./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC --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 02b49c30f483a6aa3961a4e1c70cfb198ad8047e ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:24:20,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:24:20,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:24:20,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:24:20,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:24:20,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:24:20,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:24:20,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:24:20,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:24:20,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:24:20,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:24:20,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:24:20,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:24:20,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:24:20,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:24:20,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:24:20,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:24:20,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:24:20,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:24:20,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:24:20,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:24:20,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:24:20,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:24:20,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:24:20,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:24:20,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:24:20,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:24:20,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:24:20,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:24:20,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:24:20,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:24:20,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:24:20,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:24:20,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:24:20,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:24:20,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:24:20,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:24:20,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:24:20,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:24:20,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:24:20,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:24:20,711 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:24:20,758 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:24:20,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:24:20,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:24:20,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:24:20,761 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:24:20,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:24:20,762 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:24:20,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:24:20,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:24:20,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:24:20,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:24:20,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:24:20,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:24:20,765 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:24:20,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:24:20,765 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:24:20,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:24:20,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:24:20,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:24:20,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:24:20,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:24:20,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:24:20,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:24:20,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:24:20,767 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:24:20,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:24:20,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:24:20,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:24:20,768 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_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02b49c30f483a6aa3961a4e1c70cfb198ad8047e [2021-10-11 00:24:21,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:24:21,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:24:21,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:24:21,049 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:24:21,050 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:24:21,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c [2021-10-11 00:24:21,164 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/data/99467085d/4b6697ec52c741ca88e6eac9d16acacf/FLAG58d85bbfa [2021-10-11 00:24:21,664 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:24:21,665 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c [2021-10-11 00:24:21,672 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/data/99467085d/4b6697ec52c741ca88e6eac9d16acacf/FLAG58d85bbfa [2021-10-11 00:24:22,011 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/data/99467085d/4b6697ec52c741ca88e6eac9d16acacf [2021-10-11 00:24:22,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:24:22,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:24:22,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:24:22,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:24:22,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:24:22,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:24:22" (1/1) ... [2021-10-11 00:24:22,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@542c16b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:22, skipping insertion in model container [2021-10-11 00:24:22,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:24:22" (1/1) ... [2021-10-11 00:24:22,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:24:22,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:24:22,187 WARN L226 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_66803944-1d5d-44a6-aa82-0abddfeae089/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c[458,471] [2021-10-11 00:24:22,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:24:22,233 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:24:22,249 WARN L226 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_66803944-1d5d-44a6-aa82-0abddfeae089/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c[458,471] [2021-10-11 00:24:22,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:24:22,272 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:24:22,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:22 WrapperNode [2021-10-11 00:24:22,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:24:22,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:24:22,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:24:22,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:24:22,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:22" (1/1) ... [2021-10-11 00:24:22,290 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:22" (1/1) ... [2021-10-11 00:24:22,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:24:22,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:24:22,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:24:22,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:24:22,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:22" (1/1) ... [2021-10-11 00:24:22,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:22" (1/1) ... [2021-10-11 00:24:22,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:22" (1/1) ... [2021-10-11 00:24:22,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:22" (1/1) ... [2021-10-11 00:24:22,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:22" (1/1) ... [2021-10-11 00:24:22,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:22" (1/1) ... [2021-10-11 00:24:22,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:22" (1/1) ... [2021-10-11 00:24:22,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:24:22,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:24:22,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:24:22,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:24:22,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:22" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:24:22,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:24:22,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:24:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:24:22,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:24:22,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:24:22,739 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-11 00:24:22,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:24:22 BoogieIcfgContainer [2021-10-11 00:24:22,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:24:22,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:24:22,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:24:22,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:24:22,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:24:22" (1/3) ... [2021-10-11 00:24:22,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7192249d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:24:22, skipping insertion in model container [2021-10-11 00:24:22,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:22" (2/3) ... [2021-10-11 00:24:22,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7192249d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:24:22, skipping insertion in model container [2021-10-11 00:24:22,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:24:22" (3/3) ... [2021-10-11 00:24:22,749 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound2.c [2021-10-11 00:24:22,763 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:24:22,767 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-10-11 00:24:22,780 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-11 00:24:22,806 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:24:22,807 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:24:22,807 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:24:22,807 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:24:22,807 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:24:22,807 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:24:22,807 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:24:22,808 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:24:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2021-10-11 00:24:22,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 00:24:22,831 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:24:22,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:24:22,832 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:24:22,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:24:22,838 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2021-10-11 00:24:22,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:24:22,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496748832] [2021-10-11 00:24:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:24:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:24:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:24:23,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496748832] [2021-10-11 00:24:23,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:24:23,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:24:23,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160754340] [2021-10-11 00:24:23,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:24:23,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:24:23,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:24:23,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:24:23,033 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2021-10-11 00:24:23,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:24:23,047 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-10-11 00:24:23,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:24:23,048 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-10-11 00:24:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:24:23,055 INFO L225 Difference]: With dead ends: 41 [2021-10-11 00:24:23,056 INFO L226 Difference]: Without dead ends: 18 [2021-10-11 00:24:23,058 INFO L677 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 [2021-10-11 00:24:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-11 00:24:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-11 00:24:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-11 00:24:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-11 00:24:23,091 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2021-10-11 00:24:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:24:23,092 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-11 00:24:23,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:24:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-11 00:24:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 00:24:23,093 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:24:23,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:24:23,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:24:23,093 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:24:23,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:24:23,095 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-10-11 00:24:23,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:24:23,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994234383] [2021-10-11 00:24:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:24:23,117 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:24:23,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497071905] [2021-10-11 00:24:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:24:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:24:23,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-11 00:24:23,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:24:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:24:23,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994234383] [2021-10-11 00:24:23,348 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:24:23,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497071905] [2021-10-11 00:24:23,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:24:23,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 00:24:23,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189742910] [2021-10-11 00:24:23,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:24:23,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:24:23,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:24:23,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:24:23,353 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2021-10-11 00:24:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:24:23,495 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-10-11 00:24:23,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:24:23,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-10-11 00:24:23,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:24:23,500 INFO L225 Difference]: With dead ends: 36 [2021-10-11 00:24:23,500 INFO L226 Difference]: Without dead ends: 25 [2021-10-11 00:24:23,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:24:23,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-11 00:24:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-10-11 00:24:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 00:24:23,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-11 00:24:23,508 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2021-10-11 00:24:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:24:23,509 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-11 00:24:23,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:24:23,509 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-11 00:24:23,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 00:24:23,510 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:24:23,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:24:23,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 00:24:23,711 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:24:23,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:24:23,712 INFO L82 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2021-10-11 00:24:23,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:24:23,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46720307] [2021-10-11 00:24:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:24:23,731 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:24:23,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143492665] [2021-10-11 00:24:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:24:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:24:23,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-11 00:24:23,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:24:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:24:23,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46720307] [2021-10-11 00:24:23,890 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:24:23,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143492665] [2021-10-11 00:24:23,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:24:23,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-11 00:24:23,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394419649] [2021-10-11 00:24:23,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:24:23,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:24:23,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:24:23,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:24:23,892 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2021-10-11 00:24:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:24:24,080 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-10-11 00:24:24,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:24:24,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-10-11 00:24:24,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:24:24,083 INFO L225 Difference]: With dead ends: 39 [2021-10-11 00:24:24,083 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 00:24:24,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-11 00:24:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 00:24:24,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-10-11 00:24:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 00:24:24,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-10-11 00:24:24,093 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-10-11 00:24:24,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:24:24,093 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-10-11 00:24:24,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:24:24,093 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-10-11 00:24:24,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-11 00:24:24,094 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:24:24,094 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:24:24,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:24:24,300 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:24:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:24:24,301 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2021-10-11 00:24:24,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:24:24,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644360303] [2021-10-11 00:24:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:24:24,314 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:24:24,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789709303] [2021-10-11 00:24:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:24:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:24:24,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:24:24,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:24:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:24:24,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644360303] [2021-10-11 00:24:24,462 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:24:24,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789709303] [2021-10-11 00:24:24,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:24:24,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-11 00:24:24,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328657878] [2021-10-11 00:24:24,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:24:24,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:24:24,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:24:24,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:24:24,472 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2021-10-11 00:24:24,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:24:24,552 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-10-11 00:24:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:24:24,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-10-11 00:24:24,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:24:24,554 INFO L225 Difference]: With dead ends: 34 [2021-10-11 00:24:24,554 INFO L226 Difference]: Without dead ends: 28 [2021-10-11 00:24:24,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:24:24,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-11 00:24:24,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-11 00:24:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 00:24:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-11 00:24:24,561 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2021-10-11 00:24:24,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:24:24,561 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-11 00:24:24,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:24:24,561 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-11 00:24:24,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 00:24:24,575 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:24:24,575 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 00:24:24,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:24:24,796 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:24:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:24:24,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1290921348, now seen corresponding path program 2 times [2021-10-11 00:24:24,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:24:24,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793849853] [2021-10-11 00:24:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:24:24,813 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:24:24,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600942202] [2021-10-11 00:24:24,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:24:24,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:24:24,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:24:24,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:24:24,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:24:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:24:24,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793849853] [2021-10-11 00:24:24,975 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:24:24,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600942202] [2021-10-11 00:24:24,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:24:24,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-11 00:24:24,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64697246] [2021-10-11 00:24:24,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:24:24,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:24:24,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:24:24,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:24:24,978 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2021-10-11 00:24:25,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:24:25,010 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-10-11 00:24:25,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:24:25,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2021-10-11 00:24:25,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:24:25,012 INFO L225 Difference]: With dead ends: 38 [2021-10-11 00:24:25,012 INFO L226 Difference]: Without dead ends: 24 [2021-10-11 00:24:25,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:24:25,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-11 00:24:25,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-11 00:24:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 00:24:25,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-10-11 00:24:25,018 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 16 [2021-10-11 00:24:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:24:25,019 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-10-11 00:24:25,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:24:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-10-11 00:24:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 00:24:25,020 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:24:25,020 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:24:25,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:24:25,248 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:24:25,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:24:25,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2021-10-11 00:24:25,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:24:25,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325151355] [2021-10-11 00:24:25,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:24:25,261 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:24:25,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159237200] [2021-10-11 00:24:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:24:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:24:25,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-11 00:24:25,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:24:25,429 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 00:24:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:24:25,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325151355] [2021-10-11 00:24:25,443 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:24:25,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159237200] [2021-10-11 00:24:25,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:24:25,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-11 00:24:25,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563699874] [2021-10-11 00:24:25,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:24:25,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:24:25,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:24:25,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:24:25,446 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 8 states. [2021-10-11 00:24:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:24:25,619 INFO L93 Difference]: Finished difference Result 28 states and 27 transitions. [2021-10-11 00:24:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:24:25,620 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2021-10-11 00:24:25,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:24:25,621 INFO L225 Difference]: With dead ends: 28 [2021-10-11 00:24:25,621 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 00:24:25,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-10-11 00:24:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 00:24:25,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-11 00:24:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 00:24:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 21 transitions. [2021-10-11 00:24:25,627 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 21 transitions. Word has length 17 [2021-10-11 00:24:25,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:24:25,627 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 21 transitions. [2021-10-11 00:24:25,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:24:25,628 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 21 transitions. [2021-10-11 00:24:25,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 00:24:25,628 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:24:25,629 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:24:25,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-11 00:24:25,842 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:24:25,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:24:25,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1363812488, now seen corresponding path program 1 times [2021-10-11 00:24:25,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:24:25,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665453207] [2021-10-11 00:24:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:24:25,853 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:24:25,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875119988] [2021-10-11 00:24:25,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:24:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:24:26,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-11 00:24:26,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:24:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:24:26,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665453207] [2021-10-11 00:24:26,194 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:24:26,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875119988] [2021-10-11 00:24:26,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:24:26,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-11 00:24:26,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153608793] [2021-10-11 00:24:26,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:24:26,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:24:26,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:24:26,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:24:26,198 INFO L87 Difference]: Start difference. First operand 22 states and 21 transitions. Second operand 8 states. [2021-10-11 00:24:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:24:26,351 INFO L93 Difference]: Finished difference Result 22 states and 21 transitions. [2021-10-11 00:24:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:24:26,352 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2021-10-11 00:24:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:24:26,353 INFO L225 Difference]: With dead ends: 22 [2021-10-11 00:24:26,353 INFO L226 Difference]: Without dead ends: 20 [2021-10-11 00:24:26,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-11 00:24:26,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-11 00:24:26,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-11 00:24:26,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 00:24:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2021-10-11 00:24:26,375 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 17 [2021-10-11 00:24:26,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:24:26,375 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2021-10-11 00:24:26,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:24:26,376 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2021-10-11 00:24:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 00:24:26,377 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:24:26,377 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:24:26,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:24:26,583 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:24:26,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:24:26,583 INFO L82 PathProgramCache]: Analyzing trace with hash 658932075, now seen corresponding path program 2 times [2021-10-11 00:24:26,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:24:26,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453684110] [2021-10-11 00:24:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:24:26,593 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:24:26,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535001227] [2021-10-11 00:24:26,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:24:26,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:24:26,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-11 00:24:26,794 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:24:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:24:26,899 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:24:26,982 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:24:26,983 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:24:27,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:24:27,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:24:27 BoogieIcfgContainer [2021-10-11 00:24:27,218 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:24:27,218 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:24:27,218 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:24:27,219 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:24:27,219 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:24:22" (3/4) ... [2021-10-11 00:24:27,221 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 00:24:27,288 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66803944-1d5d-44a6-aa82-0abddfeae089/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:24:27,288 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:24:27,290 INFO L168 Benchmark]: Toolchain (without parser) took 5273.97 ms. Allocated memory was 104.9 MB in the beginning and 127.9 MB in the end (delta: 23.1 MB). Free memory was 72.4 MB in the beginning and 98.9 MB in the end (delta: -26.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:24:27,291 INFO L168 Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 79.7 MB. Free memory was 37.4 MB in the beginning and 37.3 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:24:27,291 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.17 ms. Allocated memory is still 104.9 MB. Free memory was 72.2 MB in the beginning and 80.6 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:24:27,292 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.23 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 79.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:24:27,292 INFO L168 Benchmark]: Boogie Preprocessor took 22.14 ms. Allocated memory is still 104.9 MB. Free memory was 79.1 MB in the beginning and 78.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:24:27,293 INFO L168 Benchmark]: RCFGBuilder took 407.65 ms. Allocated memory is still 104.9 MB. Free memory was 78.1 MB in the beginning and 65.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 00:24:27,293 INFO L168 Benchmark]: TraceAbstraction took 4475.85 ms. Allocated memory was 104.9 MB in the beginning and 127.9 MB in the end (delta: 23.1 MB). Free memory was 64.4 MB in the beginning and 102.0 MB in the end (delta: -37.6 MB). Peak memory consumption was 54.7 MB. Max. memory is 16.1 GB. [2021-10-11 00:24:27,294 INFO L168 Benchmark]: Witness Printer took 70.15 ms. Allocated memory is still 127.9 MB. Free memory was 102.0 MB in the beginning and 98.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:24:27,297 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 ms. Allocated memory is still 79.7 MB. Free memory was 37.4 MB in the beginning and 37.3 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 256.17 ms. Allocated memory is still 104.9 MB. Free memory was 72.2 MB in the beginning and 80.6 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.23 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 79.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.14 ms. Allocated memory is still 104.9 MB. Free memory was 79.1 MB in the beginning and 78.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 407.65 ms. Allocated memory is still 104.9 MB. Free memory was 78.1 MB in the beginning and 65.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4475.85 ms. Allocated memory was 104.9 MB in the beginning and 127.9 MB in the end (delta: 23.1 MB). Free memory was 64.4 MB in the beginning and 102.0 MB in the end (delta: -37.6 MB). Peak memory consumption was 54.7 MB. Max. memory is 16.1 GB. * Witness Printer took 70.15 ms. Allocated memory is still 127.9 MB. Free memory was 102.0 MB in the beginning and 98.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L7] COND FALSE !(!cond) VAL [counter=0] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [counter=0] [L28] EXPR counter++ VAL [counter=1] [L28] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=1] [L28] EXPR counter++ VAL [counter=2] [L28] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=2] [L28] EXPR counter++ VAL [counter=3] [L28] COND FALSE !(counter++<2) [L10] COND FALSE !(!(cond)) VAL [counter=3] [L10] COND TRUE !(cond) VAL [counter=3] [L12] reach_error() VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.3s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 108 SDtfs, 172 SDslu, 184 SDs, 0 SdLazy, 176 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 86 ConstructedInterpolants, 0 QuantifiedInterpolants, 6346 SizeOfPredicates, 29 NumberOfNonLiveVariables, 495 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 8/27 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...