./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-non-constant-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_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/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_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/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_85f2a169-7e0b-4aa0-9a71-48648b086ffe/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 4fa401c700a21fa1f98a1481c8e8ba1555a45c0429555dc041a1c04ce1059991 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:55:17,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:55:17,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:55:17,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:55:17,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:55:17,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:55:17,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:55:17,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:55:17,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:55:17,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:55:17,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:55:17,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:55:17,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:55:17,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:55:17,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:55:17,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:55:17,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:55:17,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:55:17,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:55:17,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:55:17,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:55:17,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:55:17,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:55:17,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:55:17,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:55:17,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:55:17,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:55:17,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:55:17,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:55:17,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:55:17,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:55:17,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:55:17,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:55:17,445 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:55:17,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:55:17,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:55:17,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:55:17,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:55:17,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:55:17,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:55:17,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:55:17,455 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:55:17,484 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:55:17,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:55:17,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:55:17,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:55:17,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:55:17,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:55:17,487 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:55:17,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:55:17,487 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:55:17,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:55:17,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:55:17,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:55:17,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:55:17,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:55:17,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:55:17,489 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:55:17,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:55:17,490 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:55:17,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:55:17,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:55:17,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:55:17,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:55:17,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:55:17,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:55:17,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:55:17,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:55:17,492 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:55:17,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:55:17,492 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:55:17,493 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:55:17,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:55:17,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:55:17,493 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_85f2a169-7e0b-4aa0-9a71-48648b086ffe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fa401c700a21fa1f98a1481c8e8ba1555a45c0429555dc041a1c04ce1059991 [2021-11-23 12:55:17,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:55:17,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:55:17,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:55:17,839 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:55:17,840 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:55:17,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2021-11-23 12:55:17,924 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/data/872b3dd50/92c2a635b0e34d6e91d1f157f2b20c47/FLAGa5abd0bf7 [2021-11-23 12:55:18,428 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:55:18,429 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2021-11-23 12:55:18,442 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/data/872b3dd50/92c2a635b0e34d6e91d1f157f2b20c47/FLAGa5abd0bf7 [2021-11-23 12:55:18,765 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/data/872b3dd50/92c2a635b0e34d6e91d1f157f2b20c47 [2021-11-23 12:55:18,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:55:18,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:55:18,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:55:18,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:55:18,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:55:18,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:55:18" (1/1) ... [2021-11-23 12:55:18,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@184f5b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:18, skipping insertion in model container [2021-11-23 12:55:18,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:55:18" (1/1) ... [2021-11-23 12:55:18,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:55:18,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:55:19,000 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_85f2a169-7e0b-4aa0-9a71-48648b086ffe/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c[421,434] [2021-11-23 12:55:19,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:55:19,029 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:55:19,058 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_85f2a169-7e0b-4aa0-9a71-48648b086ffe/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c[421,434] [2021-11-23 12:55:19,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:55:19,111 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:55:19,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:19 WrapperNode [2021-11-23 12:55:19,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:55:19,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:55:19,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:55:19,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:55:19,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:19" (1/1) ... [2021-11-23 12:55:19,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:19" (1/1) ... [2021-11-23 12:55:19,166 INFO L137 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2021-11-23 12:55:19,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:55:19,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:55:19,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:55:19,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:55:19,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:19" (1/1) ... [2021-11-23 12:55:19,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:19" (1/1) ... [2021-11-23 12:55:19,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:19" (1/1) ... [2021-11-23 12:55:19,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:19" (1/1) ... [2021-11-23 12:55:19,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:19" (1/1) ... [2021-11-23 12:55:19,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:19" (1/1) ... [2021-11-23 12:55:19,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:19" (1/1) ... [2021-11-23 12:55:19,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:55:19,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:55:19,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:55:19,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:55:19,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:19" (1/1) ... [2021-11-23 12:55:19,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:55:19,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:19,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:55:19,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:55:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:55:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:55:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:55:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 12:55:19,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:55:19,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:55:19,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:55:19,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:55:19,392 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:55:19,394 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:55:19,533 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:55:19,541 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:55:19,542 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 12:55:19,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:55:19 BoogieIcfgContainer [2021-11-23 12:55:19,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:55:19,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:55:19,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:55:19,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:55:19,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:55:18" (1/3) ... [2021-11-23 12:55:19,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4356c8d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:55:19, skipping insertion in model container [2021-11-23 12:55:19,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:19" (2/3) ... [2021-11-23 12:55:19,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4356c8d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:55:19, skipping insertion in model container [2021-11-23 12:55:19,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:55:19" (3/3) ... [2021-11-23 12:55:19,556 INFO L111 eAbstractionObserver]: Analyzing ICFG init-non-constant-2-n-u.c [2021-11-23 12:55:19,563 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:55:19,563 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 12:55:19,647 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:55:19,656 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 12:55:19,656 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 12:55:19,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 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 12:55:19,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 12:55:19,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:19,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:19,680 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:19,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1790754985, now seen corresponding path program 1 times [2021-11-23 12:55:19,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:19,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774909107] [2021-11-23 12:55:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:19,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:19,828 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:55:19,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323846897] [2021-11-23 12:55:19,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:19,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:19,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:19,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:19,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:55:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:19,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 12:55:19,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:20,004 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 12:55:20,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:55:20,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:20,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774909107] [2021-11-23 12:55:20,006 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:55:20,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323846897] [2021-11-23 12:55:20,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323846897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:55:20,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:55:20,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:55:20,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342529596] [2021-11-23 12:55:20,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:55:20,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 12:55:20,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:20,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 12:55:20,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:55:20,078 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:20,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:20,105 INFO L93 Difference]: Finished difference Result 39 states and 58 transitions. [2021-11-23 12:55:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 12:55:20,111 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 12:55:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:20,120 INFO L225 Difference]: With dead ends: 39 [2021-11-23 12:55:20,120 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 12:55:20,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:55:20,135 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:20,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:55:20,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 12:55:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 12:55:20,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 12:55:20,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-23 12:55:20,195 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2021-11-23 12:55:20,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:20,195 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-23 12:55:20,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:20,197 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-23 12:55:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 12:55:20,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:20,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:20,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:20,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-23 12:55:20,424 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:20,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:20,425 INFO L85 PathProgramCache]: Analyzing trace with hash 588381349, now seen corresponding path program 1 times [2021-11-23 12:55:20,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:20,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632898519] [2021-11-23 12:55:20,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:20,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:20,443 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:55:20,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940454509] [2021-11-23 12:55:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:20,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:20,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:20,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:20,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:55:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:20,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 12:55:20,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:20,618 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 12:55:20,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:55:20,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:20,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632898519] [2021-11-23 12:55:20,620 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:55:20,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940454509] [2021-11-23 12:55:20,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940454509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:55:20,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:55:20,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:55:20,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140285153] [2021-11-23 12:55:20,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:55:20,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:55:20,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:20,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:55:20,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:55:20,624 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:20,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:20,683 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-11-23 12:55:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:55:20,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 12:55:20,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:20,685 INFO L225 Difference]: With dead ends: 36 [2021-11-23 12:55:20,686 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 12:55:20,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:55:20,688 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:20,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 32 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:55:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 12:55:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2021-11-23 12:55:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-23 12:55:20,695 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-11-23 12:55:20,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:20,696 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-23 12:55:20,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:20,697 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-23 12:55:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 12:55:20,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:20,698 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:20,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:20,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:20,924 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:20,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:20,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1407381398, now seen corresponding path program 1 times [2021-11-23 12:55:20,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:20,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92374398] [2021-11-23 12:55:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:20,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:20,934 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:55:20,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695683704] [2021-11-23 12:55:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:20,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:20,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:20,943 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:20,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:55:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:20,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 12:55:21,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:21,091 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 12:55:21,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:55:21,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:21,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92374398] [2021-11-23 12:55:21,092 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:55:21,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695683704] [2021-11-23 12:55:21,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695683704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:55:21,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:55:21,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:55:21,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880784174] [2021-11-23 12:55:21,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:55:21,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:55:21,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:21,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:55:21,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:55:21,095 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 12:55:21,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:21,212 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-11-23 12:55:21,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:55:21,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 12:55:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:21,215 INFO L225 Difference]: With dead ends: 48 [2021-11-23 12:55:21,215 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 12:55:21,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:55:21,217 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:21,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 50 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:55:21,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 12:55:21,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-11-23 12:55:21,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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 12:55:21,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-23 12:55:21,229 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2021-11-23 12:55:21,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:21,230 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-23 12:55:21,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 12:55:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-23 12:55:21,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 12:55:21,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:21,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:21,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:21,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:21,460 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:21,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:21,461 INFO L85 PathProgramCache]: Analyzing trace with hash -632601900, now seen corresponding path program 1 times [2021-11-23 12:55:21,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:21,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848622672] [2021-11-23 12:55:21,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:21,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:21,469 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:55:21,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827502492] [2021-11-23 12:55:21,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:21,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:21,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:21,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:21,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:55:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:21,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 12:55:21,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:21,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 12:55:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:21,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:22,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-11-23 12:55:22,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2021-11-23 12:55:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:22,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:22,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848622672] [2021-11-23 12:55:22,548 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:55:22,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827502492] [2021-11-23 12:55:22,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827502492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:22,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:55:22,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-23 12:55:22,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582858955] [2021-11-23 12:55:22,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:22,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 12:55:22,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:22,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 12:55:22,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:55:22,552 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:22,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:22,744 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-11-23 12:55:22,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 12:55:22,745 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 12:55:22,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:22,747 INFO L225 Difference]: With dead ends: 58 [2021-11-23 12:55:22,747 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 12:55:22,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-11-23 12:55:22,749 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:22,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 109 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 105 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2021-11-23 12:55:22,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 12:55:22,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 28. [2021-11-23 12:55:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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 12:55:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-23 12:55:22,758 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2021-11-23 12:55:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:22,759 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-23 12:55:22,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-23 12:55:22,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 12:55:22,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:22,764 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:22,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:22,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:22,979 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:22,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:22,980 INFO L85 PathProgramCache]: Analyzing trace with hash 478147977, now seen corresponding path program 1 times [2021-11-23 12:55:22,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:22,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497247819] [2021-11-23 12:55:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:22,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:22,987 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:55:22,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607346633] [2021-11-23 12:55:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:22,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:22,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:22,989 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:22,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:55:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:23,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:55:23,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:23,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:23,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:23,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497247819] [2021-11-23 12:55:23,199 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:55:23,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607346633] [2021-11-23 12:55:23,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607346633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:23,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:55:23,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 12:55:23,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431359341] [2021-11-23 12:55:23,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:23,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 12:55:23,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:23,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 12:55:23,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:55:23,201 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 12:55:23,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:23,354 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-11-23 12:55:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:55:23,355 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 12:55:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:23,357 INFO L225 Difference]: With dead ends: 78 [2021-11-23 12:55:23,357 INFO L226 Difference]: Without dead ends: 65 [2021-11-23 12:55:23,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:55:23,361 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:23,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 78 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:55:23,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-23 12:55:23,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2021-11-23 12:55:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 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 12:55:23,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2021-11-23 12:55:23,395 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 19 [2021-11-23 12:55:23,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:23,396 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2021-11-23 12:55:23,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 12:55:23,396 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2021-11-23 12:55:23,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 12:55:23,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:23,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:23,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:23,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:23,616 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:23,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:23,616 INFO L85 PathProgramCache]: Analyzing trace with hash 705157507, now seen corresponding path program 2 times [2021-11-23 12:55:23,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:23,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384433179] [2021-11-23 12:55:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:23,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:23,623 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:55:23,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308287990] [2021-11-23 12:55:23,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:55:23,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:23,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:23,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:23,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 12:55:23,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:55:23,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:23,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 12:55:23,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:23,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 12:55:23,917 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-11-23 12:55:23,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2021-11-23 12:55:24,326 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 12:55:24,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 57 [2021-11-23 12:55:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:24,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:38,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2021-11-23 12:55:38,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 268 [2021-11-23 12:55:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:46,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:46,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384433179] [2021-11-23 12:55:46,711 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:55:46,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308287990] [2021-11-23 12:55:46,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308287990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:46,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:55:46,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-23 12:55:46,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278674509] [2021-11-23 12:55:46,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:46,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 12:55:46,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:46,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 12:55:46,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=314, Unknown=8, NotChecked=0, Total=420 [2021-11-23 12:55:46,715 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:02,398 WARN L227 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 12:56:37,964 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 12:56:49,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:49,114 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2021-11-23 12:56:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 12:56:49,115 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 12:56:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:49,116 INFO L225 Difference]: With dead ends: 115 [2021-11-23 12:56:49,117 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 12:56:49,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 78.3s TimeCoverageRelationStatistics Valid=412, Invalid=1365, Unknown=29, NotChecked=0, Total=1806 [2021-11-23 12:56:49,119 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:49,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 122 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 183 Invalid, 0 Unknown, 248 Unchecked, 1.1s Time] [2021-11-23 12:56:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 12:56:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 60. [2021-11-23 12:56:49,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 states have internal predecessors, (75), 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 12:56:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2021-11-23 12:56:49,134 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 20 [2021-11-23 12:56:49,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:49,134 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2021-11-23 12:56:49,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2021-11-23 12:56:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 12:56:49,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:49,136 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:56:49,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:56:49,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:56:49,337 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:56:49,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:49,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1007650361, now seen corresponding path program 2 times [2021-11-23 12:56:49,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:56:49,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782518859] [2021-11-23 12:56:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:49,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:56:49,361 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:56:49,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821037178] [2021-11-23 12:56:49,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:56:49,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:56:49,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:56:49,364 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:56:49,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 12:56:49,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:56:49,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:56:49,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 12:56:49,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:49,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 12:56:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:49,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:49,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2021-11-23 12:56:49,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2021-11-23 12:56:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:50,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:56:50,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782518859] [2021-11-23 12:56:50,648 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:56:50,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821037178] [2021-11-23 12:56:50,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821037178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:56:50,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:56:50,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-23 12:56:50,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195868032] [2021-11-23 12:56:50,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:56:50,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 12:56:50,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:56:50,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 12:56:50,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-23 12:56:50,651 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:51,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:51,431 INFO L93 Difference]: Finished difference Result 121 states and 148 transitions. [2021-11-23 12:56:51,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 12:56:51,432 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 12:56:51,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:51,433 INFO L225 Difference]: With dead ends: 121 [2021-11-23 12:56:51,434 INFO L226 Difference]: Without dead ends: 119 [2021-11-23 12:56:51,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-11-23 12:56:51,435 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 90 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:51,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 139 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 206 Invalid, 0 Unknown, 39 Unchecked, 0.7s Time] [2021-11-23 12:56:51,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-23 12:56:51,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 70. [2021-11-23 12:56:51,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 69 states have internal predecessors, (88), 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 12:56:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2021-11-23 12:56:51,453 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 20 [2021-11-23 12:56:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:51,453 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2021-11-23 12:56:51,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2021-11-23 12:56:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 12:56:51,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:51,455 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:56:51,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:56:51,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:56:51,660 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:56:51,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:51,660 INFO L85 PathProgramCache]: Analyzing trace with hash 177241417, now seen corresponding path program 3 times [2021-11-23 12:56:51,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:56:51,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118416610] [2021-11-23 12:56:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:51,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:56:51,667 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:56:51,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083758754] [2021-11-23 12:56:51,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:56:51,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:56:51,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:56:51,672 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:56:51,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 12:56:51,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 12:56:51,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:56:51,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 12:56:51,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:51,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:56:52,002 INFO L354 Elim1Store]: treesize reduction 55, result has 20.3 percent of original size [2021-11-23 12:56:52,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-11-23 12:56:52,598 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-23 12:56:52,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 46 [2021-11-23 12:56:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:52,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:54,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 137 [2021-11-23 12:56:54,355 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 12:56:54,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 304 treesize of output 298 [2021-11-23 12:57:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:06,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:57:06,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118416610] [2021-11-23 12:57:06,302 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:57:06,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083758754] [2021-11-23 12:57:06,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083758754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:57:06,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:57:06,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-11-23 12:57:06,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647902457] [2021-11-23 12:57:06,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:57:06,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 12:57:06,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:57:06,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 12:57:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-11-23 12:57:06,305 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 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 12:57:17,659 WARN L227 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 121 DAG size of output: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 12:57:33,126 WARN L227 SmtUtils]: Spent 6.01s on a formula simplification. DAG size of input: 124 DAG size of output: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 12:58:33,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:58:33,031 INFO L93 Difference]: Finished difference Result 201 states and 247 transitions. [2021-11-23 12:58:33,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-23 12:58:33,032 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 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 21 [2021-11-23 12:58:33,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:58:33,037 INFO L225 Difference]: With dead ends: 201 [2021-11-23 12:58:33,038 INFO L226 Difference]: Without dead ends: 184 [2021-11-23 12:58:33,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 82.0s TimeCoverageRelationStatistics Valid=1150, Invalid=4106, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 12:58:33,042 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 191 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:58:33,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 171 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 518 Invalid, 0 Unknown, 53 Unchecked, 9.7s Time] [2021-11-23 12:58:33,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-23 12:58:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 88. [2021-11-23 12:58:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 87 states have internal predecessors, (113), 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 12:58:33,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2021-11-23 12:58:33,086 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 21 [2021-11-23 12:58:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:58:33,087 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2021-11-23 12:58:33,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 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 12:58:33,087 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2021-11-23 12:58:33,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 12:58:33,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:58:33,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:58:33,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:58:33,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:33,297 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:58:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:58:33,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1946671471, now seen corresponding path program 1 times [2021-11-23 12:58:33,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:58:33,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177173927] [2021-11-23 12:58:33,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:58:33,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:58:33,303 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:58:33,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847192684] [2021-11-23 12:58:33,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:58:33,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:33,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:58:33,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:58:33,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 12:58:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:58:33,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:58:33,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:58:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:58:33,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:58:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:58:33,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:58:33,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177173927] [2021-11-23 12:58:33,560 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:58:33,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847192684] [2021-11-23 12:58:33,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847192684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:58:33,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:58:33,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 12:58:33,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951799058] [2021-11-23 12:58:33,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:58:33,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 12:58:33,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:58:33,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 12:58:33,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:58:33,563 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 12:58:33,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:58:33,704 INFO L93 Difference]: Finished difference Result 160 states and 200 transitions. [2021-11-23 12:58:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:58:33,705 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 22 [2021-11-23 12:58:33,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:58:33,711 INFO L225 Difference]: With dead ends: 160 [2021-11-23 12:58:33,711 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 12:58:33,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:58:33,712 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:58:33,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 65 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:58:33,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 12:58:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 82. [2021-11-23 12:58:33,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 81 states have internal predecessors, (104), 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 12:58:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2021-11-23 12:58:33,738 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 22 [2021-11-23 12:58:33,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:58:33,739 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2021-11-23 12:58:33,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 12:58:33,740 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2021-11-23 12:58:33,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 12:58:33,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:58:33,741 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:58:33,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:58:33,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 12:58:33,956 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:58:33,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:58:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1445200709, now seen corresponding path program 3 times [2021-11-23 12:58:33,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:58:33,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7821826] [2021-11-23 12:58:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:58:33,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:58:33,963 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:58:33,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243551690] [2021-11-23 12:58:33,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:58:33,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:33,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:58:33,968 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:58:33,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 12:58:34,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 12:58:34,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:58:34,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 12:58:34,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:58:34,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:58:34,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:58:34,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 12:58:34,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:58:34,359 INFO L354 Elim1Store]: treesize reduction 62, result has 39.8 percent of original size [2021-11-23 12:58:34,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 70 [2021-11-23 12:58:34,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:58:34,562 INFO L354 Elim1Store]: treesize reduction 161, result has 26.5 percent of original size [2021-11-23 12:58:34,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 122 [2021-11-23 12:58:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:58:37,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:58:52,882 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_75| Int) (|v_ULTIMATE.start_main_~i~0#1_43| Int)) (or (= (mod (select (let ((.cse0 (* |c_ULTIMATE.start_main_~n~0#1| 4))) (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_43| .cse0)) (.cse2 (* |v_ULTIMATE.start_main_~j~0#1_75| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| .cse0) (* |c_ULTIMATE.start_main_~j~0#1| 4)) (+ |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~j~0#1|)) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse1 .cse2) (+ |c_ULTIMATE.start_main_~C~0#1| |v_ULTIMATE.start_main_~i~0#1_43| |v_ULTIMATE.start_main_~j~0#1_75|)) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse1 4 .cse2) (+ |c_ULTIMATE.start_main_~C~0#1| |v_ULTIMATE.start_main_~i~0#1_43| |v_ULTIMATE.start_main_~j~0#1_75| 1)))) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) (mod |c_ULTIMATE.start_main_~C~0#1| 4294967296)) (<= (+ |v_ULTIMATE.start_main_~i~0#1_43| 1) 0) (<= (+ |v_ULTIMATE.start_main_~j~0#1_75| 2) |c_ULTIMATE.start_main_~j~0#1|))) is different from false [2021-11-23 12:58:52,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 104 [2021-11-23 12:58:52,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4832 treesize of output 4816 [2021-11-23 13:02:25,233 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_43| Int)) (or (let ((.cse6 (* 4 (* |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (.cse7 (* 4 |c_ULTIMATE.start_main_~j~0#1|))) (let ((.cse8 (= (+ .cse6 4 .cse7) 0))) (and (or (forall ((|aux_mod_aux_mod_ULTIMATE.start_main_~C~0#1_45_167| Int) (|aux_div_aux_mod_ULTIMATE.start_main_~C~0#1_45_167| Int)) (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_43| |c_ULTIMATE.start_main_~n~0#1|)) (.cse2 (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~C~0#1_45_167|))) (let ((.cse0 (+ .cse1 |aux_mod_aux_mod_ULTIMATE.start_main_~C~0#1_45_167| .cse2))) (or (<= (+ |v_ULTIMATE.start_main_~i~0#1_43| 4294967296) .cse0) (= |v_ULTIMATE.start_main_~i~0#1_43| (+ .cse1 .cse2)) (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~C~0#1_45_167|) (< .cse0 |v_ULTIMATE.start_main_~i~0#1_43|) (< |aux_mod_aux_mod_ULTIMATE.start_main_~C~0#1_45_167| 0))))) (<= 1 (+ (* |v_ULTIMATE.start_main_~i~0#1_43| |c_ULTIMATE.start_main_~n~0#1|) |c_ULTIMATE.start_main_~j~0#1|))) (or (and (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~C~0#1_45_118| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~C~0#1_45_118| Int)) (let ((.cse5 (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~C~0#1_45_118|))) (let ((.cse4 (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~j~0#1|)) (.cse3 (+ .cse5 |aux_mod_aux_mod_ULTIMATE.start_main_~C~0#1_45_118|))) (or (< .cse3 .cse4) (= .cse4 .cse5) (<= (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~j~0#1| 4294967296) .cse3) (< |aux_mod_aux_mod_ULTIMATE.start_main_~C~0#1_45_118| 0) (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~C~0#1_45_118|))))) (= (+ .cse6 .cse7) 0)) .cse8) (or (not .cse8) (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~C~0#1_45_120| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~C~0#1_45_120| Int)) (let ((.cse11 (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~C~0#1_45_120|))) (let ((.cse10 (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~j~0#1| 1)) (.cse9 (+ .cse11 |aux_mod_aux_mod_ULTIMATE.start_main_~C~0#1_45_120|))) (or (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~C~0#1_45_120|) (< .cse9 .cse10) (= .cse11 .cse10) (< |aux_mod_aux_mod_ULTIMATE.start_main_~C~0#1_45_120| 0) (<= (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~j~0#1| 4294967297) .cse9))))))))) (<= (+ |v_ULTIMATE.start_main_~i~0#1_43| 1) 0))) is different from false [2021-11-23 13:02:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 9 not checked. [2021-11-23 13:02:33,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:02:33,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7821826] [2021-11-23 13:02:33,239 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:02:33,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243551690] [2021-11-23 13:02:33,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243551690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:02:33,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:02:33,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-11-23 13:02:33,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152404035] [2021-11-23 13:02:33,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:02:33,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 13:02:33,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:02:33,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 13:02:33,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=8, NotChecked=86, Total=600 [2021-11-23 13:02:33,243 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:02:45,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:02:45,757 INFO L93 Difference]: Finished difference Result 128 states and 162 transitions. [2021-11-23 13:02:45,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 13:02:45,757 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 13:02:45,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:02:45,759 INFO L225 Difference]: With dead ends: 128 [2021-11-23 13:02:45,759 INFO L226 Difference]: Without dead ends: 126 [2021-11-23 13:02:45,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=237, Invalid=880, Unknown=13, NotChecked=130, Total=1260 [2021-11-23 13:02:45,761 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:02:45,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 113 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 111 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2021-11-23 13:02:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-23 13:02:45,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2021-11-23 13:02:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.3010752688172043) internal successors, (121), 93 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:02:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 121 transitions. [2021-11-23 13:02:45,790 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 121 transitions. Word has length 22 [2021-11-23 13:02:45,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:02:45,790 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 121 transitions. [2021-11-23 13:02:45,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:02:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 121 transitions. [2021-11-23 13:02:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 13:02:45,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:02:45,793 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:02:45,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 13:02:46,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 13:02:46,008 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:02:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:02:46,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1380616778, now seen corresponding path program 4 times [2021-11-23 13:02:46,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:02:46,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092700135] [2021-11-23 13:02:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:02:46,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:02:46,012 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:02:46,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292440739] [2021-11-23 13:02:46,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:02:46,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:02:46,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:02:46,014 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:02:46,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 13:02:46,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:02:46,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:02:46,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:02:46,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:02:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:02:46,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:02:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:02:46,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:02:46,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092700135] [2021-11-23 13:02:46,247 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:02:46,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292440739] [2021-11-23 13:02:46,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292440739] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:02:46,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:02:46,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-23 13:02:46,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962154965] [2021-11-23 13:02:46,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:02:46,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 13:02:46,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:02:46,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 13:02:46,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:02:46,251 INFO L87 Difference]: Start difference. First operand 94 states and 121 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:02:46,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:02:46,484 INFO L93 Difference]: Finished difference Result 193 states and 239 transitions. [2021-11-23 13:02:46,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 13:02:46,485 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 23 [2021-11-23 13:02:46,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:02:46,486 INFO L225 Difference]: With dead ends: 193 [2021-11-23 13:02:46,486 INFO L226 Difference]: Without dead ends: 146 [2021-11-23 13:02:46,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-11-23 13:02:46,487 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 115 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:02:46,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 111 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:02:46,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-23 13:02:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 112. [2021-11-23 13:02:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2972972972972974) internal successors, (144), 111 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:02:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 144 transitions. [2021-11-23 13:02:46,514 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 144 transitions. Word has length 23 [2021-11-23 13:02:46,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:02:46,515 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 144 transitions. [2021-11-23 13:02:46,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:02:46,515 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 144 transitions. [2021-11-23 13:02:46,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 13:02:46,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:02:46,517 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:02:46,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 13:02:46,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 13:02:46,744 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:02:46,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:02:46,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1959865927, now seen corresponding path program 4 times [2021-11-23 13:02:46,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:02:46,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745720404] [2021-11-23 13:02:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:02:46,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:02:46,749 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:02:46,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260317863] [2021-11-23 13:02:46,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:02:46,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:02:46,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:02:46,755 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:02:46,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 13:02:46,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:02:46,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:02:46,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:02:46,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:02:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:02:46,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:02:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:02:46,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:02:46,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745720404] [2021-11-23 13:02:46,958 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:02:46,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260317863] [2021-11-23 13:02:46,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260317863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:02:46,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:02:46,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-23 13:02:46,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441845728] [2021-11-23 13:02:46,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:02:46,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 13:02:46,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:02:46,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 13:02:46,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:02:46,960 INFO L87 Difference]: Start difference. First operand 112 states and 144 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:02:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:02:47,121 INFO L93 Difference]: Finished difference Result 165 states and 201 transitions. [2021-11-23 13:02:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:02:47,121 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 13:02:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:02:47,123 INFO L225 Difference]: With dead ends: 165 [2021-11-23 13:02:47,123 INFO L226 Difference]: Without dead ends: 122 [2021-11-23 13:02:47,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-23 13:02:47,124 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 84 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:02:47,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 100 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:02:47,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-23 13:02:47,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2021-11-23 13:02:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 97 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:02:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2021-11-23 13:02:47,146 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 23 [2021-11-23 13:02:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:02:47,146 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2021-11-23 13:02:47,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:02:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2021-11-23 13:02:47,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 13:02:47,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:02:47,148 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:02:47,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 13:02:47,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 13:02:47,354 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:02:47,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:02:47,355 INFO L85 PathProgramCache]: Analyzing trace with hash -685450685, now seen corresponding path program 5 times [2021-11-23 13:02:47,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:02:47,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983037392] [2021-11-23 13:02:47,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:02:47,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:02:47,359 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:02:47,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982374185] [2021-11-23 13:02:47,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:02:47,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:02:47,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:02:47,361 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:02:47,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 13:02:47,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-23 13:02:47,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:02:47,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 13:02:47,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:02:47,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 13:02:47,521 INFO L354 Elim1Store]: treesize reduction 56, result has 18.8 percent of original size [2021-11-23 13:02:47,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2021-11-23 13:02:47,591 INFO L354 Elim1Store]: treesize reduction 142, result has 17.4 percent of original size [2021-11-23 13:02:47,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 68 [2021-11-23 13:02:47,859 INFO L354 Elim1Store]: treesize reduction 159, result has 28.7 percent of original size [2021-11-23 13:02:47,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 114 [2021-11-23 13:02:48,533 INFO L354 Elim1Store]: treesize reduction 300, result has 22.3 percent of original size [2021-11-23 13:02:48,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 135 treesize of output 177 [2021-11-23 13:02:51,286 INFO L354 Elim1Store]: treesize reduction 497, result has 17.9 percent of original size [2021-11-23 13:02:51,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 199 treesize of output 244 [2021-11-23 13:03:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:03:54,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:04:58,634 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_115| Int) (|v_ULTIMATE.start_main_~i~0#1_53| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_113| Int) (|v_ULTIMATE.start_main_~j~0#1_114| Int)) (or (= (mod (select (let ((.cse0 (* |c_ULTIMATE.start_main_~n~0#1| 4))) (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_53| .cse0))) (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| .cse0) (* |c_ULTIMATE.start_main_~j~0#1| 4)) (+ |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~j~0#1|)) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse1 (* |v_ULTIMATE.start_main_~j~0#1_115| 4)) (+ |v_ULTIMATE.start_main_~i~0#1_53| |v_ULTIMATE.start_main_~j~0#1_115| |c_ULTIMATE.start_main_~C~0#1|)) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse1 (* |v_ULTIMATE.start_main_~j~0#1_114| 4)) (+ |v_ULTIMATE.start_main_~i~0#1_53| |v_ULTIMATE.start_main_~j~0#1_114| |c_ULTIMATE.start_main_~C~0#1|)) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse1 (* |v_ULTIMATE.start_main_~j~0#1_113| 4)) (+ |v_ULTIMATE.start_main_~i~0#1_53| |v_ULTIMATE.start_main_~j~0#1_113| |c_ULTIMATE.start_main_~C~0#1|)))) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) (mod |c_ULTIMATE.start_main_~C~0#1| 4294967296)) (< |v_ULTIMATE.start_main_~j~0#1_113| (+ |v_ULTIMATE.start_main_~j~0#1_114| 1)) (< |v_ULTIMATE.start_main_~j~0#1_114| (+ |v_ULTIMATE.start_main_~j~0#1_115| 1)))) (< |v_ULTIMATE.start_main_~i~0#1_53| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< |v_ULTIMATE.start_main_~j~0#1_115| 0))) is different from false [2021-11-23 13:05:02,198 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_113| Int) (|v_ULTIMATE.start_main_~j~0#1_115| Int) (|v_ULTIMATE.start_main_~j~0#1_114| Int) (|v_ULTIMATE.start_main_~j~0#1_117| Int) (|v_ULTIMATE.start_main_~i~0#1_53| Int)) (or (= (mod |c_ULTIMATE.start_main_~C~0#1| 4294967296) (mod (select (let ((.cse1 (* |c_ULTIMATE.start_main_~n~0#1| 4))) (let ((.cse2 (* |v_ULTIMATE.start_main_~i~0#1_53| .cse1))) (store (store (store (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| .cse1))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse0 (* |c_ULTIMATE.start_main_~j~0#1| 4)) (+ |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~j~0#1|)) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_117| 4) .cse0) (+ |v_ULTIMATE.start_main_~j~0#1_117| |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1|))) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse2 (* |v_ULTIMATE.start_main_~j~0#1_115| 4)) (+ |v_ULTIMATE.start_main_~i~0#1_53| |v_ULTIMATE.start_main_~j~0#1_115| |c_ULTIMATE.start_main_~C~0#1|)) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse2 (* |v_ULTIMATE.start_main_~j~0#1_114| 4)) (+ |v_ULTIMATE.start_main_~i~0#1_53| |v_ULTIMATE.start_main_~j~0#1_114| |c_ULTIMATE.start_main_~C~0#1|)) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse2 (* |v_ULTIMATE.start_main_~j~0#1_113| 4)) (+ |v_ULTIMATE.start_main_~i~0#1_53| |v_ULTIMATE.start_main_~j~0#1_113| |c_ULTIMATE.start_main_~C~0#1|)))) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296)) (< |v_ULTIMATE.start_main_~j~0#1_117| (+ |c_ULTIMATE.start_main_~j~0#1| 1)) (< |v_ULTIMATE.start_main_~j~0#1_113| (+ |v_ULTIMATE.start_main_~j~0#1_114| 1)) (< |v_ULTIMATE.start_main_~j~0#1_114| (+ |v_ULTIMATE.start_main_~j~0#1_115| 1)) (< |v_ULTIMATE.start_main_~i~0#1_53| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< |v_ULTIMATE.start_main_~j~0#1_115| 0))) is different from false [2021-11-23 13:05:02,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 156 [2021-11-23 13:05:02,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4612 treesize of output 4608 [2021-11-23 13:05:11,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:05:11,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983037392] [2021-11-23 13:05:11,604 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:05:11,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982374185] [2021-11-23 13:05:11,605 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 13:05:11,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:05:11,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-23 13:05:11,605 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-23 13:05:11,605 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-23 13:05:11,611 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 13:05:11,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 13:05:11,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:05:11,816 INFO L732 BasicCegarLoop]: Path program histogram: [5, 4, 1, 1, 1, 1] [2021-11-23 13:05:11,818 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 13:05:11,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:05:11 BoogieIcfgContainer [2021-11-23 13:05:11,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 13:05:11,833 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 13:05:11,833 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 13:05:11,834 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 13:05:11,834 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:55:19" (3/4) ... [2021-11-23 13:05:11,837 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 13:05:11,837 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 13:05:11,837 INFO L158 Benchmark]: Toolchain (without parser) took 593065.54ms. Allocated memory was 81.8MB in the beginning and 180.4MB in the end (delta: 98.6MB). Free memory was 48.3MB in the beginning and 123.5MB in the end (delta: -75.2MB). Peak memory consumption was 22.6MB. Max. memory is 16.1GB. [2021-11-23 13:05:11,838 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 81.8MB. Free memory was 54.4MB in the beginning and 54.4MB in the end (delta: 28.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:05:11,838 INFO L158 Benchmark]: CACSL2BoogieTranslator took 336.51ms. Allocated memory was 81.8MB in the beginning and 102.8MB in the end (delta: 21.0MB). Free memory was 48.1MB in the beginning and 79.2MB in the end (delta: -31.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 13:05:11,839 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.09ms. Allocated memory is still 102.8MB. Free memory was 79.2MB in the beginning and 77.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:05:11,839 INFO L158 Benchmark]: Boogie Preprocessor took 59.58ms. Allocated memory is still 102.8MB. Free memory was 77.8MB in the beginning and 76.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:05:11,839 INFO L158 Benchmark]: RCFGBuilder took 316.32ms. Allocated memory is still 102.8MB. Free memory was 76.3MB in the beginning and 66.4MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 13:05:11,840 INFO L158 Benchmark]: TraceAbstraction took 592285.65ms. Allocated memory was 102.8MB in the beginning and 180.4MB in the end (delta: 77.6MB). Free memory was 65.8MB in the beginning and 123.5MB in the end (delta: -57.7MB). Peak memory consumption was 96.6MB. Max. memory is 16.1GB. [2021-11-23 13:05:11,840 INFO L158 Benchmark]: Witness Printer took 3.71ms. Allocated memory is still 180.4MB. Free memory is still 123.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:05:11,842 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 81.8MB. Free memory was 54.4MB in the beginning and 54.4MB in the end (delta: 28.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 336.51ms. Allocated memory was 81.8MB in the beginning and 102.8MB in the end (delta: 21.0MB). Free memory was 48.1MB in the beginning and 79.2MB in the end (delta: -31.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.09ms. Allocated memory is still 102.8MB. Free memory was 79.2MB in the beginning and 77.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.58ms. Allocated memory is still 102.8MB. Free memory was 77.8MB in the beginning and 76.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 316.32ms. Allocated memory is still 102.8MB. Free memory was 76.3MB in the beginning and 66.4MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 592285.65ms. Allocated memory was 102.8MB in the beginning and 180.4MB in the end (delta: 77.6MB). Free memory was 65.8MB in the beginning and 123.5MB in the end (delta: -57.7MB). Peak memory consumption was 96.6MB. Max. memory is 16.1GB. * Witness Printer took 3.71ms. Allocated memory is still 180.4MB. Free memory is still 123.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 10]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] int i,j; [L21] int m=1000,n=1500; [L22] int q,s; [L23] unsigned int A [m][n]; [L24] unsigned int C=__VERIFIER_nondet_uint(); [L26] q= __VERIFIER_nondet_int() [L27] s= __VERIFIER_nondet_int() [L29] i=0 [L30] j=0 [L31] CALL assume_abort_if_not(q main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/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 -> 4fa401c700a21fa1f98a1481c8e8ba1555a45c0429555dc041a1c04ce1059991 [2021-11-23 13:05:14,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:05:15,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:05:15,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:05:15,026 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:05:15,027 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:05:15,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2021-11-23 13:05:15,112 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/data/5242b681a/f89e82a455874202950991300aef75c4/FLAG94d75eae7 [2021-11-23 13:05:15,605 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:05:15,606 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2021-11-23 13:05:15,615 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/data/5242b681a/f89e82a455874202950991300aef75c4/FLAG94d75eae7 [2021-11-23 13:05:15,980 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/data/5242b681a/f89e82a455874202950991300aef75c4 [2021-11-23 13:05:15,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:05:15,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:05:15,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:05:15,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:05:15,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:05:15,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:05:15" (1/1) ... [2021-11-23 13:05:15,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b4957f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:05:15, skipping insertion in model container [2021-11-23 13:05:15,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:05:15" (1/1) ... [2021-11-23 13:05:16,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:05:16,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:05:16,185 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_85f2a169-7e0b-4aa0-9a71-48648b086ffe/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c[421,434] [2021-11-23 13:05:16,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:05:16,214 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:05:16,227 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_85f2a169-7e0b-4aa0-9a71-48648b086ffe/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c[421,434] [2021-11-23 13:05:16,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:05:16,266 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:05:16,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:05:16 WrapperNode [2021-11-23 13:05:16,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:05:16,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:05:16,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:05:16,268 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:05:16,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:05:16" (1/1) ... [2021-11-23 13:05:16,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:05:16" (1/1) ... [2021-11-23 13:05:16,333 INFO L137 Inliner]: procedures = 18, calls = 15, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2021-11-23 13:05:16,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:05:16,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:05:16,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:05:16,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:05:16,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:05:16" (1/1) ... [2021-11-23 13:05:16,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:05:16" (1/1) ... [2021-11-23 13:05:16,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:05:16" (1/1) ... [2021-11-23 13:05:16,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:05:16" (1/1) ... [2021-11-23 13:05:16,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:05:16" (1/1) ... [2021-11-23 13:05:16,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:05:16" (1/1) ... [2021-11-23 13:05:16,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:05:16" (1/1) ... [2021-11-23 13:05:16,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:05:16,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:05:16,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:05:16,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:05:16,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:05:16" (1/1) ... [2021-11-23 13:05:16,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:05:16,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:05:16,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:05:16,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:05:16,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:05:16,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 13:05:16,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:05:16,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 13:05:16,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:05:16,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:05:16,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:05:16,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 13:05:16,577 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:05:16,578 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:05:16,769 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:05:16,778 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:05:16,779 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 13:05:16,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:05:16 BoogieIcfgContainer [2021-11-23 13:05:16,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:05:16,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:05:16,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:05:16,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:05:16,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:05:15" (1/3) ... [2021-11-23 13:05:16,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e32848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:05:16, skipping insertion in model container [2021-11-23 13:05:16,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:05:16" (2/3) ... [2021-11-23 13:05:16,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e32848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:05:16, skipping insertion in model container [2021-11-23 13:05:16,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:05:16" (3/3) ... [2021-11-23 13:05:16,817 INFO L111 eAbstractionObserver]: Analyzing ICFG init-non-constant-2-n-u.c [2021-11-23 13:05:16,823 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:05:16,823 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:05:16,919 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:05:16,926 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 13:05:16,939 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:05:16,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:16,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 13:05:16,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:05:16,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:05:16,962 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:05:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:05:16,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1790754985, now seen corresponding path program 1 times [2021-11-23 13:05:16,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:05:16,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74814272] [2021-11-23 13:05:16,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:05:16,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:05:16,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:05:16,996 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:05:17,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 13:05:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:05:17,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 13:05:17,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:05:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:05:17,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:05:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:05:17,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:05:17,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74814272] [2021-11-23 13:05:17,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74814272] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:05:17,244 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:05:17,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 13:05:17,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900498873] [2021-11-23 13:05:17,248 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:05:17,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:05:17,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:05:17,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:05:17,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:05:17,294 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:17,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:05:17,315 INFO L93 Difference]: Finished difference Result 39 states and 58 transitions. [2021-11-23 13:05:17,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:05:17,318 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 13:05:17,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:05:17,326 INFO L225 Difference]: With dead ends: 39 [2021-11-23 13:05:17,327 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 13:05:17,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:05:17,335 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:05:17,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:05:17,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 13:05:17,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 13:05:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-23 13:05:17,373 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2021-11-23 13:05:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:05:17,374 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-23 13:05:17,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:17,375 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-23 13:05:17,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 13:05:17,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:05:17,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:05:17,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:05:17,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:05:17,588 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:05:17,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:05:17,589 INFO L85 PathProgramCache]: Analyzing trace with hash 588381349, now seen corresponding path program 1 times [2021-11-23 13:05:17,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:05:17,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123137769] [2021-11-23 13:05:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:05:17,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:05:17,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:05:17,593 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:05:17,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 13:05:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:05:17,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:05:17,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:05:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:05:17,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:05:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:05:18,031 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:05:18,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123137769] [2021-11-23 13:05:18,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123137769] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:05:18,032 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:05:18,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-23 13:05:18,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057873084] [2021-11-23 13:05:18,033 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:05:18,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:05:18,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:05:18,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:05:18,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:05:18,036 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:05:18,223 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-11-23 13:05:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:05:18,224 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 13:05:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:05:18,225 INFO L225 Difference]: With dead ends: 30 [2021-11-23 13:05:18,225 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 13:05:18,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:05:18,227 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:05:18,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 51 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:05:18,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 13:05:18,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-11-23 13:05:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-23 13:05:18,233 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-11-23 13:05:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:05:18,233 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-23 13:05:18,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:18,234 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-23 13:05:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 13:05:18,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:05:18,235 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:05:18,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:05:18,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:05:18,447 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:05:18,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:05:18,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1407381398, now seen corresponding path program 1 times [2021-11-23 13:05:18,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:05:18,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543441714] [2021-11-23 13:05:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:05:18,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:05:18,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:05:18,450 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:05:18,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 13:05:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:05:18,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:05:18,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:05:18,708 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 13:05:18,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:05:18,800 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 13:05:18,800 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:05:18,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543441714] [2021-11-23 13:05:18,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543441714] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:05:18,802 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:05:18,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 5] imperfect sequences [] total 10 [2021-11-23 13:05:18,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438759050] [2021-11-23 13:05:18,806 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:05:18,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:05:18,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:05:18,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:05:18,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:05:18,812 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:19,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:05:19,256 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-11-23 13:05:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:05:19,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 13:05:19,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:05:19,258 INFO L225 Difference]: With dead ends: 43 [2021-11-23 13:05:19,258 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 13:05:19,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:05:19,260 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 99 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:05:19,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 51 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:05:19,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 13:05:19,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-11-23 13:05:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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 13:05:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-23 13:05:19,272 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2021-11-23 13:05:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:05:19,272 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-23 13:05:19,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:19,274 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-23 13:05:19,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 13:05:19,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:05:19,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:05:19,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 13:05:19,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:05:19,486 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:05:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:05:19,487 INFO L85 PathProgramCache]: Analyzing trace with hash -632601900, now seen corresponding path program 1 times [2021-11-23 13:05:19,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:05:19,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474660584] [2021-11-23 13:05:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:05:19,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:05:19,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:05:19,494 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:05:19,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 13:05:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:05:19,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 13:05:19,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:05:19,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 13:05:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:05:19,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:05:20,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 13:05:20,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-11-23 13:05:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:05:21,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:05:21,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474660584] [2021-11-23 13:05:21,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474660584] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:05:21,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:05:21,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-23 13:05:21,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140032262] [2021-11-23 13:05:21,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:05:21,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 13:05:21,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:05:21,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 13:05:21,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:05:21,143 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 13:05:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:05:21,973 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-11-23 13:05:21,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 13:05:21,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 16 [2021-11-23 13:05:21,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:05:21,977 INFO L225 Difference]: With dead ends: 64 [2021-11-23 13:05:21,978 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 13:05:21,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-11-23 13:05:21,980 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:05:21,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 108 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 13:05:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 13:05:21,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 28. [2021-11-23 13:05:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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 13:05:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-23 13:05:21,991 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2021-11-23 13:05:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:05:21,992 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-23 13:05:21,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 13:05:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-23 13:05:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 13:05:21,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:05:21,993 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:05:22,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-23 13:05:22,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:05:22,205 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:05:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:05:22,206 INFO L85 PathProgramCache]: Analyzing trace with hash 552425302, now seen corresponding path program 2 times [2021-11-23 13:05:22,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:05:22,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703006803] [2021-11-23 13:05:22,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:05:22,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:05:22,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:05:22,212 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:05:22,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 13:05:22,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:05:22,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:05:22,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 13:05:22,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:05:22,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 13:05:22,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:05:22,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 13:05:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:05:22,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:05:23,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-11-23 13:05:23,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 252 treesize of output 248 [2021-11-23 13:05:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:05:25,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:05:25,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703006803] [2021-11-23 13:05:25,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703006803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:05:25,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:05:25,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-23 13:05:25,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679222507] [2021-11-23 13:05:25,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:05:25,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 13:05:25,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:05:25,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 13:05:25,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-23 13:05:25,402 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:33,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:05:39,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:05:39,192 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2021-11-23 13:05:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 13:05:39,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 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 13:05:39,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:05:39,220 INFO L225 Difference]: With dead ends: 107 [2021-11-23 13:05:39,220 INFO L226 Difference]: Without dead ends: 105 [2021-11-23 13:05:39,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 13:05:39,221 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 120 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 84 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:05:39,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 166 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 299 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 13:05:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-23 13:05:39,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 38. [2021-11-23 13:05:39,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:39,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-11-23 13:05:39,241 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 17 [2021-11-23 13:05:39,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:05:39,241 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-11-23 13:05:39,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:39,241 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-11-23 13:05:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 13:05:39,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:05:39,242 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:05:39,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:05:39,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:05:39,443 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:05:39,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:05:39,443 INFO L85 PathProgramCache]: Analyzing trace with hash 478147977, now seen corresponding path program 1 times [2021-11-23 13:05:39,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:05:39,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157981667] [2021-11-23 13:05:39,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:05:39,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:05:39,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:05:39,445 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:05:39,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 13:05:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:05:39,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 13:05:39,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:05:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:05:39,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:05:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:05:39,934 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:05:39,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157981667] [2021-11-23 13:05:39,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157981667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:05:39,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:05:39,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-11-23 13:05:39,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348863163] [2021-11-23 13:05:39,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:05:39,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 13:05:39,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:05:39,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 13:05:39,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:05:39,937 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:40,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:05:40,799 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2021-11-23 13:05:40,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 13:05:40,800 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 13:05:40,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:05:40,801 INFO L225 Difference]: With dead ends: 82 [2021-11-23 13:05:40,801 INFO L226 Difference]: Without dead ends: 69 [2021-11-23 13:05:40,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2021-11-23 13:05:40,803 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 156 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:05:40,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 77 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:05:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-23 13:05:40,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-11-23 13:05:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2021-11-23 13:05:40,826 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 19 [2021-11-23 13:05:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:05:40,827 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2021-11-23 13:05:40,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2021-11-23 13:05:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 13:05:40,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:05:40,828 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:05:40,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-23 13:05:41,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:05:41,040 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:05:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:05:41,041 INFO L85 PathProgramCache]: Analyzing trace with hash -721629418, now seen corresponding path program 3 times [2021-11-23 13:05:41,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:05:41,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051957872] [2021-11-23 13:05:41,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:05:41,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:05:41,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:05:41,043 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:05:41,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 13:05:41,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 13:05:41,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:05:41,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 13:05:41,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:05:41,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 13:05:41,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:05:41,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2021-11-23 13:05:41,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:05:41,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:05:41,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:05:41,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:05:41,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 60 [2021-11-23 13:05:41,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:05:41,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:05:41,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:05:41,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:05:41,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:05:41,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:05:41,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:05:41,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2021-11-23 13:05:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:05:42,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:05:44,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 71 [2021-11-23 13:05:44,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1146 treesize of output 1142 [2021-11-23 13:05:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:05:47,891 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:05:47,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051957872] [2021-11-23 13:05:47,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051957872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:05:47,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:05:47,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-23 13:05:47,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300643193] [2021-11-23 13:05:47,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:05:47,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 13:05:47,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:05:47,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 13:05:47,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:05:47,894 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:05:55,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:06:04,326 WARN L227 SmtUtils]: Spent 6.64s on a formula simplification. DAG size of input: 85 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:06:20,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:06:30,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:06:40,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:06:40,643 INFO L93 Difference]: Finished difference Result 203 states and 250 transitions. [2021-11-23 13:06:40,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-23 13:06:40,646 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 13:06:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:06:40,648 INFO L225 Difference]: With dead ends: 203 [2021-11-23 13:06:40,648 INFO L226 Difference]: Without dead ends: 201 [2021-11-23 13:06:40,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 39.9s TimeCoverageRelationStatistics Valid=688, Invalid=2174, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 13:06:40,651 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 224 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 173 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:06:40,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 195 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 479 Invalid, 3 Unknown, 0 Unchecked, 16.4s Time] [2021-11-23 13:06:40,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-23 13:06:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 78. [2021-11-23 13:06:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 77 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2021-11-23 13:06:40,683 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 19 [2021-11-23 13:06:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:06:40,684 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2021-11-23 13:06:40,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2021-11-23 13:06:40,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 13:06:40,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:06:40,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:06:40,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:06:40,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:06:40,892 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:06:40,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:06:40,892 INFO L85 PathProgramCache]: Analyzing trace with hash 705157507, now seen corresponding path program 4 times [2021-11-23 13:06:40,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:06:40,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213441278] [2021-11-23 13:06:40,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:06:40,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:06:40,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:06:40,894 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:06:40,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 13:06:40,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:06:40,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:06:40,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 13:06:41,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:06:41,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 13:06:41,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:06:41,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 13:06:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:06:41,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:06:42,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-23 13:06:42,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 101 [2021-11-23 13:06:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:06:44,168 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:06:44,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213441278] [2021-11-23 13:06:44,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213441278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:06:44,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:06:44,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-23 13:06:44,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203687130] [2021-11-23 13:06:44,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:06:44,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 13:06:44,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:06:44,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 13:06:44,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:06:44,171 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:47,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:06:49,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:06:51,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:06:53,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:06:56,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:06:58,955 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:07:00,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:07:12,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:07:12,557 INFO L93 Difference]: Finished difference Result 263 states and 314 transitions. [2021-11-23 13:07:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-23 13:07:12,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 13:07:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:07:12,563 INFO L225 Difference]: With dead ends: 263 [2021-11-23 13:07:12,563 INFO L226 Difference]: Without dead ends: 261 [2021-11-23 13:07:12,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=936, Invalid=3354, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 13:07:12,566 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 155 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 101 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:07:12,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 242 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 547 Invalid, 7 Unknown, 0 Unchecked, 18.0s Time] [2021-11-23 13:07:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-23 13:07:12,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 95. [2021-11-23 13:07:12,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2872340425531914) internal successors, (121), 94 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:07:12,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2021-11-23 13:07:12,605 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 20 [2021-11-23 13:07:12,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:07:12,606 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2021-11-23 13:07:12,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:07:12,606 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2021-11-23 13:07:12,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 13:07:12,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:07:12,608 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:07:12,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-23 13:07:12,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:07:12,821 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:07:12,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:07:12,821 INFO L85 PathProgramCache]: Analyzing trace with hash 177241417, now seen corresponding path program 2 times [2021-11-23 13:07:12,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:07:12,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824327654] [2021-11-23 13:07:12,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:07:12,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:07:12,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:07:12,823 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:07:12,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 13:07:12,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:07:12,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:07:12,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 13:07:12,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:07:13,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 13:07:13,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:07:13,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 13:07:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:07:13,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:07:15,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 13:07:15,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 300 treesize of output 292 [2021-11-23 13:07:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:07:17,143 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:07:17,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824327654] [2021-11-23 13:07:17,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824327654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:07:17,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:07:17,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-23 13:07:17,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408202682] [2021-11-23 13:07:17,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:07:17,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 13:07:17,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:07:17,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 13:07:17,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:07:17,146 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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 13:07:29,721 WARN L227 SmtUtils]: Spent 9.24s on a formula simplification. DAG size of input: 57 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:07:48,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:07:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:07:57,652 INFO L93 Difference]: Finished difference Result 221 states and 269 transitions. [2021-11-23 13:07:57,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 13:07:57,656 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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 21 [2021-11-23 13:07:57,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:07:57,658 INFO L225 Difference]: With dead ends: 221 [2021-11-23 13:07:57,658 INFO L226 Difference]: Without dead ends: 219 [2021-11-23 13:07:57,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=518, Invalid=2032, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 13:07:57,661 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 142 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 96 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:07:57,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 272 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 632 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2021-11-23 13:07:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-23 13:07:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 103. [2021-11-23 13:07:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.2843137254901962) internal successors, (131), 102 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:07:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 131 transitions. [2021-11-23 13:07:57,701 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 131 transitions. Word has length 21 [2021-11-23 13:07:57,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:07:57,701 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 131 transitions. [2021-11-23 13:07:57,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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 13:07:57,702 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 131 transitions. [2021-11-23 13:07:57,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 13:07:57,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:07:57,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:07:57,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-23 13:07:57,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:07:57,908 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:07:57,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:07:57,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1946671471, now seen corresponding path program 1 times [2021-11-23 13:07:57,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:07:57,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246251039] [2021-11-23 13:07:57,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:07:57,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:07:57,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:07:57,909 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:07:57,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 13:07:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:07:58,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 13:07:58,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:07:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:07:58,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:07:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:07:58,668 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:07:58,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246251039] [2021-11-23 13:07:58,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246251039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:07:58,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:07:58,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-23 13:07:58,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211847220] [2021-11-23 13:07:58,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:07:58,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 13:07:58,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:07:58,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 13:07:58,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-23 13:07:58,671 INFO L87 Difference]: Start difference. First operand 103 states and 131 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 13:07:59,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:07:59,067 INFO L93 Difference]: Finished difference Result 178 states and 223 transitions. [2021-11-23 13:07:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:07:59,068 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 22 [2021-11-23 13:07:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:07:59,070 INFO L225 Difference]: With dead ends: 178 [2021-11-23 13:07:59,070 INFO L226 Difference]: Without dead ends: 151 [2021-11-23 13:07:59,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-23 13:07:59,072 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 72 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:07:59,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 98 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:07:59,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-23 13:07:59,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 108. [2021-11-23 13:07:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.2616822429906542) internal successors, (135), 107 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:07:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 135 transitions. [2021-11-23 13:07:59,123 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 135 transitions. Word has length 22 [2021-11-23 13:07:59,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:07:59,123 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 135 transitions. [2021-11-23 13:07:59,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 13:07:59,124 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 135 transitions. [2021-11-23 13:07:59,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 13:07:59,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:07:59,126 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:07:59,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-23 13:07:59,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:07:59,340 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:07:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:07:59,340 INFO L85 PathProgramCache]: Analyzing trace with hash -33011261, now seen corresponding path program 5 times [2021-11-23 13:07:59,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:07:59,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008920430] [2021-11-23 13:07:59,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:07:59,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:07:59,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:07:59,342 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:07:59,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 13:07:59,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-23 13:07:59,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:07:59,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 13:07:59,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:07:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:07:59,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:07:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:07:59,907 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:07:59,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008920430] [2021-11-23 13:07:59,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008920430] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:07:59,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:07:59,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-23 13:07:59,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330607073] [2021-11-23 13:07:59,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:07:59,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 13:07:59,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:07:59,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 13:07:59,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-23 13:07:59,910 INFO L87 Difference]: Start difference. First operand 108 states and 135 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:08:01,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:08:01,977 INFO L93 Difference]: Finished difference Result 287 states and 353 transitions. [2021-11-23 13:08:01,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 13:08:01,978 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 22 [2021-11-23 13:08:01,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:08:01,980 INFO L225 Difference]: With dead ends: 287 [2021-11-23 13:08:01,980 INFO L226 Difference]: Without dead ends: 227 [2021-11-23 13:08:01,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 13:08:01,983 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 296 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:08:01,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 250 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 13:08:01,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-23 13:08:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 133. [2021-11-23 13:08:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.2575757575757576) internal successors, (166), 132 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:08:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 166 transitions. [2021-11-23 13:08:02,056 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 166 transitions. Word has length 22 [2021-11-23 13:08:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:08:02,057 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 166 transitions. [2021-11-23 13:08:02,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:08:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 166 transitions. [2021-11-23 13:08:02,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 13:08:02,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:08:02,059 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:08:02,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 13:08:02,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:08:02,273 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:08:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:08:02,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1380616778, now seen corresponding path program 3 times [2021-11-23 13:08:02,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:08:02,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484381399] [2021-11-23 13:08:02,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:08:02,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:08:02,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:08:02,275 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:08:02,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 13:08:02,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 13:08:02,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:08:02,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 13:08:02,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:08:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:08:02,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:08:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:08:03,134 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:08:03,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484381399] [2021-11-23 13:08:03,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484381399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:08:03,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:08:03,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-11-23 13:08:03,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231926871] [2021-11-23 13:08:03,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:08:03,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 13:08:03,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:08:03,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 13:08:03,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:08:03,137 INFO L87 Difference]: Start difference. First operand 133 states and 166 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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 13:08:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:08:05,029 INFO L93 Difference]: Finished difference Result 238 states and 289 transitions. [2021-11-23 13:08:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 13:08:05,030 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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 23 [2021-11-23 13:08:05,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:08:05,032 INFO L225 Difference]: With dead ends: 238 [2021-11-23 13:08:05,032 INFO L226 Difference]: Without dead ends: 182 [2021-11-23 13:08:05,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 13:08:05,034 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 306 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:08:05,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 213 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 13:08:05,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-23 13:08:05,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 146. [2021-11-23 13:08:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.2413793103448276) internal successors, (180), 145 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:08:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 180 transitions. [2021-11-23 13:08:05,112 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 180 transitions. Word has length 23 [2021-11-23 13:08:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:08:05,113 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 180 transitions. [2021-11-23 13:08:05,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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 13:08:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 180 transitions. [2021-11-23 13:08:05,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 13:08:05,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:08:05,117 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:08:05,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 13:08:05,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:08:05,332 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:08:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:08:05,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1231153911, now seen corresponding path program 4 times [2021-11-23 13:08:05,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:08:05,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800026657] [2021-11-23 13:08:05,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:08:05,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:08:05,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:08:05,334 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:08:05,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f2a169-7e0b-4aa0-9a71-48648b086ffe/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 13:08:05,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:08:05,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:08:05,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 13:08:05,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:08:05,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:08:05,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:08:05,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2021-11-23 13:08:05,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:08:05,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:08:05,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:08:05,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:08:05,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 58 [2021-11-23 13:08:06,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:08:06,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:08:06,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:08:06,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:08:06,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:08:06,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:08:06,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:08:06,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 54 [2021-11-23 13:08:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:08:07,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:08:11,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 75 [2021-11-23 13:08:11,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21822 treesize of output 21694