./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/add-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/add-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7202e877c1332442c2c226005d8bd7e5f4094e339ca214931497ee0f3766da6a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:28:57,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:28:57,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:28:57,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:28:57,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:28:57,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:28:57,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:28:57,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:28:57,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:28:57,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:28:57,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:28:57,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:28:57,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:28:57,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:28:57,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:28:57,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:28:57,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:28:57,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:28:57,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:28:57,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:28:57,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:28:57,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:28:57,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:28:57,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:28:57,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:28:57,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:28:57,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:28:57,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:28:57,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:28:57,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:28:57,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:28:57,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:28:57,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:28:57,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:28:57,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:28:57,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:28:57,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:28:57,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:28:57,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:28:57,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:28:57,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:28:57,772 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:28:57,805 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:28:57,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:28:57,806 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:28:57,807 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:28:57,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:28:57,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:28:57,809 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:28:57,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:28:57,810 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:28:57,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:28:57,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:28:57,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:28:57,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:28:57,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:28:57,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:28:57,822 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:28:57,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:28:57,822 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:28:57,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:28:57,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:28:57,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:28:57,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:28:57,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:28:57,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:28:57,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:28:57,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:28:57,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:28:57,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:28:57,826 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:28:57,828 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:28:57,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:28:57,829 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:28:57,829 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_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7202e877c1332442c2c226005d8bd7e5f4094e339ca214931497ee0f3766da6a [2021-11-23 12:28:58,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:28:58,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:28:58,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:28:58,201 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:28:58,203 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:28:58,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2021-11-23 12:28:58,312 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/data/6e6a7637c/14996fbe7f0f4c28a44ae60d418e62f0/FLAGaf5d59862 [2021-11-23 12:28:58,870 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:28:58,870 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2021-11-23 12:28:58,878 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/data/6e6a7637c/14996fbe7f0f4c28a44ae60d418e62f0/FLAGaf5d59862 [2021-11-23 12:28:59,215 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/data/6e6a7637c/14996fbe7f0f4c28a44ae60d418e62f0 [2021-11-23 12:28:59,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:28:59,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:28:59,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:28:59,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:28:59,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:28:59,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:28:59" (1/1) ... [2021-11-23 12:28:59,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46533d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:59, skipping insertion in model container [2021-11-23 12:28:59,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:28:59" (1/1) ... [2021-11-23 12:28:59,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:28:59,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:28:59,461 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/sv-benchmarks/c/array-multidimensional/add-2-n-u.c[321,334] [2021-11-23 12:28:59,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:28:59,494 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:28:59,507 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/sv-benchmarks/c/array-multidimensional/add-2-n-u.c[321,334] [2021-11-23 12:28:59,519 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:28:59,534 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:28:59,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:59 WrapperNode [2021-11-23 12:28:59,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:28:59,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:28:59,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:28:59,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:28:59,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:59" (1/1) ... [2021-11-23 12:28:59,553 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:59" (1/1) ... [2021-11-23 12:28:59,577 INFO L137 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2021-11-23 12:28:59,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:28:59,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:28:59,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:28:59,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:28:59,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:59" (1/1) ... [2021-11-23 12:28:59,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:59" (1/1) ... [2021-11-23 12:28:59,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:59" (1/1) ... [2021-11-23 12:28:59,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:59" (1/1) ... [2021-11-23 12:28:59,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:59" (1/1) ... [2021-11-23 12:28:59,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:59" (1/1) ... [2021-11-23 12:28:59,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:59" (1/1) ... [2021-11-23 12:28:59,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:28:59,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:28:59,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:28:59,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:28:59,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:59" (1/1) ... [2021-11-23 12:28:59,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:28:59,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:28:59,646 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:28:59,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:28:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:28:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:28:59,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:28:59,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 12:28:59,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:28:59,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:28:59,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:28:59,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:28:59,787 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:28:59,789 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:29:00,031 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:29:00,039 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:29:00,039 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-23 12:29:00,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:29:00 BoogieIcfgContainer [2021-11-23 12:29:00,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:29:00,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:29:00,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:29:00,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:29:00,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:28:59" (1/3) ... [2021-11-23 12:29:00,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffd95e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:29:00, skipping insertion in model container [2021-11-23 12:29:00,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:59" (2/3) ... [2021-11-23 12:29:00,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffd95e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:29:00, skipping insertion in model container [2021-11-23 12:29:00,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:29:00" (3/3) ... [2021-11-23 12:29:00,052 INFO L111 eAbstractionObserver]: Analyzing ICFG add-2-n-u.c [2021-11-23 12:29:00,058 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:29:00,058 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 12:29:00,117 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:29:00,126 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:29:00,126 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 12:29:00,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 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) [2021-11-23 12:29:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 12:29:00,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:00,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:00,151 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:00,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:00,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1817636276, now seen corresponding path program 1 times [2021-11-23 12:29:00,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:00,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305404028] [2021-11-23 12:29:00,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:00,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:00,276 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:29:00,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366706518] [2021-11-23 12:29:00,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:00,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:29:00,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:29:00,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:29:00,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:29:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:00,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:29:00,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:29:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:29:00,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:29:00,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:00,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305404028] [2021-11-23 12:29:00,526 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:29:00,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366706518] [2021-11-23 12:29:00,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366706518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:00,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:00,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:29:00,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702438694] [2021-11-23 12:29:00,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:00,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:29:00,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:00,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:29:00,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:00,602 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:00,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:00,694 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2021-11-23 12:29:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:29:00,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2021-11-23 12:29:00,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:00,710 INFO L225 Difference]: With dead ends: 43 [2021-11-23 12:29:00,711 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 12:29:00,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:00,723 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:00,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:29:00,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 12:29:00,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-23 12:29:00,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 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) [2021-11-23 12:29:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-11-23 12:29:00,785 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2021-11-23 12:29:00,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:00,786 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-11-23 12:29:00,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:00,787 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-11-23 12:29:00,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 12:29:00,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:00,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:00,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:29:01,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:29:01,010 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:01,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:01,011 INFO L85 PathProgramCache]: Analyzing trace with hash 429030367, now seen corresponding path program 1 times [2021-11-23 12:29:01,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:01,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033211655] [2021-11-23 12:29:01,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:01,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:01,037 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:29:01,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566133542] [2021-11-23 12:29:01,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:01,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:29:01,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:29:01,040 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:29:01,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:29:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:01,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:29:01,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:29:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:29:01,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:29:01,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:01,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033211655] [2021-11-23 12:29:01,208 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:29:01,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566133542] [2021-11-23 12:29:01,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566133542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:01,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:01,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:29:01,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620682086] [2021-11-23 12:29:01,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:01,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:29:01,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:01,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:29:01,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:29:01,216 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:01,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:01,303 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2021-11-23 12:29:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:29:01,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 12:29:01,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:01,306 INFO L225 Difference]: With dead ends: 43 [2021-11-23 12:29:01,306 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 12:29:01,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:29:01,309 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:01,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 24 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:29:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 12:29:01,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2021-11-23 12:29:01,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-11-23 12:29:01,318 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2021-11-23 12:29:01,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:01,319 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-11-23 12:29:01,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:01,319 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-11-23 12:29:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 12:29:01,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:01,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:01,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:29:01,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:29:01,546 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:01,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:01,547 INFO L85 PathProgramCache]: Analyzing trace with hash -270581085, now seen corresponding path program 1 times [2021-11-23 12:29:01,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:01,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228200882] [2021-11-23 12:29:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:01,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:01,569 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:29:01,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811566623] [2021-11-23 12:29:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:01,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:29:01,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:29:01,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:29:01,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:29:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:01,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 12:29:01,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:29:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:29:01,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:29:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:29:01,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:01,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228200882] [2021-11-23 12:29:01,791 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:29:01,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811566623] [2021-11-23 12:29:01,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811566623] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:29:01,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:29:01,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-23 12:29:01,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482705791] [2021-11-23 12:29:01,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:29:01,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:29:01,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:01,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:29:01,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:29:01,795 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-11-23 12:29:01,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:01,936 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-11-23 12:29:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:29:01,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) Word has length 14 [2021-11-23 12:29:01,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:01,938 INFO L225 Difference]: With dead ends: 63 [2021-11-23 12:29:01,938 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 12:29:01,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:29:01,940 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:01,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 37 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:29:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 12:29:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-11-23 12:29:01,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2021-11-23 12:29:01,953 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 14 [2021-11-23 12:29:01,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:01,953 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2021-11-23 12:29:01,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-11-23 12:29:01,954 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2021-11-23 12:29:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 12:29:01,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:01,955 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:01,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:29:02,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:29:02,181 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:02,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1443885857, now seen corresponding path program 2 times [2021-11-23 12:29:02,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:02,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967129161] [2021-11-23 12:29:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:02,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:02,192 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:29:02,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214763462] [2021-11-23 12:29:02,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:29:02,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:29:02,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:29:02,194 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:29:02,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:29:02,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 12:29:02,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:29:02,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:29:02,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:29:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:29:02,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:29:02,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:02,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967129161] [2021-11-23 12:29:02,342 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:29:02,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214763462] [2021-11-23 12:29:02,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214763462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:02,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:02,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:29:02,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395647159] [2021-11-23 12:29:02,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:02,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:29:02,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:02,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:29:02,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:29:02,346 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:02,406 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2021-11-23 12:29:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:29:02,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 17 [2021-11-23 12:29:02,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:02,410 INFO L225 Difference]: With dead ends: 84 [2021-11-23 12:29:02,410 INFO L226 Difference]: Without dead ends: 66 [2021-11-23 12:29:02,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:29:02,412 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:02,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 20 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:29:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-23 12:29:02,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 37. [2021-11-23 12:29:02,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 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) [2021-11-23 12:29:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-11-23 12:29:02,427 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 17 [2021-11-23 12:29:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:02,428 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-11-23 12:29:02,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-11-23 12:29:02,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 12:29:02,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:02,430 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:02,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:29:02,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:29:02,652 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:02,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:02,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1541106392, now seen corresponding path program 1 times [2021-11-23 12:29:02,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:02,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757075934] [2021-11-23 12:29:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:02,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:02,663 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:29:02,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959552946] [2021-11-23 12:29:02,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:02,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:29:02,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:29:02,665 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:29:02,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:29:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:02,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 12:29:02,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:29:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:29:02,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:29:03,107 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:29:03,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:03,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757075934] [2021-11-23 12:29:03,109 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:29:03,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959552946] [2021-11-23 12:29:03,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959552946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:29:03,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:29:03,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-23 12:29:03,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416262814] [2021-11-23 12:29:03,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:29:03,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 12:29:03,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:03,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 12:29:03,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-11-23 12:29:03,117 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2021-11-23 12:29:03,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:03,524 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2021-11-23 12:29:03,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 12:29:03,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) Word has length 24 [2021-11-23 12:29:03,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:03,526 INFO L225 Difference]: With dead ends: 120 [2021-11-23 12:29:03,527 INFO L226 Difference]: Without dead ends: 86 [2021-11-23 12:29:03,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-11-23 12:29:03,529 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 178 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:03,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 60 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:29:03,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-23 12:29:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2021-11-23 12:29:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 66 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:03,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2021-11-23 12:29:03,547 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 24 [2021-11-23 12:29:03,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:03,547 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2021-11-23 12:29:03,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2021-11-23 12:29:03,548 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2021-11-23 12:29:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 12:29:03,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:03,549 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:03,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:29:03,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:29:03,768 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:03,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:03,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1220021784, now seen corresponding path program 2 times [2021-11-23 12:29:03,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:03,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980028205] [2021-11-23 12:29:03,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:03,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:03,779 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:29:03,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548001684] [2021-11-23 12:29:03,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:29:03,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:29:03,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:29:03,781 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:29:03,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 12:29:03,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:29:03,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:29:03,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 12:29:03,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:29:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 12:29:04,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:29:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 12:29:04,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:04,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980028205] [2021-11-23 12:29:04,543 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:29:04,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548001684] [2021-11-23 12:29:04,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548001684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:29:04,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:29:04,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-11-23 12:29:04,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138309335] [2021-11-23 12:29:04,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:29:04,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 12:29:04,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:04,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 12:29:04,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-11-23 12:29:04,546 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:05,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:05,272 INFO L93 Difference]: Finished difference Result 234 states and 289 transitions. [2021-11-23 12:29:05,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 12:29:05,273 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 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 [2021-11-23 12:29:05,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:05,282 INFO L225 Difference]: With dead ends: 234 [2021-11-23 12:29:05,283 INFO L226 Difference]: Without dead ends: 170 [2021-11-23 12:29:05,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 12:29:05,290 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 370 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:05,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 109 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 12:29:05,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-23 12:29:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2021-11-23 12:29:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 126 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:05,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2021-11-23 12:29:05,320 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 36 [2021-11-23 12:29:05,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:05,320 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2021-11-23 12:29:05,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:05,321 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2021-11-23 12:29:05,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 12:29:05,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:05,323 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:05,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:29:05,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:29:05,549 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:05,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:05,549 INFO L85 PathProgramCache]: Analyzing trace with hash -783303832, now seen corresponding path program 3 times [2021-11-23 12:29:05,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:05,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209711254] [2021-11-23 12:29:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:05,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:05,574 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:29:05,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228586620] [2021-11-23 12:29:05,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:29:05,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:29:05,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:29:05,580 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:29:05,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 12:29:05,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 12:29:05,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:29:05,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 12:29:05,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:29:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-11-23 12:29:05,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:29:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-11-23 12:29:06,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:06,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209711254] [2021-11-23 12:29:06,140 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:29:06,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228586620] [2021-11-23 12:29:06,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228586620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:29:06,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:29:06,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-23 12:29:06,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458498035] [2021-11-23 12:29:06,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:29:06,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:29:06,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:06,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:29:06,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:29:06,143 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:06,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:06,354 INFO L93 Difference]: Finished difference Result 590 states and 718 transitions. [2021-11-23 12:29:06,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:29:06,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 60 [2021-11-23 12:29:06,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:06,363 INFO L225 Difference]: With dead ends: 590 [2021-11-23 12:29:06,363 INFO L226 Difference]: Without dead ends: 491 [2021-11-23 12:29:06,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:29:06,373 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 144 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:06,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 34 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:29:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-11-23 12:29:06,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 277. [2021-11-23 12:29:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.1195652173913044) internal successors, (309), 276 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 309 transitions. [2021-11-23 12:29:06,468 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 309 transitions. Word has length 60 [2021-11-23 12:29:06,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:06,469 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 309 transitions. [2021-11-23 12:29:06,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:06,469 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 309 transitions. [2021-11-23 12:29:06,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-23 12:29:06,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:06,483 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:06,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:29:06,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:29:06,684 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:06,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:06,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2132288564, now seen corresponding path program 4 times [2021-11-23 12:29:06,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:06,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333583457] [2021-11-23 12:29:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:06,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:06,721 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:29:06,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841341298] [2021-11-23 12:29:06,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:29:06,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:29:06,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:29:06,725 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:29:06,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e662eb-9527-4765-bb89-f1046c0a9d94/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process