./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/indp3.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_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/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_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/indp3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/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_8a3571a2-7d68-47d0-81fa-42ee3786586a/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 e95db6aea8df845f112e7d303c04ce64867bd2e800c9279283322a7440e1498c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:25:04,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:25:04,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:25:04,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:25:04,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:25:04,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:25:04,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:25:04,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:25:04,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:25:04,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:25:04,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:25:04,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:25:04,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:25:04,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:25:04,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:25:04,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:25:04,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:25:04,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:25:04,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:25:04,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:25:04,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:25:04,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:25:04,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:25:04,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:25:04,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:25:04,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:25:04,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:25:04,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:25:04,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:25:04,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:25:04,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:25:04,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:25:04,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:25:04,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:25:04,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:25:04,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:25:04,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:25:04,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:25:04,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:25:04,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:25:04,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:25:04,383 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:25:04,434 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:25:04,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:25:04,435 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:25:04,435 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:25:04,439 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:25:04,439 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:25:04,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:25:04,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:25:04,440 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:25:04,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:25:04,441 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:25:04,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:25:04,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:25:04,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:25:04,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:25:04,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:25:04,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:25:04,442 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:25:04,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:25:04,443 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:25:04,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:25:04,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:25:04,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:25:04,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:25:04,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:25:04,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:25:04,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:25:04,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:25:04,445 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:25:04,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:25:04,445 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:25:04,445 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:25:04,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:25:04,445 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:25:04,446 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_8a3571a2-7d68-47d0-81fa-42ee3786586a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e95db6aea8df845f112e7d303c04ce64867bd2e800c9279283322a7440e1498c [2021-11-20 07:25:04,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:25:04,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:25:04,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:25:04,762 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:25:04,763 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:25:04,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-fpi/indp3.c [2021-11-20 07:25:04,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/data/68b6aee2a/07dc6f4d707f4b84959ce2090d111899/FLAG48d2153f8 [2021-11-20 07:25:05,290 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:25:05,293 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/sv-benchmarks/c/array-fpi/indp3.c [2021-11-20 07:25:05,298 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/data/68b6aee2a/07dc6f4d707f4b84959ce2090d111899/FLAG48d2153f8 [2021-11-20 07:25:05,661 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/data/68b6aee2a/07dc6f4d707f4b84959ce2090d111899 [2021-11-20 07:25:05,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:25:05,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:25:05,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:25:05,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:25:05,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:25:05,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:25:05" (1/1) ... [2021-11-20 07:25:05,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f554432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:05, skipping insertion in model container [2021-11-20 07:25:05,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:25:05" (1/1) ... [2021-11-20 07:25:05,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:25:05,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:25:05,897 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_8a3571a2-7d68-47d0-81fa-42ee3786586a/sv-benchmarks/c/array-fpi/indp3.c[588,601] [2021-11-20 07:25:05,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:25:05,947 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:25:05,967 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_8a3571a2-7d68-47d0-81fa-42ee3786586a/sv-benchmarks/c/array-fpi/indp3.c[588,601] [2021-11-20 07:25:05,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:25:06,015 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:25:06,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:06 WrapperNode [2021-11-20 07:25:06,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:25:06,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:25:06,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:25:06,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:25:06,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:06" (1/1) ... [2021-11-20 07:25:06,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:06" (1/1) ... [2021-11-20 07:25:06,085 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 85 [2021-11-20 07:25:06,088 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:25:06,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:25:06,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:25:06,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:25:06,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:06" (1/1) ... [2021-11-20 07:25:06,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:06" (1/1) ... [2021-11-20 07:25:06,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:06" (1/1) ... [2021-11-20 07:25:06,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:06" (1/1) ... [2021-11-20 07:25:06,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:06" (1/1) ... [2021-11-20 07:25:06,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:06" (1/1) ... [2021-11-20 07:25:06,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:06" (1/1) ... [2021-11-20 07:25:06,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:25:06,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:25:06,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:25:06,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:25:06,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:06" (1/1) ... [2021-11-20 07:25:06,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:25:06,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:25:06,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:25:06,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:25:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:25:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:25:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:25:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:25:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:25:06,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:25:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:25:06,313 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:25:06,314 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:25:06,508 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:25:06,515 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:25:06,516 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 07:25:06,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:25:06 BoogieIcfgContainer [2021-11-20 07:25:06,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:25:06,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:25:06,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:25:06,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:25:06,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:25:05" (1/3) ... [2021-11-20 07:25:06,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a96891b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:25:06, skipping insertion in model container [2021-11-20 07:25:06,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:06" (2/3) ... [2021-11-20 07:25:06,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a96891b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:25:06, skipping insertion in model container [2021-11-20 07:25:06,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:25:06" (3/3) ... [2021-11-20 07:25:06,543 INFO L111 eAbstractionObserver]: Analyzing ICFG indp3.c [2021-11-20 07:25:06,549 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:25:06,549 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:25:06,628 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:25:06,637 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 07:25:06,637 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:25:06,658 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:25:06,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 07:25:06,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:06,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:25:06,666 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:25:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:06,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1389277550, now seen corresponding path program 1 times [2021-11-20 07:25:06,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:06,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30673586] [2021-11-20 07:25:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:06,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:06,876 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 07:25:06,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:25:06,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30673586] [2021-11-20 07:25:06,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30673586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:25:06,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:25:06,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:25:06,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165319458] [2021-11-20 07:25:06,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:25:06,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:25:06,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:25:06,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:25:06,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:25:06,923 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:25:06,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:25:06,942 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2021-11-20 07:25:06,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:25:06,947 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 07:25:06,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:25:06,956 INFO L225 Difference]: With dead ends: 50 [2021-11-20 07:25:06,956 INFO L226 Difference]: Without dead ends: 23 [2021-11-20 07:25:06,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:25:06,963 INFO L933 BasicCegarLoop]: 32 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, 32 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 07:25:06,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:25:06,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-20 07:25:06,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-20 07:25:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:25:07,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-20 07:25:07,003 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2021-11-20 07:25:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:25:07,003 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-20 07:25:07,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:25:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-20 07:25:07,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 07:25:07,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:07,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:25:07,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:25:07,006 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:25:07,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:07,007 INFO L85 PathProgramCache]: Analyzing trace with hash 796930410, now seen corresponding path program 1 times [2021-11-20 07:25:07,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:07,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338896179] [2021-11-20 07:25:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:07,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:07,094 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 07:25:07,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:25:07,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338896179] [2021-11-20 07:25:07,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338896179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:25:07,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:25:07,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:25:07,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855022639] [2021-11-20 07:25:07,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:25:07,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:25:07,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:25:07,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:25:07,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:25:07,099 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:25:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:25:07,181 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-11-20 07:25:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:25:07,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 07:25:07,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:25:07,183 INFO L225 Difference]: With dead ends: 53 [2021-11-20 07:25:07,183 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 07:25:07,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:25:07,185 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:25:07,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 17 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:25:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 07:25:07,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2021-11-20 07:25:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:25:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-20 07:25:07,194 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 16 [2021-11-20 07:25:07,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:25:07,195 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-20 07:25:07,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:25:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-20 07:25:07,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 07:25:07,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:07,196 INFO L514 BasicCegarLoop]: trace histogram [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 07:25:07,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:25:07,197 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:25:07,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:07,198 INFO L85 PathProgramCache]: Analyzing trace with hash 495241442, now seen corresponding path program 1 times [2021-11-20 07:25:07,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:07,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639179175] [2021-11-20 07:25:07,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:07,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:07,214 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:25:07,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442819355] [2021-11-20 07:25:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:07,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:07,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:25:07,217 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:25:07,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:25:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:07,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:25:07,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:25:07,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 07:25:07,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-20 07:25:07,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-20 07:25:07,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-20 07:25:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:25:07,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:25:08,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:25:08,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 70 [2021-11-20 07:25:08,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-11-20 07:25:08,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-11-20 07:25:08,449 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-11-20 07:25:08,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 49 [2021-11-20 07:25:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:25:08,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:25:08,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639179175] [2021-11-20 07:25:08,519 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:25:08,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442819355] [2021-11-20 07:25:08,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442819355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:25:08,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:25:08,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2021-11-20 07:25:08,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016559936] [2021-11-20 07:25:08,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:25:08,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:25:08,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:25:08,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:25:08,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:25:08,525 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:25:11,244 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 07:25:11,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:25:11,656 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2021-11-20 07:25:11,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:25:11,657 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-20 07:25:11,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:25:11,659 INFO L225 Difference]: With dead ends: 81 [2021-11-20 07:25:11,660 INFO L226 Difference]: Without dead ends: 79 [2021-11-20 07:25:11,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:25:11,662 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:25:11,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 106 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 216 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 07:25:11,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-20 07:25:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 52. [2021-11-20 07:25:11,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:25:11,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2021-11-20 07:25:11,684 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 24 [2021-11-20 07:25:11,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:25:11,685 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2021-11-20 07:25:11,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:25:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2021-11-20 07:25:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 07:25:11,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:11,688 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 07:25:11,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:25:11,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-20 07:25:11,905 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:25:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:11,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1411307230, now seen corresponding path program 2 times [2021-11-20 07:25:11,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:11,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504144252] [2021-11-20 07:25:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:11,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:11,922 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:25:11,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629545983] [2021-11-20 07:25:11,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:25:11,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:11,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:25:11,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:25:11,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:25:11,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:25:11,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:25:11,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:25:11,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:25:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:25:12,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:25:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:25:12,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:25:12,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504144252] [2021-11-20 07:25:12,194 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:25:12,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629545983] [2021-11-20 07:25:12,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629545983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:25:12,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:25:12,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 07:25:12,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705396200] [2021-11-20 07:25:12,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:25:12,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:25:12,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:25:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:25:12,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:25:12,202 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:25:12,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:25:12,425 INFO L93 Difference]: Finished difference Result 143 states and 171 transitions. [2021-11-20 07:25:12,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:25:12,426 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-20 07:25:12,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:25:12,434 INFO L225 Difference]: With dead ends: 143 [2021-11-20 07:25:12,434 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 07:25:12,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 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 07:25:12,439 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 68 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:25:12,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 48 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:25:12,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 07:25:12,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2021-11-20 07:25:12,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 68 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:25:12,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2021-11-20 07:25:12,467 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 28 [2021-11-20 07:25:12,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:25:12,467 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2021-11-20 07:25:12,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:25:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2021-11-20 07:25:12,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 07:25:12,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:12,472 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 07:25:12,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 07:25:12,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:12,674 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:25:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2120316834, now seen corresponding path program 3 times [2021-11-20 07:25:12,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:12,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534669645] [2021-11-20 07:25:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:12,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:12,683 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:25:12,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104999829] [2021-11-20 07:25:12,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:25:12,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:12,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:25:12,685 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:25:12,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:25:12,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:25:12,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:25:12,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 07:25:12,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:25:12,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 07:25:12,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 07:25:16,226 INFO L354 Elim1Store]: treesize reduction 121, result has 18.8 percent of original size [2021-11-20 07:25:16,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 128 [2021-11-20 07:25:39,411 INFO L354 Elim1Store]: treesize reduction 429, result has 16.0 percent of original size [2021-11-20 07:25:39,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 188 treesize of output 225 [2021-11-20 07:25:41,284 INFO L354 Elim1Store]: treesize reduction 126, result has 0.8 percent of original size [2021-11-20 07:25:41,284 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 215 treesize of output 162 [2021-11-20 07:25:41,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:25:53,683 INFO L354 Elim1Store]: treesize reduction 61, result has 4.7 percent of original size [2021-11-20 07:25:53,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 58 [2021-11-20 07:25:58,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 64 [2021-11-20 07:25:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:25:58,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:26:00,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:00,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 78 [2021-11-20 07:26:00,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-11-20 07:26:00,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-11-20 07:26:01,102 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-11-20 07:26:01,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 51 [2021-11-20 07:26:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:26:01,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:01,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534669645] [2021-11-20 07:26:01,248 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:26:01,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104999829] [2021-11-20 07:26:01,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104999829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:26:01,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:26:01,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-11-20 07:26:01,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508870083] [2021-11-20 07:26:01,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:26:01,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:26:01,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:01,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:26:01,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=512, Unknown=15, NotChecked=0, Total=650 [2021-11-20 07:26:01,251 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:01,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:01,702 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-11-20 07:26:01,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:26:01,702 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-20 07:26:01,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:01,703 INFO L225 Difference]: With dead ends: 78 [2021-11-20 07:26:01,703 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 07:26:01,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=132, Invalid=555, Unknown=15, NotChecked=0, Total=702 [2021-11-20 07:26:01,705 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:01,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 124 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 143 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2021-11-20 07:26:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 07:26:01,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-20 07:26:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.171875) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:01,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-11-20 07:26:01,718 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 28 [2021-11-20 07:26:01,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:01,718 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-11-20 07:26:01,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:01,719 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-11-20 07:26:01,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 07:26:01,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:01,720 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:01,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:01,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:01,949 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:01,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:01,949 INFO L85 PathProgramCache]: Analyzing trace with hash 9346140, now seen corresponding path program 4 times [2021-11-20 07:26:01,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:01,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729823472] [2021-11-20 07:26:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:01,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:01,969 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:26:01,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185673003] [2021-11-20 07:26:01,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:26:01,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:01,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:01,971 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:01,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:26:02,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:26:02,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:26:02,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:26:02,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:26:02,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:26:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:26:02,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:02,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729823472] [2021-11-20 07:26:02,245 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:26:02,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185673003] [2021-11-20 07:26:02,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185673003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:26:02,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:26:02,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 07:26:02,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341258482] [2021-11-20 07:26:02,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:26:02,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:26:02,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:02,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:26:02,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:26:02,248 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:02,485 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-11-20 07:26:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:26:02,486 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-20 07:26:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:02,487 INFO L225 Difference]: With dead ends: 82 [2021-11-20 07:26:02,487 INFO L226 Difference]: Without dead ends: 73 [2021-11-20 07:26:02,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 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 07:26:02,489 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:02,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 43 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:26:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-20 07:26:02,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2021-11-20 07:26:02,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:02,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-11-20 07:26:02,502 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 30 [2021-11-20 07:26:02,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:02,503 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-11-20 07:26:02,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:02,503 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-11-20 07:26:02,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 07:26:02,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:02,505 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 07:26:02,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:02,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:02,729 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:02,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:02,729 INFO L85 PathProgramCache]: Analyzing trace with hash -2147373800, now seen corresponding path program 5 times [2021-11-20 07:26:02,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:02,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476535435] [2021-11-20 07:26:02,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:02,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:02,739 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:26:02,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506989058] [2021-11-20 07:26:02,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:26:02,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:02,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:02,742 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:02,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:26:28,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 07:26:28,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:26:28,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:26:28,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:26:28,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:26:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:26:28,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:28,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476535435] [2021-11-20 07:26:28,552 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:26:28,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506989058] [2021-11-20 07:26:28,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506989058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:26:28,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:26:28,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 07:26:28,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499704238] [2021-11-20 07:26:28,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:26:28,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:26:28,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:28,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:26:28,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:26:28,555 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:28,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:28,870 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2021-11-20 07:26:28,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:26:28,871 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-20 07:26:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:28,872 INFO L225 Difference]: With dead ends: 135 [2021-11-20 07:26:28,872 INFO L226 Difference]: Without dead ends: 111 [2021-11-20 07:26:28,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 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 07:26:28,873 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 101 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:28,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 71 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:26:28,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-20 07:26:28,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 83. [2021-11-20 07:26:28,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 82 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2021-11-20 07:26:28,887 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 34 [2021-11-20 07:26:28,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:28,888 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2021-11-20 07:26:28,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:28,888 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2021-11-20 07:26:28,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 07:26:28,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:28,890 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 07:26:28,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:29,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:29,090 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:29,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:29,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1205583320, now seen corresponding path program 6 times [2021-11-20 07:26:29,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:29,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948950888] [2021-11-20 07:26:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:29,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:29,101 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:26:29,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616126518] [2021-11-20 07:26:29,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:26:29,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:29,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:29,103 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:29,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:26:29,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-20 07:26:29,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:26:29,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:26:29,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:26:29,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:26:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:26:29,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:29,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948950888] [2021-11-20 07:26:29,468 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:26:29,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616126518] [2021-11-20 07:26:29,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616126518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:26:29,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:26:29,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 07:26:29,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971581201] [2021-11-20 07:26:29,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:26:29,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:26:29,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:29,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:26:29,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:26:29,471 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:29,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:29,785 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2021-11-20 07:26:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:26:29,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-20 07:26:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:29,787 INFO L225 Difference]: With dead ends: 112 [2021-11-20 07:26:29,787 INFO L226 Difference]: Without dead ends: 91 [2021-11-20 07:26:29,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:26:29,788 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 98 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:29,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 87 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:26:29,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-20 07:26:29,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2021-11-20 07:26:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 67 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2021-11-20 07:26:29,799 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 34 [2021-11-20 07:26:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:29,799 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2021-11-20 07:26:29,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2021-11-20 07:26:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 07:26:29,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:29,801 INFO L514 BasicCegarLoop]: trace histogram [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 07:26:29,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:30,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:30,013 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:30,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:30,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1737020496, now seen corresponding path program 1 times [2021-11-20 07:26:30,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:30,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506296077] [2021-11-20 07:26:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:30,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:30,025 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:26:30,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53135601] [2021-11-20 07:26:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:30,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:30,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:30,030 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:30,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:26:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:30,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 07:26:30,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:30,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 07:26:30,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:30,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 99 [2021-11-20 07:26:30,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:26:30,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:30,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 44 [2021-11-20 07:26:30,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-20 07:26:30,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:30,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 99 [2021-11-20 07:26:30,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:26:30,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:30,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 48 [2021-11-20 07:26:30,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-20 07:26:30,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:30,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 99 [2021-11-20 07:26:30,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 41 [2021-11-20 07:26:30,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-20 07:26:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:26:30,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:26:32,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:32,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 79 [2021-11-20 07:26:32,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-11-20 07:26:32,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-11-20 07:26:32,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2021-11-20 07:26:32,607 INFO L354 Elim1Store]: treesize reduction 69, result has 26.6 percent of original size [2021-11-20 07:26:32,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 78 treesize of output 79 [2021-11-20 07:26:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:26:33,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:33,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506296077] [2021-11-20 07:26:33,181 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:26:33,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53135601] [2021-11-20 07:26:33,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53135601] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:26:33,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:26:33,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 30 [2021-11-20 07:26:33,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108313062] [2021-11-20 07:26:33,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:26:33,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 07:26:33,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:33,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 07:26:33,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-11-20 07:26:33,183 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:34,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:34,811 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2021-11-20 07:26:34,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:26:34,812 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 07:26:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:34,812 INFO L225 Difference]: With dead ends: 82 [2021-11-20 07:26:34,812 INFO L226 Difference]: Without dead ends: 55 [2021-11-20 07:26:34,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 07:26:34,814 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:34,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 237 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 07:26:34,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-20 07:26:34,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-11-20 07:26:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-11-20 07:26:34,825 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 36 [2021-11-20 07:26:34,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:34,826 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-11-20 07:26:34,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-11-20 07:26:34,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 07:26:34,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:34,830 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:34,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:35,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:35,037 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:35,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:35,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1201221586, now seen corresponding path program 7 times [2021-11-20 07:26:35,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:35,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302845951] [2021-11-20 07:26:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:35,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:35,044 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:26:35,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288666864] [2021-11-20 07:26:35,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:26:35,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:35,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:35,046 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:35,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:26:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:35,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 07:26:35,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:35,275 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:26:35,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 07:26:35,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 100 [2021-11-20 07:26:35,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 36 [2021-11-20 07:26:35,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:35,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-20 07:26:35,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:26:35,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,631 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-20 07:26:35,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 139 [2021-11-20 07:26:35,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:26:35,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:26:35,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:35,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 108 treesize of output 62 [2021-11-20 07:26:35,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:26:35,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,802 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-20 07:26:35,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 139 [2021-11-20 07:26:35,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:26:35,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:26:35,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 48 [2021-11-20 07:26:35,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:35,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:35,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 37 [2021-11-20 07:26:36,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:26:36,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,129 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-20 07:26:36,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 139 [2021-11-20 07:26:36,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:26:36,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:26:36,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 37 [2021-11-20 07:26:36,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:26:36,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,328 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-20 07:26:36,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 139 [2021-11-20 07:26:36,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:26:36,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 47 [2021-11-20 07:26:36,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:36,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 37 [2021-11-20 07:26:36,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:26:36,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,665 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-20 07:26:36,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 139 [2021-11-20 07:26:36,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:26:36,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:26:36,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:36,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 56 [2021-11-20 07:26:36,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:26:36,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,867 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-20 07:26:36,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 139 [2021-11-20 07:26:36,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:36,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:26:36,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 58 [2021-11-20 07:26:37,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:37,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:37,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:37,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:37,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 37 [2021-11-20 07:26:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:26:37,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:26:40,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:40,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 385 treesize of output 385 [2021-11-20 07:26:40,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-11-20 07:26:41,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-11-20 07:26:41,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 377 treesize of output 357 [2021-11-20 07:26:41,506 INFO L354 Elim1Store]: treesize reduction 112, result has 24.8 percent of original size [2021-11-20 07:26:41,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 244394 treesize of output 239407 [2021-11-20 07:26:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:26:46,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:46,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302845951] [2021-11-20 07:26:46,971 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:26:46,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288666864] [2021-11-20 07:26:46,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288666864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:26:46,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:26:46,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 44 [2021-11-20 07:26:46,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445707770] [2021-11-20 07:26:46,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:26:46,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-20 07:26:46,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:46,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-20 07:26:46,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 07:26:46,975 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:59,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:59,999 INFO L93 Difference]: Finished difference Result 174 states and 193 transitions. [2021-11-20 07:26:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-20 07:27:00,000 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-20 07:27:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:00,001 INFO L225 Difference]: With dead ends: 174 [2021-11-20 07:27:00,002 INFO L226 Difference]: Without dead ends: 172 [2021-11-20 07:27:00,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=642, Invalid=3780, Unknown=0, NotChecked=0, Total=4422 [2021-11-20 07:27:00,006 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 224 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:00,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 265 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-20 07:27:00,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-20 07:27:00,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 113. [2021-11-20 07:27:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1607142857142858) internal successors, (130), 112 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:00,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2021-11-20 07:27:00,026 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 40 [2021-11-20 07:27:00,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:00,026 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2021-11-20 07:27:00,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2021-11-20 07:27:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 07:27:00,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:00,028 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:00,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:00,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:27:00,245 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:00,245 INFO L85 PathProgramCache]: Analyzing trace with hash -933323380, now seen corresponding path program 8 times [2021-11-20 07:27:00,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:00,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646381557] [2021-11-20 07:27:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:00,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:00,253 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:27:00,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248103951] [2021-11-20 07:27:00,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:27:00,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:00,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:00,257 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:00,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:27:00,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:27:00,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:00,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:27:00,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:27:00,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:27:00,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:00,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646381557] [2021-11-20 07:27:00,643 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:27:00,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248103951] [2021-11-20 07:27:00,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248103951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:00,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:00,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-20 07:27:00,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161466435] [2021-11-20 07:27:00,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:00,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:27:00,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:00,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:27:00,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:27:00,645 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:00,997 INFO L93 Difference]: Finished difference Result 259 states and 292 transitions. [2021-11-20 07:27:00,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:27:00,999 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-20 07:27:00,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:01,000 INFO L225 Difference]: With dead ends: 259 [2021-11-20 07:27:01,000 INFO L226 Difference]: Without dead ends: 204 [2021-11-20 07:27:01,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:27:01,002 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 138 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:01,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 100 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:27:01,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-20 07:27:01,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 167. [2021-11-20 07:27:01,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1204819277108433) internal successors, (186), 166 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:01,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 186 transitions. [2021-11-20 07:27:01,025 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 186 transitions. Word has length 46 [2021-11-20 07:27:01,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:01,025 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 186 transitions. [2021-11-20 07:27:01,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:01,025 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 186 transitions. [2021-11-20 07:27:01,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 07:27:01,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:01,031 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:01,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:01,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 07:27:01,241 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:01,241 INFO L85 PathProgramCache]: Analyzing trace with hash -264017850, now seen corresponding path program 2 times [2021-11-20 07:27:01,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:01,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83686306] [2021-11-20 07:27:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:01,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:01,246 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:27:01,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247766808] [2021-11-20 07:27:01,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:27:01,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:01,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:01,264 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:01,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:27:01,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:27:01,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:01,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:27:01,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 07:27:01,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 07:27:01,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:01,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83686306] [2021-11-20 07:27:01,613 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:27:01,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247766808] [2021-11-20 07:27:01,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247766808] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:01,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:01,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-20 07:27:01,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386144316] [2021-11-20 07:27:01,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:01,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:27:01,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:01,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:27:01,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:27:01,614 INFO L87 Difference]: Start difference. First operand 167 states and 186 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:02,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:02,122 INFO L93 Difference]: Finished difference Result 202 states and 219 transitions. [2021-11-20 07:27:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:27:02,122 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-20 07:27:02,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:02,124 INFO L225 Difference]: With dead ends: 202 [2021-11-20 07:27:02,124 INFO L226 Difference]: Without dead ends: 154 [2021-11-20 07:27:02,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:27:02,125 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 162 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:02,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 142 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:27:02,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-20 07:27:02,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2021-11-20 07:27:02,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.096774193548387) internal successors, (136), 124 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-11-20 07:27:02,141 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 46 [2021-11-20 07:27:02,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:02,142 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-11-20 07:27:02,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:02,142 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-11-20 07:27:02,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:27:02,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:02,143 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 07:27:02,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:02,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 07:27:02,369 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:02,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1258986306, now seen corresponding path program 3 times [2021-11-20 07:27:02,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:02,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802775607] [2021-11-20 07:27:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:02,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:02,376 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:27:02,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029145241] [2021-11-20 07:27:02,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:27:02,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:02,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:02,378 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:02,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:27:02,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 07:27:02,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:02,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-20 07:27:02,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:02,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 07:27:02,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 07:27:15,664 INFO L354 Elim1Store]: treesize reduction 261, result has 17.1 percent of original size [2021-11-20 07:27:15,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 129 treesize of output 149 [2021-11-20 07:27:15,765 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-11-20 07:27:15,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 73 [2021-11-20 07:27:16,016 INFO L354 Elim1Store]: treesize reduction 249, result has 21.0 percent of original size [2021-11-20 07:27:16,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 129 treesize of output 161 [2021-11-20 07:27:16,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:27:16,184 INFO L354 Elim1Store]: treesize reduction 47, result has 25.4 percent of original size [2021-11-20 07:27:16,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 97 [2021-11-20 07:27:29,721 INFO L354 Elim1Store]: treesize reduction 426, result has 18.4 percent of original size [2021-11-20 07:27:29,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 194 treesize of output 244 [2021-11-20 07:27:29,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:27:30,168 INFO L354 Elim1Store]: treesize reduction 114, result has 12.3 percent of original size [2021-11-20 07:27:30,168 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 230 treesize of output 160 [2021-11-20 07:27:53,702 INFO L354 Elim1Store]: treesize reduction 229, result has 16.7 percent of original size [2021-11-20 07:27:53,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 137 treesize of output 153 [2021-11-20 07:27:53,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:27:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:27:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:27:53,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 45 [2021-11-20 07:28:02,019 INFO L354 Elim1Store]: treesize reduction 229, result has 16.7 percent of original size [2021-11-20 07:28:02,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 137 treesize of output 153 [2021-11-20 07:28:02,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:28:02,086 INFO L354 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2021-11-20 07:28:02,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 66 [2021-11-20 07:28:08,745 INFO L354 Elim1Store]: treesize reduction 248, result has 9.8 percent of original size [2021-11-20 07:28:08,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 137 treesize of output 134 [2021-11-20 07:28:08,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:08,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 44 [2021-11-20 07:28:28,986 INFO L354 Elim1Store]: treesize reduction 229, result has 16.7 percent of original size [2021-11-20 07:28:28,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 137 treesize of output 153 [2021-11-20 07:28:29,053 INFO L354 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2021-11-20 07:28:29,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 66 [2021-11-20 07:28:33,024 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-20 07:28:33,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 78 [2021-11-20 07:28:33,184 INFO L354 Elim1Store]: treesize reduction 221, result has 19.6 percent of original size [2021-11-20 07:28:33,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 137 treesize of output 161 [2021-11-20 07:28:33,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:33,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:33,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:33,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 49 [2021-11-20 07:28:33,335 INFO L354 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2021-11-20 07:28:33,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 86 [2021-11-20 07:29:21,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 76 [2021-11-20 07:29:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 34 refuted. 1 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:29:21,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:12,604 INFO L354 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2021-11-20 07:30:12,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 451 treesize of output 1 [2021-11-20 07:30:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:30:12,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:12,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802775607] [2021-11-20 07:30:12,618 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:30:12,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029145241] [2021-11-20 07:30:12,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029145241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:12,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:30:12,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 55 [2021-11-20 07:30:12,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995794650] [2021-11-20 07:30:12,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:12,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-20 07:30:12,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:12,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-20 07:30:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=2458, Unknown=59, NotChecked=0, Total=2970 [2021-11-20 07:30:12,620 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand has 55 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 55 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:48,036 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2021-11-20 07:30:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-20 07:30:48,037 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 55 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-20 07:30:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:48,038 INFO L225 Difference]: With dead ends: 140 [2021-11-20 07:30:48,039 INFO L226 Difference]: Without dead ends: 103 [2021-11-20 07:30:48,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 216.3s TimeCoverageRelationStatistics Valid=557, Invalid=3287, Unknown=62, NotChecked=0, Total=3906 [2021-11-20 07:30:48,040 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:48,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 181 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 218 Unchecked, 0.1s Time] [2021-11-20 07:30:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-20 07:30:48,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 90. [2021-11-20 07:30:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 89 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:48,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2021-11-20 07:30:48,059 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 48 [2021-11-20 07:30:48,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:48,059 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2021-11-20 07:30:48,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 55 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2021-11-20 07:30:48,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 07:30:48,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:48,060 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:48,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:48,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:48,268 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:48,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1044965384, now seen corresponding path program 9 times [2021-11-20 07:30:48,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:48,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514179784] [2021-11-20 07:30:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:48,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:48,276 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:30:48,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594206506] [2021-11-20 07:30:48,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:30:48,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:48,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:48,293 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:48,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:30:49,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 07:30:49,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:49,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:30:49,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:30:49,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:30:50,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:50,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514179784] [2021-11-20 07:30:50,119 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:30:50,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594206506] [2021-11-20 07:30:50,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594206506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:50,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:30:50,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-20 07:30:50,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349259208] [2021-11-20 07:30:50,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:50,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:30:50,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:50,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:30:50,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:30:50,121 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:50,534 INFO L93 Difference]: Finished difference Result 217 states and 236 transitions. [2021-11-20 07:30:50,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:30:50,535 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-20 07:30:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:50,536 INFO L225 Difference]: With dead ends: 217 [2021-11-20 07:30:50,536 INFO L226 Difference]: Without dead ends: 185 [2021-11-20 07:30:50,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:30:50,538 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 185 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:50,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 129 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:30:50,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-20 07:30:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 141. [2021-11-20 07:30:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1071428571428572) internal successors, (155), 140 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:50,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2021-11-20 07:30:50,559 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 50 [2021-11-20 07:30:50,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:50,559 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2021-11-20 07:30:50,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:50,560 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2021-11-20 07:30:50,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 07:30:50,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:50,561 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:50,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:50,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:50,765 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:50,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:50,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1326640320, now seen corresponding path program 4 times [2021-11-20 07:30:50,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:50,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671217307] [2021-11-20 07:30:50,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:50,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:50,784 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:30:50,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282306751] [2021-11-20 07:30:50,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:30:50,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:50,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:50,786 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:50,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a3571a2-7d68-47d0-81fa-42ee3786586a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:30:51,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:30:51,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:51,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-20 07:30:51,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:51,295 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:30:51,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 07:30:51,363 INFO L354 Elim1Store]: treesize reduction 118, result has 20.8 percent of original size [2021-11-20 07:30:51,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 100 [2021-11-20 07:30:51,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 25 [2021-11-20 07:30:51,504 INFO L354 Elim1Store]: treesize reduction 162, result has 16.9 percent of original size [2021-11-20 07:30:51,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 97 [2021-11-20 07:30:51,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 29 [2021-11-20 07:30:51,657 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-20 07:30:51,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-11-20 07:30:51,865 INFO L354 Elim1Store]: treesize reduction 611, result has 12.2 percent of original size [2021-11-20 07:30:51,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 108 treesize of output 147 [2021-11-20 07:30:51,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:30:51,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 59 [2021-11-20 07:30:52,170 INFO L354 Elim1Store]: treesize reduction 619, result has 11.1 percent of original size [2021-11-20 07:30:52,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 108 treesize of output 139 [2021-11-20 07:30:52,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 67 [2021-11-20 07:30:52,448 INFO L354 Elim1Store]: treesize reduction 685, result has 11.5 percent of original size [2021-11-20 07:30:52,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 116 treesize of output 153 [2021-11-20 07:30:52,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 40 [2021-11-20 07:30:52,635 INFO L354 Elim1Store]: treesize reduction 144, result has 15.3 percent of original size [2021-11-20 07:30:52,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 49 [2021-11-20 07:30:52,890 INFO L354 Elim1Store]: treesize reduction 617, result has 11.4 percent of original size [2021-11-20 07:30:52,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 108 treesize of output 141 [2021-11-20 07:30:52,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 41 [2021-11-20 07:30:53,146 INFO L354 Elim1Store]: treesize reduction 609, result has 12.5 percent of original size [2021-11-20 07:30:53,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 108 treesize of output 149 [2021-11-20 07:30:53,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:30:53,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 59 [2021-11-20 07:30:53,483 INFO L354 Elim1Store]: treesize reduction 681, result has 12.0 percent of original size [2021-11-20 07:30:53,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 114 treesize of output 155 [2021-11-20 07:30:53,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:53,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 70 [2021-11-20 07:30:53,707 INFO L354 Elim1Store]: treesize reduction 144, result has 15.3 percent of original size [2021-11-20 07:30:53,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 49 [2021-11-20 07:30:53,975 INFO L354 Elim1Store]: treesize reduction 611, result has 12.2 percent of original size [2021-11-20 07:30:53,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 108 treesize of output 147 [2021-11-20 07:30:54,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:30:54,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 59 [2021-11-20 07:30:54,313 INFO L354 Elim1Store]: treesize reduction 707, result has 11.6 percent of original size [2021-11-20 07:30:54,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 116 treesize of output 155 [2021-11-20 07:30:54,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 50 [2021-11-20 07:30:54,617 INFO L354 Elim1Store]: treesize reduction 773, result has 12.0 percent of original size [2021-11-20 07:30:54,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 122 treesize of output 167 [2021-11-20 07:30:54,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:54,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 47 [2021-11-20 07:30:54,861 INFO L354 Elim1Store]: treesize reduction 144, result has 15.3 percent of original size [2021-11-20 07:30:54,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 49 [2021-11-20 07:30:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:55,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:18,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:31:18,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 971 treesize of output 971 [2021-11-20 07:31:18,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-11-20 07:31:18,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-11-20 07:31:18,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 963 treesize of output 927 [2021-11-20 07:31:18,906 INFO L354 Elim1Store]: treesize reduction 167, result has 22.7 percent of original size [2021-11-20 07:31:18,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 739903004880 treesize of output 726381844527