40,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 10:44:40,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:40,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645751340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:40,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:40,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-09 10:44:40,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590771334] [2021-11-09 10:44:40,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:44:40,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:40,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:44:40,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:44:40,319 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:40,411 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2021-11-09 10:44:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:44:40,412 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 10:44:40,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:40,416 INFO L225 Difference]: With dead ends: 110 [2021-11-09 10:44:40,416 INFO L226 Difference]: Without dead ends: 102 [2021-11-09 10:44:40,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:44:40,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-09 10:44:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 43. [2021-11-09 10:44:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:40,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2021-11-09 10:44:40,432 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 36 [2021-11-09 10:44:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:40,433 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2021-11-09 10:44:40,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2021-11-09 10:44:40,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 10:44:40,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:40,437 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:40,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:40,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-09 10:44:40,654 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:40,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:40,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1961207807, now seen corresponding path program 8 times [2021-11-09 10:44:40,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:40,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960016130] [2021-11-09 10:44:40,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:40,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:40,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:40,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960016130] [2021-11-09 10:44:40,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960016130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:40,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270418498] [2021-11-09 10:44:40,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:40,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:40,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:40,845 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:40,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:44:40,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:40,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:41,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 10:44:41,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:41,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270418498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:41,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:41,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-09 10:44:41,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688599191] [2021-11-09 10:44:41,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:44:41,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:41,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:44:41,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:44:41,140 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:41,238 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2021-11-09 10:44:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 10:44:41,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 10:44:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:41,240 INFO L225 Difference]: With dead ends: 121 [2021-11-09 10:44:41,240 INFO L226 Difference]: Without dead ends: 113 [2021-11-09 10:44:41,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:44:41,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-09 10:44:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 47. [2021-11-09 10:44:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2021-11-09 10:44:41,257 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 40 [2021-11-09 10:44:41,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:41,259 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2021-11-09 10:44:41,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:41,260 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2021-11-09 10:44:41,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 10:44:41,266 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:41,266 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:41,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:41,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 10:44:41,494 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:41,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:41,495 INFO L85 PathProgramCache]: Analyzing trace with hash -577975964, now seen corresponding path program 9 times [2021-11-09 10:44:41,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:41,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050343815] [2021-11-09 10:44:41,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:41,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:41,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:41,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050343815] [2021-11-09 10:44:41,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050343815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:41,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991617060] [2021-11-09 10:44:41,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:44:41,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:41,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:41,738 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:41,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 10:48:59,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 10:48:59,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:59,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 10:48:59,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:59,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991617060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:59,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:59,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-09 10:48:59,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117287967] [2021-11-09 10:48:59,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 10:48:59,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:59,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 10:48:59,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:48:59,876 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:59,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:59,985 INFO L93 Difference]: Finished difference Result 132 states and 157 transitions. [2021-11-09 10:48:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:48:59,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 10:48:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:59,987 INFO L225 Difference]: With dead ends: 132 [2021-11-09 10:48:59,987 INFO L226 Difference]: Without dead ends: 124 [2021-11-09 10:48:59,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:48:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-09 10:48:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 51. [2021-11-09 10:48:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-11-09 10:48:59,992 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 44 [2021-11-09 10:48:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:59,992 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-11-09 10:48:59,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-11-09 10:48:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 10:48:59,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:59,994 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:00,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:00,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 10:49:00,221 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:00,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:00,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1900720201, now seen corresponding path program 10 times [2021-11-09 10:49:00,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:00,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099939609] [2021-11-09 10:49:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:00,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:00,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:00,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099939609] [2021-11-09 10:49:00,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099939609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:00,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987737511] [2021-11-09 10:49:00,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:49:00,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:00,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:00,414 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:00,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 10:49:46,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:49:46,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:46,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 10:49:46,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:46,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987737511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:46,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:46,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-09 10:49:46,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524578222] [2021-11-09 10:49:46,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:49:46,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:46,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:49:46,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:49:46,852 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:46,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:46,999 INFO L93 Difference]: Finished difference Result 143 states and 170 transitions. [2021-11-09 10:49:46,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 10:49:46,999 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 10:49:47,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:47,001 INFO L225 Difference]: With dead ends: 143 [2021-11-09 10:49:47,002 INFO L226 Difference]: Without dead ends: 135 [2021-11-09 10:49:47,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:49:47,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-09 10:49:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 55. [2021-11-09 10:49:47,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-11-09 10:49:47,018 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 48 [2021-11-09 10:49:47,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:47,019 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-11-09 10:49:47,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:47,020 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-11-09 10:49:47,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 10:49:47,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:47,022 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:47,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:47,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 10:49:47,223 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:47,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:47,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1807704914, now seen corresponding path program 11 times [2021-11-09 10:49:47,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:47,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254639524] [2021-11-09 10:49:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:47,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:47,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:47,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254639524] [2021-11-09 10:49:47,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254639524] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:47,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911649955] [2021-11-09 10:49:47,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:49:47,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:47,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:47,399 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:47,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 10:51:13,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-09 10:51:13,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:13,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 10:51:13,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:14,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911649955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:14,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:14,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-09 10:51:14,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233306706] [2021-11-09 10:51:14,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 10:51:14,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:14,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 10:51:14,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:51:14,061 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:14,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:14,201 INFO L93 Difference]: Finished difference Result 154 states and 183 transitions. [2021-11-09 10:51:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 10:51:14,201 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 10:51:14,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:14,203 INFO L225 Difference]: With dead ends: 154 [2021-11-09 10:51:14,203 INFO L226 Difference]: Without dead ends: 146 [2021-11-09 10:51:14,204 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:51:14,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-09 10:51:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 59. [2021-11-09 10:51:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2021-11-09 10:51:14,211 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 52 [2021-11-09 10:51:14,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:14,211 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2021-11-09 10:51:14,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:14,212 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2021-11-09 10:51:14,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 10:51:14,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:14,214 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:14,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:14,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 10:51:14,441 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:14,442 INFO L85 PathProgramCache]: Analyzing trace with hash 938462867, now seen corresponding path program 12 times [2021-11-09 10:51:14,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:14,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007844151] [2021-11-09 10:51:14,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:14,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:14,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:14,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007844151] [2021-11-09 10:51:14,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007844151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:14,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955952532] [2021-11-09 10:51:14,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:51:14,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:14,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:14,759 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:14,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79ce57b3-c8ae-4676-9367-a966ce6244a9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process