./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_3.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_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/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_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/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_c2b3ed6d-8ba3-421f-9d64-acb341596115/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 a8f602fe3f26a1a48cfc4520a058a139a989329a9c65c27b1560937231a92c27 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:35:33,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:35:33,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:35:33,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:35:33,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:35:33,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:35:33,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:35:33,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:35:33,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:35:33,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:35:33,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:35:33,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:35:33,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:35:33,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:35:33,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:35:33,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:35:33,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:35:33,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:35:33,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:35:33,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:35:33,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:35:33,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:35:33,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:35:33,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:35:33,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:35:33,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:35:33,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:35:33,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:35:33,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:35:33,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:35:33,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:35:33,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:35:33,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:35:33,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:35:33,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:35:33,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:35:33,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:35:33,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:35:33,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:35:33,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:35:33,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:35:33,446 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 05:35:33,481 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:35:33,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:35:33,482 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:35:33,482 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:35:33,483 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:35:33,484 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:35:33,485 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:35:33,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:35:33,486 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:35:33,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:35:33,487 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:35:33,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:35:33,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:35:33,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:35:33,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:35:33,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:35:33,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:35:33,489 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:35:33,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:35:33,490 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:35:33,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:35:33,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:35:33,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:35:33,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:35:33,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:35:33,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:35:33,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:35:33,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:35:33,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:35:33,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:35:33,495 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:35:33,496 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:35:33,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:35:33,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:35:33,497 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_c2b3ed6d-8ba3-421f-9d64-acb341596115/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8f602fe3f26a1a48cfc4520a058a139a989329a9c65c27b1560937231a92c27 [2021-11-19 05:35:33,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:35:33,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:35:33,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:35:33,895 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:35:33,896 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:35:33,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-programs/partial_mod_count_3.c [2021-11-19 05:35:34,004 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/data/291521f2c/28ab778f778e4fbb96a2f59c81c31c38/FLAGab6205aa4 [2021-11-19 05:35:34,609 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:35:34,610 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/sv-benchmarks/c/array-programs/partial_mod_count_3.c [2021-11-19 05:35:34,616 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/data/291521f2c/28ab778f778e4fbb96a2f59c81c31c38/FLAGab6205aa4 [2021-11-19 05:35:34,951 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/data/291521f2c/28ab778f778e4fbb96a2f59c81c31c38 [2021-11-19 05:35:34,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:35:34,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:35:34,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:35:34,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:35:34,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:35:34,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:35:34" (1/1) ... [2021-11-19 05:35:34,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@472230a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:34, skipping insertion in model container [2021-11-19 05:35:34,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:35:34" (1/1) ... [2021-11-19 05:35:34,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:35:34,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:35:35,167 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_c2b3ed6d-8ba3-421f-9d64-acb341596115/sv-benchmarks/c/array-programs/partial_mod_count_3.c[323,336] [2021-11-19 05:35:35,183 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:35:35,193 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:35:35,207 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_c2b3ed6d-8ba3-421f-9d64-acb341596115/sv-benchmarks/c/array-programs/partial_mod_count_3.c[323,336] [2021-11-19 05:35:35,216 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:35:35,233 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:35:35,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:35 WrapperNode [2021-11-19 05:35:35,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:35:35,235 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:35:35,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:35:35,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:35:35,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:35" (1/1) ... [2021-11-19 05:35:35,255 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:35" (1/1) ... [2021-11-19 05:35:35,293 INFO L137 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2021-11-19 05:35:35,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:35:35,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:35:35,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:35:35,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:35:35,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:35" (1/1) ... [2021-11-19 05:35:35,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:35" (1/1) ... [2021-11-19 05:35:35,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:35" (1/1) ... [2021-11-19 05:35:35,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:35" (1/1) ... [2021-11-19 05:35:35,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:35" (1/1) ... [2021-11-19 05:35:35,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:35" (1/1) ... [2021-11-19 05:35:35,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:35" (1/1) ... [2021-11-19 05:35:35,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:35:35,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:35:35,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:35:35,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:35:35,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:35" (1/1) ... [2021-11-19 05:35:35,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:35:35,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:35,378 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:35:35,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:35:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:35:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:35:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:35:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:35:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:35:35,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:35:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:35:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 05:35:35,498 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:35:35,500 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:35:35,657 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:35:35,664 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:35:35,665 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 05:35:35,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:35:35 BoogieIcfgContainer [2021-11-19 05:35:35,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:35:35,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:35:35,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:35:35,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:35:35,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:35:34" (1/3) ... [2021-11-19 05:35:35,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2865bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:35:35, skipping insertion in model container [2021-11-19 05:35:35,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:35" (2/3) ... [2021-11-19 05:35:35,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2865bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:35:35, skipping insertion in model container [2021-11-19 05:35:35,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:35:35" (3/3) ... [2021-11-19 05:35:35,678 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_3.c [2021-11-19 05:35:35,684 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:35:35,684 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:35:35,784 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:35:35,793 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 05:35:35,793 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:35:35,811 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:35:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 05:35:35,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:35,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:35,819 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:35,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:35,826 INFO L85 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2021-11-19 05:35:35,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:35,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608453502] [2021-11-19 05:35:35,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:35,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:36,051 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 05:35:36,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:36,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608453502] [2021-11-19 05:35:36,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608453502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:36,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:36,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:35:36,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664090799] [2021-11-19 05:35:36,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:36,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 05:35:36,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:36,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 05:35:36,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 05:35:36,116 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 05:35:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:36,144 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-11-19 05:35:36,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 05:35:36,147 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-11-19 05:35:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:36,158 INFO L225 Difference]: With dead ends: 31 [2021-11-19 05:35:36,162 INFO L226 Difference]: Without dead ends: 14 [2021-11-19 05:35:36,166 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 05:35:36,182 INFO L933 BasicCegarLoop]: 21 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, 21 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 05:35:36,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:35:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-19 05:35:36,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-19 05:35:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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 05:35:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-19 05:35:36,244 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2021-11-19 05:35:36,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:36,245 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-19 05:35:36,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 05:35:36,246 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-19 05:35:36,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 05:35:36,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:36,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:36,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:35:36,248 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:36,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:36,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2021-11-19 05:35:36,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:36,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462303449] [2021-11-19 05:35:36,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:36,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:36,394 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 05:35:36,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:36,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462303449] [2021-11-19 05:35:36,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462303449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:36,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:36,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:35:36,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208107186] [2021-11-19 05:35:36,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:36,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:35:36,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:36,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:35:36,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:35:36,406 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 05:35:36,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:36,487 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-11-19 05:35:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:35:36,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-19 05:35:36,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:36,490 INFO L225 Difference]: With dead ends: 37 [2021-11-19 05:35:36,491 INFO L226 Difference]: Without dead ends: 25 [2021-11-19 05:35:36,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 05:35:36,500 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:36,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 14 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:35:36,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-19 05:35:36,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-11-19 05:35:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 05:35:36,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-19 05:35:36,519 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2021-11-19 05:35:36,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:36,521 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-19 05:35:36,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 05:35:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-19 05:35:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 05:35:36,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:36,527 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:36,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:35:36,529 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:36,535 INFO L85 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2021-11-19 05:35:36,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:36,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103019195] [2021-11-19 05:35:36,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:36,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:36,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:36,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103019195] [2021-11-19 05:35:36,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103019195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:35:36,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108690115] [2021-11-19 05:35:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:36,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:36,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:36,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:36,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:35:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:36,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:35:36,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:37,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:37,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108690115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:35:37,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:35:37,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-11-19 05:35:37,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797976460] [2021-11-19 05:35:37,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:37,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:35:37,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:37,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:35:37,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:35:37,153 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 05:35:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:37,348 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-11-19 05:35:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:35:37,349 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) Word has length 12 [2021-11-19 05:35:37,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:37,351 INFO L225 Difference]: With dead ends: 61 [2021-11-19 05:35:37,351 INFO L226 Difference]: Without dead ends: 49 [2021-11-19 05:35:37,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:35:37,353 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 104 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:37,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 32 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:35:37,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-19 05:35:37,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 24. [2021-11-19 05:35:37,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:35:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-19 05:35:37,362 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2021-11-19 05:35:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:37,362 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-19 05:35:37,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 05:35:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-19 05:35:37,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 05:35:37,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:37,364 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:37,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:37,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:37,581 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:37,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:37,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1361285581, now seen corresponding path program 1 times [2021-11-19 05:35:37,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:37,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291178573] [2021-11-19 05:35:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:37,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:37,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:35:37,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002226409] [2021-11-19 05:35:37,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:37,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:37,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:37,626 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:37,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:35:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:37,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:35:37,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:38,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:38,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:38,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291178573] [2021-11-19 05:35:38,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:35:38,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002226409] [2021-11-19 05:35:38,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002226409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:35:38,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:38,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-19 05:35:38,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394218176] [2021-11-19 05:35:38,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:38,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 05:35:38,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:38,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 05:35:38,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:35:38,177 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:35:38,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:38,489 INFO L93 Difference]: Finished difference Result 131 states and 157 transitions. [2021-11-19 05:35:38,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:35:38,490 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-19 05:35:38,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:38,494 INFO L225 Difference]: With dead ends: 131 [2021-11-19 05:35:38,494 INFO L226 Difference]: Without dead ends: 117 [2021-11-19 05:35:38,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:35:38,497 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 324 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:38,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 62 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:35:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-19 05:35:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 42. [2021-11-19 05:35:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 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 05:35:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-11-19 05:35:38,509 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 21 [2021-11-19 05:35:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:38,510 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-11-19 05:35:38,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:35:38,511 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-11-19 05:35:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 05:35:38,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:38,512 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:38,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:38,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:38,729 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:38,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:38,730 INFO L85 PathProgramCache]: Analyzing trace with hash 194524081, now seen corresponding path program 2 times [2021-11-19 05:35:38,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:38,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429769923] [2021-11-19 05:35:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:38,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:38,755 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:35:38,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050227661] [2021-11-19 05:35:38,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:35:38,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:38,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:38,760 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:38,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:35:38,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 05:35:38,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:35:38,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:35:38,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-19 05:35:39,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:35:39,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:39,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429769923] [2021-11-19 05:35:39,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:35:39,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050227661] [2021-11-19 05:35:39,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050227661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:39,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:39,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 05:35:39,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738151370] [2021-11-19 05:35:39,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:39,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:35:39,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:39,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:35:39,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:35:39,284 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:35:39,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:39,374 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-11-19 05:35:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 05:35:39,375 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-19 05:35:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:39,376 INFO L225 Difference]: With dead ends: 61 [2021-11-19 05:35:39,377 INFO L226 Difference]: Without dead ends: 59 [2021-11-19 05:35:39,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:35:39,378 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:39,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 28 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:35:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-19 05:35:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2021-11-19 05:35:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 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 05:35:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-11-19 05:35:39,389 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 39 [2021-11-19 05:35:39,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:39,390 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-11-19 05:35:39,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:35:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-11-19 05:35:39,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 05:35:39,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:39,392 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:39,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-19 05:35:39,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:39,617 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:39,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:39,618 INFO L85 PathProgramCache]: Analyzing trace with hash -838184220, now seen corresponding path program 1 times [2021-11-19 05:35:39,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:39,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940249375] [2021-11-19 05:35:39,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:39,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:39,640 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:35:39,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492459644] [2021-11-19 05:35:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:39,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:39,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:39,642 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:39,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:35:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:39,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 05:35:39,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 05:35:40,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 05:35:40,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:40,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940249375] [2021-11-19 05:35:40,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:35:40,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492459644] [2021-11-19 05:35:40,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492459644] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:35:40,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:40,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-19 05:35:40,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21533972] [2021-11-19 05:35:40,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:40,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 05:35:40,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:40,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 05:35:40,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-11-19 05:35:40,489 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:35:41,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:41,322 INFO L93 Difference]: Finished difference Result 547 states and 646 transitions. [2021-11-19 05:35:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 05:35:41,323 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-19 05:35:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:41,331 INFO L225 Difference]: With dead ends: 547 [2021-11-19 05:35:41,331 INFO L226 Difference]: Without dead ends: 512 [2021-11-19 05:35:41,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 05:35:41,335 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 983 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:41,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 134 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:35:41,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-19 05:35:41,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 90. [2021-11-19 05:35:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 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 05:35:41,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2021-11-19 05:35:41,374 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 45 [2021-11-19 05:35:41,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:41,375 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2021-11-19 05:35:41,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:35:41,375 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2021-11-19 05:35:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 05:35:41,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:41,379 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:41,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:41,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-19 05:35:41,605 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:41,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:41,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1895724964, now seen corresponding path program 2 times [2021-11-19 05:35:41,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:41,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781394107] [2021-11-19 05:35:41,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:41,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:41,637 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:35:41,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974814534] [2021-11-19 05:35:41,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:35:41,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:41,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:41,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:41,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 05:35:41,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:35:41,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:35:41,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 05:35:41,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 05:35:42,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 05:35:43,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:43,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781394107] [2021-11-19 05:35:43,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:35:43,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974814534] [2021-11-19 05:35:43,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974814534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:35:43,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:43,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-11-19 05:35:43,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355216392] [2021-11-19 05:35:43,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:43,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-19 05:35:43,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:43,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-19 05:35:43,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2021-11-19 05:35:43,946 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 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 05:35:46,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:46,663 INFO L93 Difference]: Finished difference Result 1135 states and 1342 transitions. [2021-11-19 05:35:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 05:35:46,664 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 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 81 [2021-11-19 05:35:46,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:46,672 INFO L225 Difference]: With dead ends: 1135 [2021-11-19 05:35:46,672 INFO L226 Difference]: Without dead ends: 1082 [2021-11-19 05:35:46,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2021-11-19 05:35:46,680 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1681 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:46,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1681 Valid, 278 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 05:35:46,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-11-19 05:35:46,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 162. [2021-11-19 05:35:46,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.173913043478261) internal successors, (189), 161 states have internal predecessors, (189), 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 05:35:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 189 transitions. [2021-11-19 05:35:46,731 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 189 transitions. Word has length 81 [2021-11-19 05:35:46,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:46,733 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 189 transitions. [2021-11-19 05:35:46,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 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 05:35:46,734 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 189 transitions. [2021-11-19 05:35:46,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 05:35:46,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:46,745 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:46,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:46,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:46,953 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:46,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash 694735140, now seen corresponding path program 3 times [2021-11-19 05:35:46,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:46,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663679005] [2021-11-19 05:35:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:46,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:47,043 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:35:47,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559610425] [2021-11-19 05:35:47,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:35:47,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:47,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:47,047 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:47,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 05:35:47,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 05:35:47,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:35:47,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:35:47,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3155 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-11-19 05:35:48,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3155 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-11-19 05:35:50,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:50,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663679005] [2021-11-19 05:35:50,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:35:50,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559610425] [2021-11-19 05:35:50,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559610425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:35:50,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:50,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-19 05:35:50,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198088147] [2021-11-19 05:35:50,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:50,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 05:35:50,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:50,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 05:35:50,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:35:50,852 INFO L87 Difference]: Start difference. First operand 162 states and 189 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:35:51,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:51,112 INFO L93 Difference]: Finished difference Result 193 states and 228 transitions. [2021-11-19 05:35:51,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:35:51,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-19 05:35:51,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:51,115 INFO L225 Difference]: With dead ends: 193 [2021-11-19 05:35:51,115 INFO L226 Difference]: Without dead ends: 191 [2021-11-19 05:35:51,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:35:51,117 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 163 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:51,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 42 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:35:51,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-19 05:35:51,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 186. [2021-11-19 05:35:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.172972972972973) internal successors, (217), 185 states have internal predecessors, (217), 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 05:35:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 217 transitions. [2021-11-19 05:35:51,144 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 217 transitions. Word has length 153 [2021-11-19 05:35:51,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:51,146 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 217 transitions. [2021-11-19 05:35:51,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:35:51,147 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 217 transitions. [2021-11-19 05:35:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-19 05:35:51,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:51,157 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:51,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:51,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 05:35:51,373 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:51,374 INFO L85 PathProgramCache]: Analyzing trace with hash -86837392, now seen corresponding path program 4 times [2021-11-19 05:35:51,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:51,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890755781] [2021-11-19 05:35:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:51,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:51,413 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:35:51,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536790329] [2021-11-19 05:35:51,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:35:51,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:51,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:51,415 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:51,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 05:35:51,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:35:51,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:35:51,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-19 05:35:51,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 3015 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:54,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:36:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 3015 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:36:04,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:36:04,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890755781] [2021-11-19 05:36:04,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:36:04,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536790329] [2021-11-19 05:36:04,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536790329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:36:04,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:36:04,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 109 [2021-11-19 05:36:04,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213778407] [2021-11-19 05:36:04,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:36:04,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-19 05:36:04,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:36:04,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-19 05:36:04,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4047, Invalid=7725, Unknown=0, NotChecked=0, Total=11772 [2021-11-19 05:36:04,587 INFO L87 Difference]: Start difference. First operand 186 states and 217 transitions. Second operand has 109 states, 109 states have (on average 3.220183486238532) internal successors, (351), 109 states have internal predecessors, (351), 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 05:39:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:39:41,002 INFO L93 Difference]: Finished difference Result 3803 states and 4720 transitions. [2021-11-19 05:39:41,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 580 states. [2021-11-19 05:39:41,004 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.220183486238532) internal successors, (351), 109 states have internal predecessors, (351), 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 177 [2021-11-19 05:39:41,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:39:41,031 INFO L225 Difference]: With dead ends: 3803 [2021-11-19 05:39:41,031 INFO L226 Difference]: Without dead ends: 3801 [2021-11-19 05:39:41,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 673 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216745 ImplicationChecksByTransitivity, 200.5s TimeCoverageRelationStatistics Valid=111374, Invalid=343576, Unknown=0, NotChecked=0, Total=454950 [2021-11-19 05:39:41,094 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1863 mSDsluCounter, 1855 mSDsCounter, 0 mSdLazyCounter, 6215 mSolverCounterSat, 1152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1863 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 7367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 6215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:39:41,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1863 Valid, 1972 Invalid, 7367 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1152 Valid, 6215 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2021-11-19 05:39:41,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-11-19 05:39:41,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 1966. [2021-11-19 05:39:41,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1965 states have (on average 1.1720101781170484) internal successors, (2303), 1965 states have internal predecessors, (2303), 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 05:39:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 2303 transitions. [2021-11-19 05:39:41,446 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 2303 transitions. Word has length 177 [2021-11-19 05:39:41,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:39:41,447 INFO L470 AbstractCegarLoop]: Abstraction has 1966 states and 2303 transitions. [2021-11-19 05:39:41,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.220183486238532) internal successors, (351), 109 states have internal predecessors, (351), 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 05:39:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 2303 transitions. [2021-11-19 05:39:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-19 05:39:41,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:39:41,451 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-19 05:39:41,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-19 05:39:41,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:39:41,677 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:39:41,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:39:41,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1990974601, now seen corresponding path program 5 times [2021-11-19 05:39:41,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:39:41,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82067459] [2021-11-19 05:39:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:39:41,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:39:41,738 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:39:41,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642996432] [2021-11-19 05:39:41,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:39:41,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:39:41,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:39:41,755 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:39:41,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 05:46:39,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-11-19 05:46:39,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:46:39,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-19 05:46:39,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:46:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3351 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-19 05:46:40,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:46:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3351 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-19 05:46:44,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:46:44,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82067459] [2021-11-19 05:46:44,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:46:44,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642996432] [2021-11-19 05:46:44,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642996432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:46:44,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:46:44,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2021-11-19 05:46:44,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976303362] [2021-11-19 05:46:44,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:46:44,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-19 05:46:44,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:46:44,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-19 05:46:44,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2021-11-19 05:46:44,662 INFO L87 Difference]: Start difference. First operand 1966 states and 2303 transitions. Second operand has 98 states, 98 states have (on average 2.9693877551020407) internal successors, (291), 97 states have internal predecessors, (291), 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 05:47:00,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:47:00,304 INFO L93 Difference]: Finished difference Result 42108 states and 49150 transitions. [2021-11-19 05:47:00,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-19 05:47:00,304 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.9693877551020407) internal successors, (291), 97 states have internal predecessors, (291), 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 195 [2021-11-19 05:47:00,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:47:00,492 INFO L225 Difference]: With dead ends: 42108 [2021-11-19 05:47:00,492 INFO L226 Difference]: Without dead ends: 40215 [2021-11-19 05:47:00,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2021-11-19 05:47:00,510 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 4603 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 868 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4603 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 868 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:47:00,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4603 Valid, 554 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [868 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 05:47:00,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40215 states. [2021-11-19 05:47:01,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40215 to 2110. [2021-11-19 05:47:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 2109 states have (on average 1.1716453295400664) internal successors, (2471), 2109 states have internal predecessors, (2471), 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 05:47:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 2471 transitions. [2021-11-19 05:47:01,183 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 2471 transitions. Word has length 195 [2021-11-19 05:47:01,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:47:01,183 INFO L470 AbstractCegarLoop]: Abstraction has 2110 states and 2471 transitions. [2021-11-19 05:47:01,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.9693877551020407) internal successors, (291), 97 states have internal predecessors, (291), 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 05:47:01,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 2471 transitions. [2021-11-19 05:47:01,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-11-19 05:47:01,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:47:01,190 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 47, 47, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-19 05:47:01,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 05:47:01,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 05:47:01,413 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:47:01,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:47:01,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1041829769, now seen corresponding path program 6 times [2021-11-19 05:47:01,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:47:01,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486833775] [2021-11-19 05:47:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:47:01,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:47:01,458 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:47:01,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826049164] [2021-11-19 05:47:01,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 05:47:01,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:47:01,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:47:01,473 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:47:01,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 05:47:02,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-19 05:47:02,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:47:02,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 05:47:02,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:47:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13407 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 13207 trivial. 0 not checked. [2021-11-19 05:47:03,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:47:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13407 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 13207 trivial. 0 not checked. [2021-11-19 05:47:15,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:47:15,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486833775] [2021-11-19 05:47:15,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:47:15,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826049164] [2021-11-19 05:47:15,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826049164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:47:15,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:47:15,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-19 05:47:15,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965135393] [2021-11-19 05:47:15,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:47:15,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 05:47:15,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:47:15,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 05:47:15,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:47:15,702 INFO L87 Difference]: Start difference. First operand 2110 states and 2471 transitions. Second operand has 25 states, 25 states have (on average 4.8) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:47:19,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:47:19,431 INFO L93 Difference]: Finished difference Result 11462 states and 13474 transitions. [2021-11-19 05:47:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 05:47:19,432 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-11-19 05:47:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:47:19,450 INFO L225 Difference]: With dead ends: 11462 [2021-11-19 05:47:19,450 INFO L226 Difference]: Without dead ends: 11460 [2021-11-19 05:47:19,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 652 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=783, Invalid=1287, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 05:47:19,455 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 339 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:47:19,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 98 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:47:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2021-11-19 05:47:20,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 5146. [2021-11-19 05:47:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5146 states, 5145 states have (on average 1.1687074829931974) internal successors, (6013), 5145 states have internal predecessors, (6013), 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 05:47:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5146 states to 5146 states and 6013 transitions. [2021-11-19 05:47:20,406 INFO L78 Accepts]: Start accepts. Automaton has 5146 states and 6013 transitions. Word has length 339 [2021-11-19 05:47:20,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:47:20,407 INFO L470 AbstractCegarLoop]: Abstraction has 5146 states and 6013 transitions. [2021-11-19 05:47:20,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:47:20,407 INFO L276 IsEmpty]: Start isEmpty. Operand 5146 states and 6013 transitions. [2021-11-19 05:47:20,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-11-19 05:47:20,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:47:20,416 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 47, 47, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2021-11-19 05:47:20,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-19 05:47:20,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:47:20,623 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:47:20,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:47:20,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1634858234, now seen corresponding path program 7 times [2021-11-19 05:47:20,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:47:20,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949575220] [2021-11-19 05:47:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:47:20,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:47:20,671 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:47:20,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311488621] [2021-11-19 05:47:20,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 05:47:20,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:47:20,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:47:20,673 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:47:20,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b3ed6d-8ba3-421f-9d64-acb341596115/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 05:47:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:47:20,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-19 05:47:20,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:47:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14309 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 1102 trivial. 0 not checked. [2021-11-19 05:47:25,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:48:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14309 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 1102 trivial. 0 not checked. [2021-11-19 05:48:25,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:48:25,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949575220] [2021-11-19 05:48:25,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:48:25,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311488621] [2021-11-19 05:48:25,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311488621] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:48:25,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:48:25,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2021-11-19 05:48:25,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363284642] [2021-11-19 05:48:25,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:48:25,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2021-11-19 05:48:25,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:48:25,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2021-11-19 05:48:25,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2021-11-19 05:48:25,357 INFO L87 Difference]: Start difference. First operand 5146 states and 6013 transitions. Second operand has 194 states, 194 states have (on average 2.984536082474227) internal successors, (579), 193 states have internal predecessors, (579), 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)