./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL --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 c28ec531d32a995842654b11d319d79f5f6e1bd0d3e33d9bd3cc173d0787760c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:27:33,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:27:33,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:27:33,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:27:33,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:27:33,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:27:33,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:27:33,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:27:33,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:27:33,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:27:33,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:27:33,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:27:33,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:27:33,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:27:33,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:27:33,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:27:33,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:27:33,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:27:33,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:27:33,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:27:33,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:27:33,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:27:33,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:27:33,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:27:33,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:27:33,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:27:33,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:27:33,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:27:33,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:27:33,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:27:33,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:27:33,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:27:33,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:27:33,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:27:33,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:27:33,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:27:33,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:27:33,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:27:33,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:27:33,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:27:33,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:27:33,446 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 05:27:33,502 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:27:33,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:27:33,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:27:33,504 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:27:33,513 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:27:33,514 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:27:33,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:27:33,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:27:33,516 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:27:33,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:27:33,518 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:27:33,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:27:33,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:27:33,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:27:33,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:27:33,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:27:33,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:27:33,520 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:27:33,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:27:33,521 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:27:33,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:27:33,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:27:33,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:27:33,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:27:33,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:27:33,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:27:33,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:27:33,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:27:33,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:27:33,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:27:33,527 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:27:33,527 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:27:33,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:27:33,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:27:33,528 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_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c28ec531d32a995842654b11d319d79f5f6e1bd0d3e33d9bd3cc173d0787760c [2021-11-19 05:27:33,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:27:33,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:27:33,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:27:33,968 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:27:33,969 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:27:33,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-fpi/ifeqn3.c [2021-11-19 05:27:34,057 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/data/e5b3d85fc/e13cb00f718e45258351c0d1e4cae67a/FLAGb99669e39 [2021-11-19 05:27:34,749 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:27:34,750 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/sv-benchmarks/c/array-fpi/ifeqn3.c [2021-11-19 05:27:34,760 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/data/e5b3d85fc/e13cb00f718e45258351c0d1e4cae67a/FLAGb99669e39 [2021-11-19 05:27:35,082 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/data/e5b3d85fc/e13cb00f718e45258351c0d1e4cae67a [2021-11-19 05:27:35,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:27:35,088 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:27:35,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:27:35,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:27:35,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:27:35,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:27:35" (1/1) ... [2021-11-19 05:27:35,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27efda2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:35, skipping insertion in model container [2021-11-19 05:27:35,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:27:35" (1/1) ... [2021-11-19 05:27:35,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:27:35,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:27:35,330 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_5855e5ae-c763-46da-9a90-476a482ec5b9/sv-benchmarks/c/array-fpi/ifeqn3.c[589,602] [2021-11-19 05:27:35,355 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:27:35,366 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:27:35,381 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_5855e5ae-c763-46da-9a90-476a482ec5b9/sv-benchmarks/c/array-fpi/ifeqn3.c[589,602] [2021-11-19 05:27:35,393 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:27:35,410 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:27:35,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:35 WrapperNode [2021-11-19 05:27:35,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:27:35,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:27:35,413 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:27:35,413 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:27:35,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:35" (1/1) ... [2021-11-19 05:27:35,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:35" (1/1) ... [2021-11-19 05:27:35,459 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-11-19 05:27:35,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:27:35,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:27:35,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:27:35,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:27:35,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:35" (1/1) ... [2021-11-19 05:27:35,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:35" (1/1) ... [2021-11-19 05:27:35,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:35" (1/1) ... [2021-11-19 05:27:35,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:35" (1/1) ... [2021-11-19 05:27:35,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:35" (1/1) ... [2021-11-19 05:27:35,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:35" (1/1) ... [2021-11-19 05:27:35,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:35" (1/1) ... [2021-11-19 05:27:35,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:27:35,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:27:35,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:27:35,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:27:35,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:35" (1/1) ... [2021-11-19 05:27:35,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:27:35,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:35,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:27:35,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:27:35,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:27:35,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:27:35,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:27:35,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 05:27:35,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:27:35,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:27:35,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:27:35,705 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:27:35,707 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:27:35,950 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:27:35,958 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:27:35,958 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 05:27:35,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:27:35 BoogieIcfgContainer [2021-11-19 05:27:35,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:27:35,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:27:35,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:27:35,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:27:35,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:27:35" (1/3) ... [2021-11-19 05:27:35,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1936c4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:27:35, skipping insertion in model container [2021-11-19 05:27:35,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:35" (2/3) ... [2021-11-19 05:27:35,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1936c4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:27:35, skipping insertion in model container [2021-11-19 05:27:35,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:27:35" (3/3) ... [2021-11-19 05:27:35,972 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn3.c [2021-11-19 05:27:35,979 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:27:35,979 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:27:36,057 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:27:36,074 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 [2021-11-19 05:27:36,074 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:27:36,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:36,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 05:27:36,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:36,113 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:36,114 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:36,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:36,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-11-19 05:27:36,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:36,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697296591] [2021-11-19 05:27:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:36,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:36,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:36,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697296591] [2021-11-19 05:27:36,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697296591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:36,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:27:36,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:27:36,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749554134] [2021-11-19 05:27:36,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:36,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 05:27:36,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:36,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 05:27:36,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 05:27:36,511 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:36,541 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-11-19 05:27:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 05:27:36,544 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-19 05:27:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:36,554 INFO L225 Difference]: With dead ends: 42 [2021-11-19 05:27:36,554 INFO L226 Difference]: Without dead ends: 19 [2021-11-19 05:27:36,558 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 [2021-11-19 05:27:36,563 INFO L933 BasicCegarLoop]: 28 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, 28 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 [2021-11-19 05:27:36,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:27:36,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-19 05:27:36,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-19 05:27:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-19 05:27:36,605 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-11-19 05:27:36,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:36,606 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-19 05:27:36,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:36,607 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-19 05:27:36,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 05:27:36,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:36,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:36,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:27:36,610 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:36,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:36,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-11-19 05:27:36,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:36,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806645637] [2021-11-19 05:27:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:36,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:36,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:36,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806645637] [2021-11-19 05:27:36,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806645637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:36,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:27:36,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:27:36,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815014067] [2021-11-19 05:27:36,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:36,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:27:36,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:36,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:27:36,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:27:36,718 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:36,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:36,826 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-11-19 05:27:36,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:27:36,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-19 05:27:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:36,829 INFO L225 Difference]: With dead ends: 45 [2021-11-19 05:27:36,829 INFO L226 Difference]: Without dead ends: 31 [2021-11-19 05:27:36,830 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 [2021-11-19 05:27:36,832 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:36,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:27:36,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-19 05:27:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-11-19 05:27:36,863 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) [2021-11-19 05:27:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-19 05:27:36,866 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-19 05:27:36,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:36,867 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-19 05:27:36,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:36,869 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-19 05:27:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 05:27:36,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:36,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:36,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:27:36,875 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:36,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-11-19 05:27:36,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:36,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501391206] [2021-11-19 05:27:36,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:36,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:36,952 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:27:36,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687390065] [2021-11-19 05:27:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:36,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:36,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:36,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:36,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:27:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:37,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:27:37,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:37,149 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 [2021-11-19 05:27:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:27:37,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:27:37,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:37,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501391206] [2021-11-19 05:27:37,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:27:37,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687390065] [2021-11-19 05:27:37,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687390065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:37,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:27:37,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 05:27:37,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301199465] [2021-11-19 05:27:37,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:37,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:27:37,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:37,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:27:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:27:37,300 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:37,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:37,437 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-11-19 05:27:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:27:37,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-19 05:27:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:37,440 INFO L225 Difference]: With dead ends: 40 [2021-11-19 05:27:37,440 INFO L226 Difference]: Without dead ends: 38 [2021-11-19 05:27:37,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:27:37,443 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:37,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:27:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-19 05:27:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-11-19 05:27:37,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-19 05:27:37,476 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-11-19 05:27:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:37,477 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-19 05:27:37,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-19 05:27:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 05:27:37,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:37,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:37,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 05:27:37,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:37,701 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:37,702 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2021-11-19 05:27:37,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:37,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482054456] [2021-11-19 05:27:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:37,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:37,742 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:27:37,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389983494] [2021-11-19 05:27:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:37,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:37,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:37,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:37,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:27:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:37,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:27:37,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:37,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:27:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:38,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:38,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482054456] [2021-11-19 05:27:38,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:27:38,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389983494] [2021-11-19 05:27:38,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389983494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:27:38,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:27:38,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-19 05:27:38,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482519478] [2021-11-19 05:27:38,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:27:38,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:27:38,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:38,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:27:38,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:27:38,086 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:38,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:38,324 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-11-19 05:27:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:27:38,325 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-19 05:27:38,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:38,327 INFO L225 Difference]: With dead ends: 70 [2021-11-19 05:27:38,333 INFO L226 Difference]: Without dead ends: 43 [2021-11-19 05:27:38,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:27:38,335 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:38,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:27:38,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-19 05:27:38,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2021-11-19 05:27:38,342 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) [2021-11-19 05:27:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-19 05:27:38,343 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2021-11-19 05:27:38,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:38,344 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-19 05:27:38,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:38,344 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-19 05:27:38,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 05:27:38,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:38,346 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:38,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:38,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:38,563 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:38,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:38,564 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2021-11-19 05:27:38,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:38,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38287078] [2021-11-19 05:27:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:38,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:38,594 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:27:38,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395768560] [2021-11-19 05:27:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:38,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:38,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:38,596 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:38,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:27:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:38,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 05:27:38,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:38,889 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 [2021-11-19 05:27:39,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:39,084 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-19 05:27:39,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-11-19 05:27:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:27:39,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:27:43,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:27:43,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 115 [2021-11-19 05:27:43,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-19 05:27:43,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:27:43,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 289 treesize of output 266 [2021-11-19 05:27:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:27:43,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:43,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38287078] [2021-11-19 05:27:43,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:27:43,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395768560] [2021-11-19 05:27:43,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395768560] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:27:43,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:27:43,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-19 05:27:43,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868916077] [2021-11-19 05:27:43,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:27:43,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 05:27:43,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:43,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 05:27:43,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=112, Unknown=2, NotChecked=0, Total=156 [2021-11-19 05:27:43,577 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:43,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:43,799 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2021-11-19 05:27:43,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:27:43,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-19 05:27:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:43,802 INFO L225 Difference]: With dead ends: 50 [2021-11-19 05:27:43,802 INFO L226 Difference]: Without dead ends: 38 [2021-11-19 05:27:43,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=59, Invalid=149, Unknown=2, NotChecked=0, Total=210 [2021-11-19 05:27:43,803 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:43,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 65 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2021-11-19 05:27:43,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-19 05:27:43,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-11-19 05:27:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-11-19 05:27:43,815 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2021-11-19 05:27:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:43,816 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-11-19 05:27:43,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-11-19 05:27:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 05:27:43,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:43,818 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:43,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-19 05:27:44,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:44,035 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:44,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:44,036 INFO L85 PathProgramCache]: Analyzing trace with hash -672376363, now seen corresponding path program 2 times [2021-11-19 05:27:44,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:44,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317773746] [2021-11-19 05:27:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:44,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:44,085 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:27:44,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827580632] [2021-11-19 05:27:44,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:27:44,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:44,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:44,101 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:44,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:27:44,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:27:44,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:27:44,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:27:44,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:44,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:27:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:44,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:44,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317773746] [2021-11-19 05:27:44,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:27:44,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827580632] [2021-11-19 05:27:44,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827580632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:27:44,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:27:44,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-19 05:27:44,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227250311] [2021-11-19 05:27:44,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:27:44,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:27:44,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:44,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:27:44,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:27:44,446 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:44,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:44,713 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-11-19 05:27:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:27:44,714 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-19 05:27:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:44,717 INFO L225 Difference]: With dead ends: 98 [2021-11-19 05:27:44,718 INFO L226 Difference]: Without dead ends: 83 [2021-11-19 05:27:44,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:27:44,723 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 86 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:44,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 66 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:27:44,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-19 05:27:44,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2021-11-19 05:27:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 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) [2021-11-19 05:27:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-11-19 05:27:44,744 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2021-11-19 05:27:44,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:44,745 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-11-19 05:27:44,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-11-19 05:27:44,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 05:27:44,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:44,747 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:44,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:44,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-19 05:27:44,972 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:44,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:44,973 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2021-11-19 05:27:44,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:44,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303541309] [2021-11-19 05:27:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:44,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:45,011 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:27:45,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181153208] [2021-11-19 05:27:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:45,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:45,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:45,013 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:45,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 05:27:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:45,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 05:27:45,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:45,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:27:45,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-19 05:27:45,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:45,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-11-19 05:27:45,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:45,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-19 05:27:45,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:45,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:45,634 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-19 05:27:45,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 42 [2021-11-19 05:27:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:45,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:27:46,883 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 63 treesize of output 61 [2021-11-19 05:27:46,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 60 [2021-11-19 05:27:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:46,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:46,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303541309] [2021-11-19 05:27:46,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:27:46,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181153208] [2021-11-19 05:27:46,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181153208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:27:46,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:27:46,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-19 05:27:46,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201911134] [2021-11-19 05:27:46,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:27:46,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 05:27:46,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:46,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 05:27:46,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-11-19 05:27:46,967 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 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) [2021-11-19 05:27:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:52,216 INFO L93 Difference]: Finished difference Result 210 states and 248 transitions. [2021-11-19 05:27:52,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 05:27:52,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 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 [2021-11-19 05:27:52,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:52,220 INFO L225 Difference]: With dead ends: 210 [2021-11-19 05:27:52,220 INFO L226 Difference]: Without dead ends: 143 [2021-11-19 05:27:52,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=388, Invalid=1334, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 05:27:52,223 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 185 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:52,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 196 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 332 Invalid, 0 Unknown, 59 Unchecked, 1.7s Time] [2021-11-19 05:27:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-19 05:27:52,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 89. [2021-11-19 05:27:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 88 states have internal predecessors, (109), 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) [2021-11-19 05:27:52,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2021-11-19 05:27:52,251 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 28 [2021-11-19 05:27:52,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:52,252 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2021-11-19 05:27:52,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 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) [2021-11-19 05:27:52,252 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2021-11-19 05:27:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 05:27:52,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:52,254 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:52,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:52,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:52,472 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:52,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1487245307, now seen corresponding path program 3 times [2021-11-19 05:27:52,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:52,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625895240] [2021-11-19 05:27:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:52,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:52,512 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:27:52,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048296318] [2021-11-19 05:27:52,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:27:52,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:52,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:52,520 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:52,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 05:27:52,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-19 05:27:52,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:27:52,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 05:27:52,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:53,153 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 [2021-11-19 05:27:53,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:53,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:53,346 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-19 05:27:53,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 229 treesize of output 397 [2021-11-19 05:27:53,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:53,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:53,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:53,517 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-19 05:27:53,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 291 treesize of output 187 [2021-11-19 05:27:53,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:53,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:53,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:53,646 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-19 05:27:53,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 195 treesize of output 104 [2021-11-19 05:27:53,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:53,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:53,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:53,699 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-19 05:27:53,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 171 treesize of output 102 [2021-11-19 05:27:53,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:53,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:53,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:53,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:53,996 INFO L354 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2021-11-19 05:27:53,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 242 treesize of output 454 [2021-11-19 05:27:54,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:54,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:54,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:54,144 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-19 05:27:54,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 381 treesize of output 237 [2021-11-19 05:27:54,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:27:54,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:54,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:54,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:54,445 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-19 05:27:54,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 385 treesize of output 240 [2021-11-19 05:27:54,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:54,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:54,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:54,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:27:54,593 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-19 05:27:54,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 228 treesize of output 105 [2021-11-19 05:27:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:27:54,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:28:34,123 WARN L227 SmtUtils]: Spent 35.89s on a formula simplification. DAG size of input: 93 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:28:38,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:28:38,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1860 treesize of output 1732 [2021-11-19 05:28:38,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:38,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 820 treesize of output 726 [2021-11-19 05:28:38,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:38,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:38,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 566 treesize of output 494 [2021-11-19 05:28:39,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:39,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 827 treesize of output 634 [2021-11-19 05:28:39,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1034 treesize of output 900 [2021-11-19 05:28:39,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 820 treesize of output 726 [2021-11-19 05:28:39,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:28:39,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1208 treesize of output 1120 [2021-11-19 05:28:39,522 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-19 05:28:39,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 220 [2021-11-19 05:28:39,547 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-19 05:28:39,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2743 treesize of output 2440 [2021-11-19 05:28:39,720 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-19 05:28:39,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 494 treesize of output 1 [2021-11-19 05:28:39,794 INFO L354 Elim1Store]: treesize reduction 144, result has 0.7 percent of original size [2021-11-19 05:28:39,795 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 16528 treesize of output 1 [2021-11-19 05:28:39,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 260 treesize of output 220 [2021-11-19 05:28:39,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:39,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:28:42,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:42,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625895240] [2021-11-19 05:28:42,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:28:42,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048296318] [2021-11-19 05:28:42,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048296318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:28:42,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:28:42,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 29 [2021-11-19 05:28:42,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487177770] [2021-11-19 05:28:42,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:28:42,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 05:28:42,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:42,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 05:28:42,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=636, Unknown=2, NotChecked=0, Total=812 [2021-11-19 05:28:42,033 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 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) [2021-11-19 05:28:53,553 WARN L227 SmtUtils]: Spent 7.54s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:28:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:54,437 INFO L93 Difference]: Finished difference Result 185 states and 234 transitions. [2021-11-19 05:28:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:28:54,438 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 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 [2021-11-19 05:28:54,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:54,439 INFO L225 Difference]: With dead ends: 185 [2021-11-19 05:28:54,440 INFO L226 Difference]: Without dead ends: 145 [2021-11-19 05:28:54,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 57.6s TimeCoverageRelationStatistics Valid=486, Invalid=1863, Unknown=3, NotChecked=0, Total=2352 [2021-11-19 05:28:54,442 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:54,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 54 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 161 Invalid, 0 Unknown, 112 Unchecked, 0.4s Time] [2021-11-19 05:28:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-19 05:28:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 129. [2021-11-19 05:28:54,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.2734375) internal successors, (163), 128 states have internal predecessors, (163), 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) [2021-11-19 05:28:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 163 transitions. [2021-11-19 05:28:54,490 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 163 transitions. Word has length 30 [2021-11-19 05:28:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:54,491 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 163 transitions. [2021-11-19 05:28:54,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 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) [2021-11-19 05:28:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 163 transitions. [2021-11-19 05:28:54,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 05:28:54,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:54,496 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:54,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-19 05:28:54,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:54,702 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:54,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1708848056, now seen corresponding path program 2 times [2021-11-19 05:28:54,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:54,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285164224] [2021-11-19 05:28:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:54,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:54,754 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:28:54,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478990962] [2021-11-19 05:28:54,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:28:54,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:54,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:54,764 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:54,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 05:28:54,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:28:54,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:28:54,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 05:28:54,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 05:28:55,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:28:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 05:28:55,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:55,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285164224] [2021-11-19 05:28:55,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:28:55,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478990962] [2021-11-19 05:28:55,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478990962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:28:55,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:28:55,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-19 05:28:55,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85328407] [2021-11-19 05:28:55,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:28:55,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 05:28:55,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:55,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 05:28:55,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:28:55,240 INFO L87 Difference]: Start difference. First operand 129 states and 163 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-11-19 05:28:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:55,661 INFO L93 Difference]: Finished difference Result 291 states and 357 transitions. [2021-11-19 05:28:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 05:28:55,662 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) Word has length 37 [2021-11-19 05:28:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:55,664 INFO L225 Difference]: With dead ends: 291 [2021-11-19 05:28:55,665 INFO L226 Difference]: Without dead ends: 219 [2021-11-19 05:28:55,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:28:55,667 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 147 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:55,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 110 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:28:55,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-19 05:28:55,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 168. [2021-11-19 05:28:55,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.2574850299401197) internal successors, (210), 167 states have internal predecessors, (210), 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) [2021-11-19 05:28:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 210 transitions. [2021-11-19 05:28:55,690 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 210 transitions. Word has length 37 [2021-11-19 05:28:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:55,691 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 210 transitions. [2021-11-19 05:28:55,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-11-19 05:28:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 210 transitions. [2021-11-19 05:28:55,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 05:28:55,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:55,694 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:55,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:55,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:55,920 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:55,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:55,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1173959464, now seen corresponding path program 3 times [2021-11-19 05:28:55,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:55,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849064800] [2021-11-19 05:28:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:55,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:55,959 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:28:55,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669333533] [2021-11-19 05:28:55,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:28:55,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:55,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:55,969 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:55,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 05:28:56,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-19 05:28:56,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:28:56,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 05:28:56,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:28:56,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:28:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:28:56,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:56,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849064800] [2021-11-19 05:28:56,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:28:56,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669333533] [2021-11-19 05:28:56,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669333533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:28:56,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:28:56,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-11-19 05:28:56,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955015195] [2021-11-19 05:28:56,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:28:56,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:28:56,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:56,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:28:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:28:56,818 INFO L87 Difference]: Start difference. First operand 168 states and 210 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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) [2021-11-19 05:28:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:57,803 INFO L93 Difference]: Finished difference Result 211 states and 251 transitions. [2021-11-19 05:28:57,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:28:57,804 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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 37 [2021-11-19 05:28:57,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:57,805 INFO L225 Difference]: With dead ends: 211 [2021-11-19 05:28:57,806 INFO L226 Difference]: Without dead ends: 202 [2021-11-19 05:28:57,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=450, Invalid=1530, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 05:28:57,808 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:57,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 127 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:28:57,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-19 05:28:57,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 168. [2021-11-19 05:28:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.2455089820359282) internal successors, (208), 167 states have internal predecessors, (208), 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) [2021-11-19 05:28:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2021-11-19 05:28:57,844 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 37 [2021-11-19 05:28:57,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:57,847 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2021-11-19 05:28:57,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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) [2021-11-19 05:28:57,848 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2021-11-19 05:28:57,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 05:28:57,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:57,859 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:57,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:58,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 05:28:58,084 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:58,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 4 times [2021-11-19 05:28:58,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:58,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600653077] [2021-11-19 05:28:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:58,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:58,117 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:28:58,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058835044] [2021-11-19 05:28:58,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:28:58,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:58,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:58,125 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:58,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5855e5ae-c763-46da-9a90-476a482ec5b9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 05:28:58,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:28:58,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:28:58,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-19 05:28:58,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:58,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:28:58,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-19 05:28:58,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:58,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 245 [2021-11-19 05:28:58,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 45 [2021-11-19 05:28:58,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:28:58,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 50 [2021-11-19 05:28:58,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 37 [2021-11-19 05:28:58,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:58,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-11-19 05:28:59,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-19 05:28:59,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:59,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:59,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:59,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:59,266 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-11-19 05:28:59,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 30 case distinctions, treesize of input 254 treesize of output 506 [2021-11-19 05:28:59,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:28:59,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:59,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:59,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 134 [2021-11-19 05:28:59,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:59,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:59,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 172 [2021-11-19 05:28:59,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:59,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:59,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:59,637 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-19 05:28:59,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 238 treesize of output 134 [2021-11-19 05:28:59,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:59,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:28:59,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:59,851 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-19 05:28:59,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 69 treesize of output 66 [2021-11-19 05:29:00,482 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-19 05:29:00,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 92 treesize of output 48 [2021-11-19 05:29:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:29:00,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:29:10,660 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 25264 treesize of output 24192 [2021-11-19 05:29:11,296 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-19 05:29:11,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 10954 treesize of output 8942 [2021-11-19 05:29:20,465 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 427362 treesize of output 410210 [2021-11-19 05:29:21,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:29:21,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 472802 treesize of output 405490 [2021-11-19 05:29:38,018 WARN L227 SmtUtils]: Spent 16.53s on a formula simplification. DAG size of input: 593 DAG size of output: 591 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)