./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array3_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array3_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF --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 8c9f77a5f5cfb41429e6b2e557580f5f8a855ca718c241fb5a07541ef3b21ab2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:00:03,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:00:03,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:00:03,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:00:03,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:00:03,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:00:03,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:00:03,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:00:03,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:00:03,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:00:03,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:00:03,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:00:03,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:00:03,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:00:03,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:00:03,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:00:03,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:00:03,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:00:03,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:00:03,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:00:03,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:00:03,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:00:03,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:00:03,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:00:03,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:00:03,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:00:03,455 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:00:03,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:00:03,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:00:03,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:00:03,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:00:03,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:00:03,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:00:03,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:00:03,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:00:03,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:00:03,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:00:03,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:00:03,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:00:03,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:00:03,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:00:03,477 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:00:03,520 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:00:03,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:00:03,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:00:03,527 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:00:03,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:00:03,529 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:00:03,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:00:03,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:00:03,530 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:00:03,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:00:03,531 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:00:03,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:00:03,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:00:03,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:00:03,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:00:03,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:00:03,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:00:03,533 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:00:03,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:00:03,533 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:00:03,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:00:03,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:00:03,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:00:03,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:00:03,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:00:03,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:00:03,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:00:03,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:00:03,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:00:03,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:00:03,537 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:00:03,537 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:00:03,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:00:03,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:00:03,538 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_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c9f77a5f5cfb41429e6b2e557580f5f8a855ca718c241fb5a07541ef3b21ab2 [2021-11-20 07:00:03,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:00:03,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:00:03,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:00:03,838 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:00:03,839 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:00:03,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array3_pattern.c [2021-11-20 07:00:03,895 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/data/769714144/82efbb532cd74a1bb29ed5fd37449ea5/FLAG9ddd226cd [2021-11-20 07:00:04,329 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:00:04,330 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/sv-benchmarks/c/array-patterns/array3_pattern.c [2021-11-20 07:00:04,342 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/data/769714144/82efbb532cd74a1bb29ed5fd37449ea5/FLAG9ddd226cd [2021-11-20 07:00:04,700 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/data/769714144/82efbb532cd74a1bb29ed5fd37449ea5 [2021-11-20 07:00:04,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:00:04,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:00:04,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:00:04,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:00:04,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:00:04,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:00:04" (1/1) ... [2021-11-20 07:00:04,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@714a0e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:04, skipping insertion in model container [2021-11-20 07:00:04,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:00:04" (1/1) ... [2021-11-20 07:00:04,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:00:04,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:00:04,927 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_31abab77-de01-4997-a75a-5bcb4b02ef33/sv-benchmarks/c/array-patterns/array3_pattern.c[1393,1406] [2021-11-20 07:00:04,946 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:00:04,952 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:00:04,962 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_31abab77-de01-4997-a75a-5bcb4b02ef33/sv-benchmarks/c/array-patterns/array3_pattern.c[1393,1406] [2021-11-20 07:00:04,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:00:04,985 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:00:04,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:04 WrapperNode [2021-11-20 07:00:04,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:00:04,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:00:04,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:00:04,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:00:05,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:04" (1/1) ... [2021-11-20 07:00:05,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:04" (1/1) ... [2021-11-20 07:00:05,032 INFO L137 Inliner]: procedures = 17, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2021-11-20 07:00:05,034 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:00:05,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:00:05,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:00:05,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:00:05,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:04" (1/1) ... [2021-11-20 07:00:05,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:04" (1/1) ... [2021-11-20 07:00:05,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:04" (1/1) ... [2021-11-20 07:00:05,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:04" (1/1) ... [2021-11-20 07:00:05,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:04" (1/1) ... [2021-11-20 07:00:05,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:04" (1/1) ... [2021-11-20 07:00:05,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:04" (1/1) ... [2021-11-20 07:00:05,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:00:05,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:00:05,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:00:05,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:00:05,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:04" (1/1) ... [2021-11-20 07:00:05,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:00:05,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:00:05,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:00:05,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:00:05,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:00:05,148 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 07:00:05,148 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 07:00:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:00:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:00:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:00:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure square [2021-11-20 07:00:05,149 INFO L138 BoogieDeclarations]: Found implementation of procedure square [2021-11-20 07:00:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:00:05,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:00:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:00:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:00:05,210 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:00:05,211 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:00:05,404 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:00:05,410 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:00:05,410 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 07:00:05,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:00:05 BoogieIcfgContainer [2021-11-20 07:00:05,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:00:05,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:00:05,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:00:05,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:00:05,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:00:04" (1/3) ... [2021-11-20 07:00:05,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d918f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:00:05, skipping insertion in model container [2021-11-20 07:00:05,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:04" (2/3) ... [2021-11-20 07:00:05,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d918f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:00:05, skipping insertion in model container [2021-11-20 07:00:05,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:00:05" (3/3) ... [2021-11-20 07:00:05,420 INFO L111 eAbstractionObserver]: Analyzing ICFG array3_pattern.c [2021-11-20 07:00:05,424 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:00:05,425 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:00:05,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:00:05,508 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 [2021-11-20 07:00:05,508 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:00:05,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:00:05,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 07:00:05,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:00:05,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:00:05,531 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:00:05,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:00:05,536 INFO L85 PathProgramCache]: Analyzing trace with hash -87958078, now seen corresponding path program 1 times [2021-11-20 07:00:05,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:00:05,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577247680] [2021-11-20 07:00:05,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:05,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:00:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:00:05,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:00:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:00:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:00:05,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:00:05,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577247680] [2021-11-20 07:00:05,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577247680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:00:05,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:00:05,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:00:05,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737666555] [2021-11-20 07:00:05,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:00:05,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:00:05,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:00:05,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:00:05,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:00:05,757 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:00:05,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:00:05,777 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2021-11-20 07:00:05,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:00:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 07:00:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:00:05,786 INFO L225 Difference]: With dead ends: 61 [2021-11-20 07:00:05,787 INFO L226 Difference]: Without dead ends: 28 [2021-11-20 07:00:05,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:00:05,794 INFO L933 BasicCegarLoop]: 36 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, 36 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 [2021-11-20 07:00:05,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:00:05,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-20 07:00:05,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-20 07:00:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:00:05,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-20 07:00:05,831 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2021-11-20 07:00:05,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:00:05,831 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-20 07:00:05,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:00:05,832 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-20 07:00:05,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 07:00:05,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:00:05,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:00:05,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:00:05,834 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:00:05,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:00:05,836 INFO L85 PathProgramCache]: Analyzing trace with hash 100431803, now seen corresponding path program 1 times [2021-11-20 07:00:05,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:00:05,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701398124] [2021-11-20 07:00:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:05,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:00:05,867 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:00:05,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573025914] [2021-11-20 07:00:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:05,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:05,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:00:05,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:00:05,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:00:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:00:05,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:00:05,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:00:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:00:06,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:00:06,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:00:06,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701398124] [2021-11-20 07:00:06,260 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:00:06,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573025914] [2021-11-20 07:00:06,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573025914] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:00:06,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:00:06,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:00:06,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81308221] [2021-11-20 07:00:06,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:00:06,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:00:06,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:00:06,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:00:06,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:00:06,265 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:00:06,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:00:06,294 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-11-20 07:00:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:00:06,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-11-20 07:00:06,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:00:06,297 INFO L225 Difference]: With dead ends: 35 [2021-11-20 07:00:06,297 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 07:00:06,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:00:06,299 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:00:06,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 79 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:00:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 07:00:06,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-20 07:00:06,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:00:06,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-20 07:00:06,309 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2021-11-20 07:00:06,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:00:06,310 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-20 07:00:06,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:00:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-20 07:00:06,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 07:00:06,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:00:06,313 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:00:06,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:00:06,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:06,531 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:00:06,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:00:06,532 INFO L85 PathProgramCache]: Analyzing trace with hash -562345857, now seen corresponding path program 1 times [2021-11-20 07:00:06,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:00:06,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287477387] [2021-11-20 07:00:06,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:06,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:00:06,573 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:00:06,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900923304] [2021-11-20 07:00:06,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:06,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:06,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:00:06,583 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:00:06,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:00:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:00:06,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:00:06,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:00:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:00:06,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:00:06,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:00:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287477387] [2021-11-20 07:00:06,832 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:00:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900923304] [2021-11-20 07:00:06,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900923304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:00:06,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:00:06,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:00:06,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572456760] [2021-11-20 07:00:06,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:00:06,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:00:06,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:00:06,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:00:06,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:00:06,837 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:00:06,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:00:06,922 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-11-20 07:00:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:00:06,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-11-20 07:00:06,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:00:06,926 INFO L225 Difference]: With dead ends: 59 [2021-11-20 07:00:06,926 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 07:00:06,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:00:06,929 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:00:06,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 84 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:00:06,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 07:00:06,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-11-20 07:00:06,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:00:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-20 07:00:06,942 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 34 [2021-11-20 07:00:06,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:00:06,943 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-20 07:00:06,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:00:06,945 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-20 07:00:06,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 07:00:06,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:00:06,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:00:06,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:00:07,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:07,165 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:00:07,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:00:07,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1168592577, now seen corresponding path program 1 times [2021-11-20 07:00:07,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:00:07,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025609608] [2021-11-20 07:00:07,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:07,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:00:07,187 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:00:07,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800585137] [2021-11-20 07:00:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:07,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:07,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:00:07,189 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:00:07,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:00:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:00:07,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-20 07:00:07,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:00:07,320 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 10 treesize of output 8 [2021-11-20 07:00:07,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:00:08,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:08,267 INFO L354 Elim1Store]: treesize reduction 393, result has 10.9 percent of original size [2021-11-20 07:00:08,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 219 treesize of output 163 [2021-11-20 07:00:08,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:00:08,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:08,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:08,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:00:08,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 67 [2021-11-20 07:00:09,592 INFO L354 Elim1Store]: treesize reduction 87, result has 7.4 percent of original size [2021-11-20 07:00:09,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 36 [2021-11-20 07:00:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:00:09,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:00:14,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:00:14,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025609608] [2021-11-20 07:00:14,853 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:00:14,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800585137] [2021-11-20 07:00:14,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800585137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:00:14,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:00:14,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-20 07:00:14,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080297607] [2021-11-20 07:00:14,854 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:00:14,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 07:00:14,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:00:14,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 07:00:14,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=748, Unknown=1, NotChecked=0, Total=870 [2021-11-20 07:00:14,856 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 16 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:00:15,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:00:15,150 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2021-11-20 07:00:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:00:15,151 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 16 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-11-20 07:00:15,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:00:15,153 INFO L225 Difference]: With dead ends: 57 [2021-11-20 07:00:15,154 INFO L226 Difference]: Without dead ends: 53 [2021-11-20 07:00:15,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=129, Invalid=800, Unknown=1, NotChecked=0, Total=930 [2021-11-20 07:00:15,157 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:00:15,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 226 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 95 Unchecked, 0.1s Time] [2021-11-20 07:00:15,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-20 07:00:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-11-20 07:00:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:00:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-11-20 07:00:15,169 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 36 [2021-11-20 07:00:15,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:00:15,169 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-11-20 07:00:15,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 16 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:00:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-11-20 07:00:15,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 07:00:15,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:00:15,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:00:15,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:00:15,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:15,389 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:00:15,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:00:15,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1846883197, now seen corresponding path program 2 times [2021-11-20 07:00:15,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:00:15,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061906232] [2021-11-20 07:00:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:15,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:00:15,414 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:00:15,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945922849] [2021-11-20 07:00:15,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:00:15,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:15,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:00:15,418 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:00:15,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:00:15,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:00:15,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:00:15,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:00:15,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:00:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:00:15,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:00:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:00:15,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:00:15,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061906232] [2021-11-20 07:00:15,760 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:00:15,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945922849] [2021-11-20 07:00:15,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945922849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:00:15,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:00:15,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 07:00:15,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200916927] [2021-11-20 07:00:15,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:00:15,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:00:15,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:00:15,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:00:15,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:00:15,764 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:00:16,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:00:16,041 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2021-11-20 07:00:16,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:00:16,045 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2021-11-20 07:00:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:00:16,046 INFO L225 Difference]: With dead ends: 89 [2021-11-20 07:00:16,046 INFO L226 Difference]: Without dead ends: 85 [2021-11-20 07:00:16,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:00:16,048 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 58 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:00:16,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 112 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:00:16,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-20 07:00:16,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2021-11-20 07:00:16,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 53 states have internal predecessors, (57), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 07:00:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2021-11-20 07:00:16,070 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 38 [2021-11-20 07:00:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:00:16,072 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2021-11-20 07:00:16,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:00:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2021-11-20 07:00:16,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 07:00:16,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:00:16,081 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:00:16,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:00:16,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:16,295 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:00:16,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:00:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash 383375294, now seen corresponding path program 1 times [2021-11-20 07:00:16,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:00:16,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249242108] [2021-11-20 07:00:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:16,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:00:16,309 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:00:16,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993594815] [2021-11-20 07:00:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:16,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:16,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:00:16,319 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:00:16,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:00:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:00:16,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-20 07:00:16,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:00:16,524 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 10 treesize of output 8 [2021-11-20 07:00:16,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:00:17,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,238 INFO L354 Elim1Store]: treesize reduction 416, result has 7.3 percent of original size [2021-11-20 07:00:17,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 232 treesize of output 153 [2021-11-20 07:00:17,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 69 [2021-11-20 07:00:18,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:18,268 INFO L354 Elim1Store]: treesize reduction 397, result has 10.0 percent of original size [2021-11-20 07:00:18,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 219 treesize of output 159 [2021-11-20 07:00:18,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:18,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 47 [2021-11-20 07:00:19,466 INFO L354 Elim1Store]: treesize reduction 87, result has 7.4 percent of original size [2021-11-20 07:00:19,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 36 [2021-11-20 07:00:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:00:19,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:23,748 WARN L227 SmtUtils]: Spent 49.62s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 07:04:20,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:04:20,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249242108] [2021-11-20 07:04:20,485 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:04:20,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993594815] [2021-11-20 07:04:20,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993594815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:04:20,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:04:20,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-20 07:04:20,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868948992] [2021-11-20 07:04:20,485 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:04:20,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 07:04:20,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:04:20,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 07:04:20,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1421, Unknown=11, NotChecked=0, Total=1640 [2021-11-20 07:04:20,487 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 27 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 21 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:04:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:04:21,751 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2021-11-20 07:04:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 07:04:21,752 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 21 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-11-20 07:04:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:04:21,754 INFO L225 Difference]: With dead ends: 87 [2021-11-20 07:04:21,754 INFO L226 Difference]: Without dead ends: 83 [2021-11-20 07:04:21,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 53.9s TimeCoverageRelationStatistics Valid=257, Invalid=1712, Unknown=11, NotChecked=0, Total=1980 [2021-11-20 07:04:21,756 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 29 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:04:21,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 327 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 120 Unchecked, 0.1s Time] [2021-11-20 07:04:21,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-20 07:04:21,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2021-11-20 07:04:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 46 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 07:04:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-11-20 07:04:21,784 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 44 [2021-11-20 07:04:21,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:04:21,784 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-11-20 07:04:21,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 21 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:04:21,785 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-11-20 07:04:21,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:04:21,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:04:21,786 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:04:21,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:04:22,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:04:22,007 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:04:22,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:04:22,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1867659643, now seen corresponding path program 3 times [2021-11-20 07:04:22,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:04:22,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925924023] [2021-11-20 07:04:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:04:22,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:04:22,023 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:04:22,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875973149] [2021-11-20 07:04:22,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:04:22,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:04:22,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:04:22,025 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:04:22,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:04:22,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:04:22,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:04:22,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:04:22,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:04:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:04:22,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:04:22,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:04:22,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925924023] [2021-11-20 07:04:22,417 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:04:22,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875973149] [2021-11-20 07:04:22,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875973149] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:04:22,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:04:22,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 07:04:22,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090850036] [2021-11-20 07:04:22,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:04:22,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:04:22,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:04:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:04:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:04:22,419 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 07:04:22,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:04:22,587 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2021-11-20 07:04:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:04:22,588 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 48 [2021-11-20 07:04:22,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:04:22,589 INFO L225 Difference]: With dead ends: 83 [2021-11-20 07:04:22,589 INFO L226 Difference]: Without dead ends: 48 [2021-11-20 07:04:22,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:04:22,591 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 45 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:04:22,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 135 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:04:22,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-20 07:04:22,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-11-20 07:04:22,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:04:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-20 07:04:22,600 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 48 [2021-11-20 07:04:22,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:04:22,600 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-20 07:04:22,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 07:04:22,614 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-20 07:04:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 07:04:22,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:04:22,615 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:04:22,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:04:22,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:04:22,843 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:04:22,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:04:22,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1239986503, now seen corresponding path program 4 times [2021-11-20 07:04:22,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:04:22,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234313507] [2021-11-20 07:04:22,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:04:22,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:04:22,854 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:04:22,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080312020] [2021-11-20 07:04:22,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:04:22,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:04:22,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:04:22,859 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:04:22,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:04:23,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:04:23,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:04:23,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-20 07:04:23,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:04:23,110 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 10 treesize of output 8 [2021-11-20 07:04:23,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:04:23,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:23,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:23,281 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 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-20 07:04:24,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,312 INFO L354 Elim1Store]: treesize reduction 581, result has 16.5 percent of original size [2021-11-20 07:04:24,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 240 treesize of output 239 [2021-11-20 07:04:25,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:25,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:25,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:25,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:25,580 INFO L354 Elim1Store]: treesize reduction 38, result has 24.0 percent of original size [2021-11-20 07:04:25,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 335 treesize of output 241 [2021-11-20 07:04:31,936 WARN L322 ript$VariableManager]: TermVariabe aux_mod_aux_mod_~ARR_SIZE~0_91_39 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:04:42,515 WARN L322 ript$VariableManager]: TermVariabe aux_mod_aux_mod_~ARR_SIZE~0_91_39 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:04:51,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:04:51,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 108 [2021-11-20 07:04:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:04:52,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:05:10,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:05:10,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234313507] [2021-11-20 07:05:10,452 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:05:10,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080312020] [2021-11-20 07:05:10,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080312020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:05:10,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:05:10,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-20 07:05:10,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714998247] [2021-11-20 07:05:10,453 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:05:10,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 07:05:10,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:05:10,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 07:05:10,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1780, Unknown=1, NotChecked=0, Total=1980 [2021-11-20 07:05:10,456 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 30 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:05:11,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:05:11,600 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-11-20 07:05:11,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 07:05:11,600 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-11-20 07:05:11,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:05:11,602 INFO L225 Difference]: With dead ends: 82 [2021-11-20 07:05:11,602 INFO L226 Difference]: Without dead ends: 78 [2021-11-20 07:05:11,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=224, Invalid=2031, Unknown=1, NotChecked=0, Total=2256 [2021-11-20 07:05:11,604 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:05:11,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 330 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 137 Invalid, 0 Unknown, 229 Unchecked, 0.2s Time] [2021-11-20 07:05:11,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-20 07:05:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2021-11-20 07:05:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 49 states have internal predecessors, (53), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 07:05:11,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2021-11-20 07:05:11,625 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 50 [2021-11-20 07:05:11,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:05:11,625 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2021-11-20 07:05:11,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:05:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2021-11-20 07:05:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 07:05:11,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:05:11,627 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:05:11,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:05:11,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 07:05:11,835 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:05:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:05:11,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1609305207, now seen corresponding path program 5 times [2021-11-20 07:05:11,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:05:11,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335517281] [2021-11-20 07:05:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:05:11,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:05:11,847 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:05:11,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82351430] [2021-11-20 07:05:11,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:05:11,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:05:11,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:05:11,857 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:05:11,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:05:11,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-20 07:05:11,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:05:11,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:05:11,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:05:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:05:12,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:05:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:05:12,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:05:12,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335517281] [2021-11-20 07:05:12,337 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:05:12,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82351430] [2021-11-20 07:05:12,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82351430] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:05:12,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:05:12,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 07:05:12,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753054929] [2021-11-20 07:05:12,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:05:12,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:05:12,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:05:12,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:05:12,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:05:12,339 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 07:05:12,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:05:12,738 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2021-11-20 07:05:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:05:12,739 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 52 [2021-11-20 07:05:12,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:05:12,741 INFO L225 Difference]: With dead ends: 113 [2021-11-20 07:05:12,741 INFO L226 Difference]: Without dead ends: 109 [2021-11-20 07:05:12,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:05:12,742 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 56 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:05:12,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 187 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:05:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-20 07:05:12,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 94. [2021-11-20 07:05:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 68 states have (on average 1.088235294117647) internal successors, (74), 70 states have internal predecessors, (74), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-20 07:05:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2021-11-20 07:05:12,763 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 52 [2021-11-20 07:05:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:05:12,763 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2021-11-20 07:05:12,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 07:05:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2021-11-20 07:05:12,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:05:12,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:05:12,765 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:05:12,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:05:12,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:05:12,985 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:05:12,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:05:12,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1113507012, now seen corresponding path program 2 times [2021-11-20 07:05:12,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:05:12,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635367437] [2021-11-20 07:05:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:05:12,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:05:13,000 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:05:13,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325007746] [2021-11-20 07:05:13,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:05:13,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:05:13,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:05:13,002 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:05:13,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:05:13,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:05:13,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:05:13,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-20 07:05:13,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:05:13,530 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 10 treesize of output 8 [2021-11-20 07:05:13,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:05:13,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:13,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:13,698 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 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 07:05:14,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:14,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:14,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:14,691 INFO L354 Elim1Store]: treesize reduction 582, result has 18.3 percent of original size [2021-11-20 07:05:14,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 250 treesize of output 256 [2021-11-20 07:05:14,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:05:14,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:05:14,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:05:15,052 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:05:15,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:15,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:15,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:15,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:15,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:15,635 INFO L354 Elim1Store]: treesize reduction 60, result has 10.4 percent of original size [2021-11-20 07:05:15,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 333 treesize of output 217 [2021-11-20 07:05:20,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:20,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:20,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:21,167 INFO L354 Elim1Store]: treesize reduction 940, result has 16.4 percent of original size [2021-11-20 07:05:21,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 323 treesize of output 346 [2021-11-20 07:05:31,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:31,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:31,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:31,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:31,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:31,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:31,108 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-20 07:05:31,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 99 [2021-11-20 07:05:34,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:34,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:34,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:34,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:34,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:34,243 INFO L354 Elim1Store]: treesize reduction 36, result has 32.1 percent of original size [2021-11-20 07:05:34,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 171 treesize of output 110 [2021-11-20 07:05:36,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:36,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:36,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:36,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:36,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:36,264 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:05:36,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 91 [2021-11-20 07:05:39,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:39,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:39,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:39,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:39,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:05:39,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 218 treesize of output 196 [2021-11-20 07:05:39,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:39,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:39,727 INFO L354 Elim1Store]: treesize reduction 122, result has 2.4 percent of original size [2021-11-20 07:05:39,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 209 treesize of output 154 [2021-11-20 07:05:39,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:39,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:39,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:39,999 INFO L354 Elim1Store]: treesize reduction 108, result has 2.7 percent of original size [2021-11-20 07:05:40,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 147 [2021-11-20 07:05:40,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:40,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:40,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:40,258 INFO L354 Elim1Store]: treesize reduction 108, result has 2.7 percent of original size [2021-11-20 07:05:40,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 198 treesize of output 137 [2021-11-20 07:05:40,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:40,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:40,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:40,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:40,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:40,560 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:05:40,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 69 [2021-11-20 07:05:40,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:40,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:40,824 INFO L354 Elim1Store]: treesize reduction 122, result has 2.4 percent of original size [2021-11-20 07:05:40,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 219 treesize of output 164 [2021-11-20 07:05:56,407 INFO L354 Elim1Store]: treesize reduction 49, result has 14.0 percent of original size [2021-11-20 07:05:56,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 151 treesize of output 81 [2021-11-20 07:05:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:05:58,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:16,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:16,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635367437] [2021-11-20 07:06:16,391 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:06:16,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325007746] [2021-11-20 07:06:16,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325007746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:16,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:06:16,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-11-20 07:06:16,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270309717] [2021-11-20 07:06:16,392 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:16,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 07:06:16,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:16,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 07:06:16,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2287, Unknown=3, NotChecked=0, Total=2550 [2021-11-20 07:06:16,394 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand has 36 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 27 states have internal predecessors, (40), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:06:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:18,203 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2021-11-20 07:06:18,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 07:06:18,204 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 27 states have internal predecessors, (40), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2021-11-20 07:06:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:18,206 INFO L225 Difference]: With dead ends: 128 [2021-11-20 07:06:18,206 INFO L226 Difference]: Without dead ends: 124 [2021-11-20 07:06:18,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=345, Invalid=2844, Unknown=3, NotChecked=0, Total=3192 [2021-11-20 07:06:18,208 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:18,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 229 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 107 Unchecked, 0.2s Time] [2021-11-20 07:06:18,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-20 07:06:18,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2021-11-20 07:06:18,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 76 states have internal predecessors, (81), 19 states have call successors, (19), 8 states have call predecessors, (19), 8 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-20 07:06:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2021-11-20 07:06:18,232 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 58 [2021-11-20 07:06:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:18,232 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2021-11-20 07:06:18,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 27 states have internal predecessors, (40), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:06:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2021-11-20 07:06:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 07:06:18,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:18,235 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:18,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:18,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:06:18,451 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:18,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1015123979, now seen corresponding path program 6 times [2021-11-20 07:06:18,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:18,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082514097] [2021-11-20 07:06:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:18,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:18,466 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:06:18,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078321055] [2021-11-20 07:06:18,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:06:18,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:18,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:18,468 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:18,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:06:18,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-20 07:06:18,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:06:18,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:06:18,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 49 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 07:06:18,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 07:06:19,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:19,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082514097] [2021-11-20 07:06:19,009 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:06:19,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078321055] [2021-11-20 07:06:19,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078321055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:06:19,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:06:19,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 07:06:19,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602293854] [2021-11-20 07:06:19,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:19,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:06:19,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:19,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:06:19,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:06:19,012 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-20 07:06:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:19,454 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2021-11-20 07:06:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:06:19,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 62 [2021-11-20 07:06:19,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:19,457 INFO L225 Difference]: With dead ends: 131 [2021-11-20 07:06:19,457 INFO L226 Difference]: Without dead ends: 101 [2021-11-20 07:06:19,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:06:19,458 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 79 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:19,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 159 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:06:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-20 07:06:19,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2021-11-20 07:06:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 07:06:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2021-11-20 07:06:19,482 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 62 [2021-11-20 07:06:19,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:19,482 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2021-11-20 07:06:19,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-20 07:06:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2021-11-20 07:06:19,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:06:19,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:19,485 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:19,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:19,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 07:06:19,703 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:19,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:19,703 INFO L85 PathProgramCache]: Analyzing trace with hash -274628787, now seen corresponding path program 7 times [2021-11-20 07:06:19,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:19,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438540097] [2021-11-20 07:06:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:19,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:19,713 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:06:19,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445528624] [2021-11-20 07:06:19,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:06:19,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:19,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:19,729 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:19,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:06:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-20 07:06:20,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:20,269 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 10 treesize of output 8 [2021-11-20 07:06:20,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:06:20,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:20,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:20,461 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 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-20 07:06:20,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:20,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:20,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:20,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:20,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:20,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:20,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 73 [2021-11-20 07:06:21,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:21,818 INFO L354 Elim1Store]: treesize reduction 760, result has 20.1 percent of original size [2021-11-20 07:06:21,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 258 treesize of output 321 [2021-11-20 07:06:24,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:24,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:24,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:24,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:24,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:24,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:24,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:24,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:24,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:24,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:24,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:24,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:24,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:24,660 INFO L354 Elim1Store]: treesize reduction 122, result has 42.2 percent of original size [2021-11-20 07:06:24,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 14 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 14 case distinctions, treesize of input 636 treesize of output 493 [2021-11-20 07:11:48,225 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-20 07:11:48,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 596 treesize of output 348 [2021-11-20 07:11:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 07:11:53,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:41,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:41,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438540097] [2021-11-20 07:12:41,381 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:12:41,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445528624] [2021-11-20 07:12:41,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445528624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:41,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:12:41,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-11-20 07:12:41,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309958870] [2021-11-20 07:12:41,382 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:41,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 07:12:41,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:41,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 07:12:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=3159, Unknown=4, NotChecked=0, Total=3422 [2021-11-20 07:12:41,385 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 38 states, 32 states have (on average 1.25) internal successors, (40), 29 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:12:43,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:43,372 INFO L93 Difference]: Finished difference Result 139 states and 160 transitions. [2021-11-20 07:12:43,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 07:12:43,373 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 1.25) internal successors, (40), 29 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 64 [2021-11-20 07:12:43,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:43,374 INFO L225 Difference]: With dead ends: 139 [2021-11-20 07:12:43,374 INFO L226 Difference]: Without dead ends: 135 [2021-11-20 07:12:43,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 66.3s TimeCoverageRelationStatistics Valid=299, Invalid=3603, Unknown=4, NotChecked=0, Total=3906 [2021-11-20 07:12:43,377 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 31 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:43,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 387 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 165 Invalid, 0 Unknown, 206 Unchecked, 0.4s Time] [2021-11-20 07:12:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-20 07:12:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 119. [2021-11-20 07:12:43,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 88 states have (on average 1.0795454545454546) internal successors, (95), 89 states have internal predecessors, (95), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-20 07:12:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2021-11-20 07:12:43,398 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 64 [2021-11-20 07:12:43,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:43,399 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2021-11-20 07:12:43,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 1.25) internal successors, (40), 29 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:12:43,399 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2021-11-20 07:12:43,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 07:12:43,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:43,401 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:43,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:43,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:43,615 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:12:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:43,615 INFO L85 PathProgramCache]: Analyzing trace with hash -562295999, now seen corresponding path program 3 times [2021-11-20 07:12:43,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:43,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523113459] [2021-11-20 07:12:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:43,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:43,626 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:12:43,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178594159] [2021-11-20 07:12:43,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:12:43,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:43,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:43,630 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:43,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31abab77-de01-4997-a75a-5bcb4b02ef33/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:12:44,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 07:12:44,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:12:44,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-20 07:12:44,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:44,177 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 10 treesize of output 8 [2021-11-20 07:12:44,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:12:44,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:44,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:44,352 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 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-20 07:12:45,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,325 INFO L354 Elim1Store]: treesize reduction 597, result has 16.2 percent of original size [2021-11-20 07:12:45,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 250 treesize of output 241 [2021-11-20 07:12:45,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,435 INFO L354 Elim1Store]: treesize reduction 21, result has 22.2 percent of original size [2021-11-20 07:12:45,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 70 [2021-11-20 07:12:45,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 61 [2021-11-20 07:12:45,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:12:45,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:45,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 71 [2021-11-20 07:12:45,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:12:53,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:53,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:53,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:53,872 INFO L354 Elim1Store]: treesize reduction 982, result has 14.5 percent of original size [2021-11-20 07:12:53,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 379 treesize of output 340 [2021-11-20 07:12:53,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:12:54,179 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:12:54,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:12:54,666 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:12:55,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:55,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:55,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:55,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:55,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:12:55,321 INFO L354 Elim1Store]: treesize reduction 43, result has 35.8 percent of original size [2021-11-20 07:12:55,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 398 treesize of output 251 [2021-11-20 07:13:03,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:13:03,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:13:03,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:13:04,918 INFO L354 Elim1Store]: treesize reduction 934, result has 17.0 percent of original size [2021-11-20 07:13:04,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 372 treesize of output 358 [2021-11-20 07:13:05,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:13:05,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:13:07,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:13:07,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:13:07,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:13:07,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:13:07,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:13:07,243 INFO L354 Elim1Store]: treesize reduction 39, result has 41.8 percent of original size [2021-11-20 07:13:07,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 433 treesize of output 320