./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_5+soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_5+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa --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 c47cab6e9e67c4b3363cebe5303809f696c66d6509c3a11e62d36bdf941dfec0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:42:44,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:42:44,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:42:44,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:42:44,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:42:44,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:42:44,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:42:44,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:42:44,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:42:44,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:42:44,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:42:44,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:42:44,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:42:44,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:42:44,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:42:44,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:42:44,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:42:44,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:42:44,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:42:44,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:42:44,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:42:44,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:42:44,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:42:44,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:42:44,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:42:44,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:42:44,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:42:44,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:42:44,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:42:44,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:42:44,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:42:44,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:42:44,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:42:44,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:42:44,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:42:44,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:42:44,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:42:44,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:42:44,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:42:44,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:42:44,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:42:44,532 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:42:44,554 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:42:44,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:42:44,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:42:44,555 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:42:44,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:42:44,556 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:42:44,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:42:44,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:42:44,557 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:42:44,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:42:44,557 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:42:44,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:42:44,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:42:44,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:42:44,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:42:44,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:42:44,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:42:44,559 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:42:44,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:42:44,559 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:42:44,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:42:44,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:42:44,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:42:44,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:42:44,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:42:44,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:42:44,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:42:44,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:42:44,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:42:44,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:42:44,564 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:42:44,564 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:42:44,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:42:44,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:42:44,565 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_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c47cab6e9e67c4b3363cebe5303809f696c66d6509c3a11e62d36bdf941dfec0 [2021-12-06 19:42:44,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:42:44,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:42:44,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:42:44,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:42:44,771 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:42:44,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/square_5+soft_float_3a.c.cil.c [2021-12-06 19:42:44,822 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/data/d72818d80/5390dd5a644c48a3a6e46ca92c6f1567/FLAG8bf1b70b4 [2021-12-06 19:42:45,203 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:42:45,203 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/sv-benchmarks/c/combinations/square_5+soft_float_3a.c.cil.c [2021-12-06 19:42:45,210 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/data/d72818d80/5390dd5a644c48a3a6e46ca92c6f1567/FLAG8bf1b70b4 [2021-12-06 19:42:45,220 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/data/d72818d80/5390dd5a644c48a3a6e46ca92c6f1567 [2021-12-06 19:42:45,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:42:45,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:42:45,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:42:45,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:42:45,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:42:45,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4099852a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45, skipping insertion in model container [2021-12-06 19:42:45,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:42:45,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:42:45,386 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_220d9e83-df5f-4913-974b-0b7782201ef2/sv-benchmarks/c/combinations/square_5+soft_float_3a.c.cil.c[1998,2011] [2021-12-06 19:42:45,390 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_220d9e83-df5f-4913-974b-0b7782201ef2/sv-benchmarks/c/combinations/square_5+soft_float_3a.c.cil.c[2367,2380] [2021-12-06 19:42:45,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:42:45,421 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:42:45,432 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_220d9e83-df5f-4913-974b-0b7782201ef2/sv-benchmarks/c/combinations/square_5+soft_float_3a.c.cil.c[1998,2011] [2021-12-06 19:42:45,433 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_220d9e83-df5f-4913-974b-0b7782201ef2/sv-benchmarks/c/combinations/square_5+soft_float_3a.c.cil.c[2367,2380] [2021-12-06 19:42:45,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:42:45,461 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:42:45,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45 WrapperNode [2021-12-06 19:42:45,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:42:45,462 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:42:45,462 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:42:45,462 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:42:45,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,493 INFO L137 Inliner]: procedures = 27, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2021-12-06 19:42:45,493 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:42:45,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:42:45,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:42:45,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:42:45,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:42:45,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:42:45,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:42:45,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:42:45,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:42:45,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:45,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:42:45,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:42:45,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:42:45,580 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-06 19:42:45,580 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-06 19:42:45,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:42:45,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:42:45,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:42:45,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 19:42:45,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 19:42:45,633 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:42:45,634 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:42:45,832 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:42:45,838 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:42:45,839 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 19:42:45,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:42:45 BoogieIcfgContainer [2021-12-06 19:42:45,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:42:45,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:42:45,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:42:45,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:42:45,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:42:45" (1/3) ... [2021-12-06 19:42:45,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@789abb49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:42:45, skipping insertion in model container [2021-12-06 19:42:45,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (2/3) ... [2021-12-06 19:42:45,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@789abb49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:42:45, skipping insertion in model container [2021-12-06 19:42:45,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:42:45" (3/3) ... [2021-12-06 19:42:45,848 INFO L111 eAbstractionObserver]: Analyzing ICFG square_5+soft_float_3a.c.cil.c [2021-12-06 19:42:45,859 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:42:45,859 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 19:42:45,903 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:42:45,911 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 [2021-12-06 19:42:45,911 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 19:42:45,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 19:42:45,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:42:45,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:45,935 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:45,935 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:42:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:45,941 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-06 19:42:45,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:45,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846825718] [2021-12-06 19:42:45,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:45,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:42:46,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:46,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846825718] [2021-12-06 19:42:46,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846825718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:46,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:46,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:42:46,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042180991] [2021-12-06 19:42:46,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:46,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:42:46,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:46,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:42:46,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:42:46,095 INFO L87 Difference]: Start difference. First operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-06 19:42:46,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:46,116 INFO L93 Difference]: Finished difference Result 115 states and 173 transitions. [2021-12-06 19:42:46,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:42:46,118 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-12-06 19:42:46,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:46,124 INFO L225 Difference]: With dead ends: 115 [2021-12-06 19:42:46,124 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 19:42:46,127 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 [2021-12-06 19:42:46,130 INFO L933 BasicCegarLoop]: 81 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, 81 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 [2021-12-06 19:42:46,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:46,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 19:42:46,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-06 19:42:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 44 states have internal predecessors, (61), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:42:46,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-12-06 19:42:46,162 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 7 [2021-12-06 19:42:46,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:46,162 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-12-06 19:42:46,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-06 19:42:46,162 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-12-06 19:42:46,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:42:46,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:46,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:46,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:42:46,163 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:42:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-06 19:42:46,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:46,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127755939] [2021-12-06 19:42:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:46,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:42:46,178 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 19:42:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:42:46,198 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 19:42:46,198 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 19:42:46,199 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-06 19:42:46,200 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-06 19:42:46,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:42:46,203 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-06 19:42:46,205 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 19:42:46,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 07:42:46 BoogieIcfgContainer [2021-12-06 19:42:46,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 19:42:46,221 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 19:42:46,221 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 19:42:46,221 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 19:42:46,221 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:42:45" (3/4) ... [2021-12-06 19:42:46,224 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-06 19:42:46,224 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 19:42:46,224 INFO L158 Benchmark]: Toolchain (without parser) took 1000.48ms. Allocated memory was 79.7MB in the beginning and 107.0MB in the end (delta: 27.3MB). Free memory was 56.3MB in the beginning and 62.8MB in the end (delta: -6.5MB). Peak memory consumption was 20.6MB. Max. memory is 16.1GB. [2021-12-06 19:42:46,225 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 79.7MB. Free memory is still 53.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:42:46,226 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.89ms. Allocated memory was 79.7MB in the beginning and 107.0MB in the end (delta: 27.3MB). Free memory was 56.1MB in the beginning and 74.7MB in the end (delta: -18.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 19:42:46,226 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.23ms. Allocated memory is still 107.0MB. Free memory was 74.7MB in the beginning and 72.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:42:46,226 INFO L158 Benchmark]: Boogie Preprocessor took 22.60ms. Allocated memory is still 107.0MB. Free memory was 72.7MB in the beginning and 71.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:42:46,227 INFO L158 Benchmark]: RCFGBuilder took 323.49ms. Allocated memory is still 107.0MB. Free memory was 71.3MB in the beginning and 57.6MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-06 19:42:46,227 INFO L158 Benchmark]: TraceAbstraction took 377.88ms. Allocated memory is still 107.0MB. Free memory was 57.1MB in the beginning and 63.3MB in the end (delta: -6.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:42:46,228 INFO L158 Benchmark]: Witness Printer took 3.16ms. Allocated memory is still 107.0MB. Free memory was 63.3MB in the beginning and 62.8MB in the end (delta: 551.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:42:46,230 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 79.7MB. Free memory is still 53.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 236.89ms. Allocated memory was 79.7MB in the beginning and 107.0MB in the end (delta: 27.3MB). Free memory was 56.1MB in the beginning and 74.7MB in the end (delta: -18.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.23ms. Allocated memory is still 107.0MB. Free memory was 74.7MB in the beginning and 72.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.60ms. Allocated memory is still 107.0MB. Free memory was 72.7MB in the beginning and 71.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 323.49ms. Allocated memory is still 107.0MB. Free memory was 71.3MB in the beginning and 57.6MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 377.88ms. Allocated memory is still 107.0MB. Free memory was 57.1MB in the beginning and 63.3MB in the end (delta: -6.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.16ms. Allocated memory is still 107.0MB. Free memory was 63.3MB in the beginning and 62.8MB in the end (delta: 551.7kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L320] COND TRUE __VERIFIER_nondet_int() [L321] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.3985f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 60]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 60 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 81 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 81 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-06 19:42:46,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_5+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa --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 c47cab6e9e67c4b3363cebe5303809f696c66d6509c3a11e62d36bdf941dfec0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:42:47,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:42:47,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:42:47,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:42:47,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:42:47,897 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:42:47,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:42:47,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:42:47,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:42:47,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:42:47,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:42:47,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:42:47,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:42:47,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:42:47,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:42:47,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:42:47,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:42:47,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:42:47,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:42:47,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:42:47,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:42:47,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:42:47,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:42:47,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:42:47,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:42:47,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:42:47,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:42:47,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:42:47,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:42:47,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:42:47,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:42:47,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:42:47,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:42:47,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:42:47,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:42:47,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:42:47,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:42:47,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:42:47,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:42:47,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:42:47,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:42:47,947 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-06 19:42:47,967 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:42:47,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:42:47,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:42:47,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:42:47,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:42:47,968 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:42:47,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:42:47,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:42:47,969 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:42:47,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:42:47,969 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:42:47,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:42:47,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:42:47,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:42:47,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:42:47,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:42:47,970 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 19:42:47,970 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 19:42:47,970 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 19:42:47,970 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:42:47,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:42:47,971 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:42:47,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:42:47,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:42:47,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:42:47,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:42:47,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:42:47,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:42:47,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:42:47,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:42:47,972 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 19:42:47,972 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 19:42:47,972 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:42:47,972 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:42:47,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:42:47,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:42:47,973 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 19:42:47,973 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c47cab6e9e67c4b3363cebe5303809f696c66d6509c3a11e62d36bdf941dfec0 [2021-12-06 19:42:48,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:42:48,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:42:48,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:42:48,233 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:42:48,234 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:42:48,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/square_5+soft_float_3a.c.cil.c [2021-12-06 19:42:48,278 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/data/e883ac780/4191972c60af41a88baadb3b87609a67/FLAG12572d512 [2021-12-06 19:42:48,686 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:42:48,686 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/sv-benchmarks/c/combinations/square_5+soft_float_3a.c.cil.c [2021-12-06 19:42:48,695 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/data/e883ac780/4191972c60af41a88baadb3b87609a67/FLAG12572d512 [2021-12-06 19:42:48,705 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/data/e883ac780/4191972c60af41a88baadb3b87609a67 [2021-12-06 19:42:48,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:42:48,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:42:48,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:42:48,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:42:48,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:42:48,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:42:48" (1/1) ... [2021-12-06 19:42:48,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2885e8f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:48, skipping insertion in model container [2021-12-06 19:42:48,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:42:48" (1/1) ... [2021-12-06 19:42:48,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:42:48,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:42:48,865 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_220d9e83-df5f-4913-974b-0b7782201ef2/sv-benchmarks/c/combinations/square_5+soft_float_3a.c.cil.c[1998,2011] [2021-12-06 19:42:48,869 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_220d9e83-df5f-4913-974b-0b7782201ef2/sv-benchmarks/c/combinations/square_5+soft_float_3a.c.cil.c[2367,2380] [2021-12-06 19:42:48,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:42:48,916 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:42:48,930 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_220d9e83-df5f-4913-974b-0b7782201ef2/sv-benchmarks/c/combinations/square_5+soft_float_3a.c.cil.c[1998,2011] [2021-12-06 19:42:48,931 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_220d9e83-df5f-4913-974b-0b7782201ef2/sv-benchmarks/c/combinations/square_5+soft_float_3a.c.cil.c[2367,2380] [2021-12-06 19:42:48,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:42:48,963 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:42:48,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:48 WrapperNode [2021-12-06 19:42:48,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:42:48,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:42:48,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:42:48,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:42:48,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:48" (1/1) ... [2021-12-06 19:42:48,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:48" (1/1) ... [2021-12-06 19:42:48,996 INFO L137 Inliner]: procedures = 28, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 129 [2021-12-06 19:42:48,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:42:48,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:42:48,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:42:48,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:42:49,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:48" (1/1) ... [2021-12-06 19:42:49,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:48" (1/1) ... [2021-12-06 19:42:49,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:48" (1/1) ... [2021-12-06 19:42:49,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:48" (1/1) ... [2021-12-06 19:42:49,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:48" (1/1) ... [2021-12-06 19:42:49,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:48" (1/1) ... [2021-12-06 19:42:49,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:48" (1/1) ... [2021-12-06 19:42:49,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:42:49,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:42:49,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:42:49,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:42:49,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:48" (1/1) ... [2021-12-06 19:42:49,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:42:49,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:49,047 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:42:49,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:42:49,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:42:49,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 19:42:49,085 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-06 19:42:49,085 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-06 19:42:49,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:42:49,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:42:49,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 19:42:49,085 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 19:42:49,162 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:42:49,164 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:42:51,567 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:42:51,576 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:42:51,576 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 19:42:51,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:42:51 BoogieIcfgContainer [2021-12-06 19:42:51,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:42:51,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:42:51,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:42:51,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:42:51,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:42:48" (1/3) ... [2021-12-06 19:42:51,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a714730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:42:51, skipping insertion in model container [2021-12-06 19:42:51,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:48" (2/3) ... [2021-12-06 19:42:51,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a714730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:42:51, skipping insertion in model container [2021-12-06 19:42:51,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:42:51" (3/3) ... [2021-12-06 19:42:51,586 INFO L111 eAbstractionObserver]: Analyzing ICFG square_5+soft_float_3a.c.cil.c [2021-12-06 19:42:51,591 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:42:51,592 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 19:42:51,629 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:42:51,634 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 [2021-12-06 19:42:51,634 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 19:42:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 19:42:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:42:51,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:51,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:51,652 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:42:51,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:51,656 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-06 19:42:51,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:42:51,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874123779] [2021-12-06 19:42:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:51,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:42:51,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:42:51,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:42:51,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 19:42:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:52,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 19:42:52,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:42:52,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:42:52,156 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:42:52,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874123779] [2021-12-06 19:42:52,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874123779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:52,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:52,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:42:52,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137121538] [2021-12-06 19:42:52,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:52,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:42:52,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:42:52,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:42:52,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:42:52,192 INFO L87 Difference]: Start difference. First operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-06 19:42:52,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:52,212 INFO L93 Difference]: Finished difference Result 115 states and 173 transitions. [2021-12-06 19:42:52,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:42:52,213 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-12-06 19:42:52,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:52,219 INFO L225 Difference]: With dead ends: 115 [2021-12-06 19:42:52,219 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 19:42:52,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:42:52,229 INFO L933 BasicCegarLoop]: 81 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, 81 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 [2021-12-06 19:42:52,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:52,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 19:42:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-06 19:42:52,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 44 states have internal predecessors, (61), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:42:52,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-12-06 19:42:52,265 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 7 [2021-12-06 19:42:52,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:52,266 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-12-06 19:42:52,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-06 19:42:52,266 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-12-06 19:42:52,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:42:52,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:52,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:52,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:42:52,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:42:52,468 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:42:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:52,469 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-06 19:42:52,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:42:52,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136586349] [2021-12-06 19:42:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:52,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:42:52,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:42:52,471 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:42:52,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 19:54:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:05,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:54:05,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:54:19,918 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-12-06 19:55:08,624 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 2797.0 2000.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from false [2021-12-06 19:55:10,671 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 2797.0 2000.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from true [2021-12-06 19:55:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:55:10,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:55:10,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:55:10,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136586349] [2021-12-06 19:55:10,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136586349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:55:10,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:55:10,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:55:10,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84498713] [2021-12-06 19:55:10,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:55:10,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:55:10,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:55:10,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:55:10,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2021-12-06 19:55:10,675 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2021-12-06 19:55:13,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 19:55:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:13,175 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2021-12-06 19:55:13,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:55:13,176 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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 7 [2021-12-06 19:55:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:13,177 INFO L225 Difference]: With dead ends: 51 [2021-12-06 19:55:13,177 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 19:55:13,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2021-12-06 19:55:13,179 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 65 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:13,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 175 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 1 Unknown, 135 Unchecked, 2.4s Time] [2021-12-06 19:55:13,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 19:55:13,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-06 19:55:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:55:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 65 transitions. [2021-12-06 19:55:13,187 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 65 transitions. Word has length 7 [2021-12-06 19:55:13,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:13,187 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 65 transitions. [2021-12-06 19:55:13,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2021-12-06 19:55:13,188 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 65 transitions. [2021-12-06 19:55:13,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 19:55:13,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:13,190 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:13,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 19:55:13,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:55:13,392 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:13,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:13,394 INFO L85 PathProgramCache]: Analyzing trace with hash 220430878, now seen corresponding path program 1 times [2021-12-06 19:55:13,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:55:13,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824328476] [2021-12-06 19:55:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:13,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:55:13,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:55:13,398 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:55:13,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 19:55:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:13,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:55:13,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:55:13,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:55:13,636 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:55:13,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824328476] [2021-12-06 19:55:13,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824328476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:55:13,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:55:13,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:55:13,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977729775] [2021-12-06 19:55:13,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:55:13,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:55:13,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:55:13,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:55:13,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:55:13,638 INFO L87 Difference]: Start difference. First operand 46 states and 65 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:55:13,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:13,854 INFO L93 Difference]: Finished difference Result 102 states and 148 transitions. [2021-12-06 19:55:13,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:55:13,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2021-12-06 19:55:13,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:13,858 INFO L225 Difference]: With dead ends: 102 [2021-12-06 19:55:13,858 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 19:55:13,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:55:13,860 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:13,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 143 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:55:13,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 19:55:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2021-12-06 19:55:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 19:55:13,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2021-12-06 19:55:13,870 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 42 [2021-12-06 19:55:13,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:13,871 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2021-12-06 19:55:13,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:55:13,871 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2021-12-06 19:55:13,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 19:55:13,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:13,872 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:13,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 19:55:14,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:55:14,075 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:14,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:14,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1744233432, now seen corresponding path program 1 times [2021-12-06 19:55:14,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:55:14,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473748414] [2021-12-06 19:55:14,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:14,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:55:14,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:55:14,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:55:14,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 19:55:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:14,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:55:14,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:55:14,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:55:14,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:55:14,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473748414] [2021-12-06 19:55:14,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473748414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:55:14,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:55:14,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:55:14,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530544373] [2021-12-06 19:55:14,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:55:14,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:55:14,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:55:14,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:55:14,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:55:14,350 INFO L87 Difference]: Start difference. First operand 51 states and 71 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:55:14,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:14,553 INFO L93 Difference]: Finished difference Result 106 states and 151 transitions. [2021-12-06 19:55:14,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:55:14,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2021-12-06 19:55:14,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:14,556 INFO L225 Difference]: With dead ends: 106 [2021-12-06 19:55:14,556 INFO L226 Difference]: Without dead ends: 63 [2021-12-06 19:55:14,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:55:14,558 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:14,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:55:14,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-06 19:55:14,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-12-06 19:55:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 19:55:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2021-12-06 19:55:14,568 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 45 [2021-12-06 19:55:14,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:14,568 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2021-12-06 19:55:14,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:55:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2021-12-06 19:55:14,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 19:55:14,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:14,570 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:14,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 19:55:14,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:55:14,772 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:14,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:14,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1089123319, now seen corresponding path program 1 times [2021-12-06 19:55:14,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:55:14,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993255824] [2021-12-06 19:55:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:14,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:55:14,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:55:14,778 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:55:14,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 19:55:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:14,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:55:14,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:55:15,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:55:15,028 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:55:15,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993255824] [2021-12-06 19:55:15,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993255824] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:55:15,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:55:15,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:55:15,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430573919] [2021-12-06 19:55:15,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:55:15,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:55:15,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:55:15,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:55:15,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:55:15,030 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:55:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:15,300 INFO L93 Difference]: Finished difference Result 115 states and 163 transitions. [2021-12-06 19:55:15,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:55:15,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2021-12-06 19:55:15,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:15,303 INFO L225 Difference]: With dead ends: 115 [2021-12-06 19:55:15,303 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 19:55:15,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:55:15,305 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:15,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 150 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:55:15,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 19:55:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2021-12-06 19:55:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.375) internal successors, (66), 49 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 19:55:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2021-12-06 19:55:15,316 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 46 [2021-12-06 19:55:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:15,317 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2021-12-06 19:55:15,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:55:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2021-12-06 19:55:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 19:55:15,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:15,319 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:15,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-06 19:55:15,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:55:15,521 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:15,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:15,522 INFO L85 PathProgramCache]: Analyzing trace with hash 957340839, now seen corresponding path program 1 times [2021-12-06 19:55:15,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:55:15,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958117075] [2021-12-06 19:55:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:15,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:55:15,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:55:15,526 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:55:15,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 19:55:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:15,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:55:15,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:55:15,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:55:15,815 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:55:15,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958117075] [2021-12-06 19:55:15,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958117075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:55:15,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:55:15,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:55:15,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221944647] [2021-12-06 19:55:15,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:55:15,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:55:15,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:55:15,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:55:15,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:55:15,817 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:55:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:16,210 INFO L93 Difference]: Finished difference Result 123 states and 174 transitions. [2021-12-06 19:55:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:55:16,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2021-12-06 19:55:16,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:16,213 INFO L225 Difference]: With dead ends: 123 [2021-12-06 19:55:16,213 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 19:55:16,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:55:16,215 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 19 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:16,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 198 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:55:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 19:55:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2021-12-06 19:55:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 50 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 19:55:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 81 transitions. [2021-12-06 19:55:16,225 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 81 transitions. Word has length 47 [2021-12-06 19:55:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:16,226 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 81 transitions. [2021-12-06 19:55:16,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:55:16,226 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 81 transitions. [2021-12-06 19:55:16,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 19:55:16,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:16,228 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:16,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 19:55:16,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:55:16,429 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:16,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:16,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1066513524, now seen corresponding path program 1 times [2021-12-06 19:55:16,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:55:16,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429486143] [2021-12-06 19:55:16,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:16,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:55:16,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:55:16,431 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:55:16,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 19:55:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:16,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:55:16,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:55:16,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:55:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:55:17,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:55:17,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429486143] [2021-12-06 19:55:17,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429486143] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:55:17,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:55:17,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 19:55:17,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600456425] [2021-12-06 19:55:17,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:55:17,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:55:17,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:55:17,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:55:17,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:55:17,245 INFO L87 Difference]: Start difference. First operand 58 states and 81 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:55:17,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:17,916 INFO L93 Difference]: Finished difference Result 144 states and 206 transitions. [2021-12-06 19:55:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:55:17,917 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-12-06 19:55:17,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:17,919 INFO L225 Difference]: With dead ends: 144 [2021-12-06 19:55:17,919 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 19:55:17,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:55:17,920 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 52 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:17,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 285 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:55:17,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 19:55:17,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 66. [2021-12-06 19:55:17,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 58 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 19:55:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 94 transitions. [2021-12-06 19:55:17,931 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 94 transitions. Word has length 48 [2021-12-06 19:55:17,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:17,931 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 94 transitions. [2021-12-06 19:55:17,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:55:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 94 transitions. [2021-12-06 19:55:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 19:55:17,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:17,933 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:17,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 19:55:18,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:55:18,135 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:18,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:18,136 INFO L85 PathProgramCache]: Analyzing trace with hash -588856565, now seen corresponding path program 1 times [2021-12-06 19:55:18,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:55:18,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751075902] [2021-12-06 19:55:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:18,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:55:18,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:55:18,140 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:55:18,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 19:55:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:18,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:55:18,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:55:18,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:55:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:55:19,061 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:55:19,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751075902] [2021-12-06 19:55:19,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751075902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:55:19,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:55:19,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-06 19:55:19,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830134386] [2021-12-06 19:55:19,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:55:19,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:55:19,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:55:19,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:55:19,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:55:19,063 INFO L87 Difference]: Start difference. First operand 66 states and 94 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:55:19,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:19,909 INFO L93 Difference]: Finished difference Result 162 states and 234 transitions. [2021-12-06 19:55:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:55:19,910 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2021-12-06 19:55:19,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:19,911 INFO L225 Difference]: With dead ends: 162 [2021-12-06 19:55:19,912 INFO L226 Difference]: Without dead ends: 104 [2021-12-06 19:55:19,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:55:19,913 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 138 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:19,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 250 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:55:19,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-06 19:55:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 70. [2021-12-06 19:55:19,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 62 states have internal predecessors, (88), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 19:55:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 101 transitions. [2021-12-06 19:55:19,925 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 101 transitions. Word has length 50 [2021-12-06 19:55:19,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:19,925 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 101 transitions. [2021-12-06 19:55:19,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:55:19,925 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 101 transitions. [2021-12-06 19:55:19,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 19:55:19,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:19,926 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:19,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 19:55:20,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:55:20,128 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:20,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:20,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1889085224, now seen corresponding path program 2 times [2021-12-06 19:55:20,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:55:20,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377646309] [2021-12-06 19:55:20,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:55:20,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:55:20,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:55:20,134 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:55:20,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 19:55:20,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:55:20,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:55:20,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:55:20,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-06 19:55:20,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:55:20,391 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:55:20,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377646309] [2021-12-06 19:55:20,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377646309] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:55:20,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:55:20,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:55:20,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244128128] [2021-12-06 19:55:20,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:55:20,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:55:20,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:55:20,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:55:20,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:55:20,393 INFO L87 Difference]: Start difference. First operand 70 states and 101 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 19:55:20,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:20,539 INFO L93 Difference]: Finished difference Result 110 states and 159 transitions. [2021-12-06 19:55:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:55:20,540 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2021-12-06 19:55:20,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:20,541 INFO L225 Difference]: With dead ends: 110 [2021-12-06 19:55:20,541 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 19:55:20,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:55:20,542 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 17 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:20,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 297 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:55:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 19:55:20,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-12-06 19:55:20,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 70 states have internal predecessors, (95), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 19:55:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 113 transitions. [2021-12-06 19:55:20,555 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 113 transitions. Word has length 57 [2021-12-06 19:55:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:20,555 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 113 transitions. [2021-12-06 19:55:20,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 19:55:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 113 transitions. [2021-12-06 19:55:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 19:55:20,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:20,557 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:20,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 19:55:20,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:55:20,758 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:20,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:20,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1704817494, now seen corresponding path program 1 times [2021-12-06 19:55:20,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:55:20,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083113204] [2021-12-06 19:55:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:20,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:55:20,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:55:20,764 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:55:20,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 19:55:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:20,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:55:20,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:55:21,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:55:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:55:22,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:55:22,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083113204] [2021-12-06 19:55:22,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083113204] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:55:22,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:55:22,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-06 19:55:22,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971832514] [2021-12-06 19:55:22,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:55:22,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 19:55:22,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:55:22,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 19:55:22,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:55:22,375 INFO L87 Difference]: Start difference. First operand 79 states and 113 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:55:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:24,817 INFO L93 Difference]: Finished difference Result 221 states and 318 transitions. [2021-12-06 19:55:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 19:55:24,818 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 57 [2021-12-06 19:55:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:24,820 INFO L225 Difference]: With dead ends: 221 [2021-12-06 19:55:24,820 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 19:55:24,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:55:24,822 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 178 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:24,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 505 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 19:55:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 19:55:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 93. [2021-12-06 19:55:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 82 states have (on average 1.4390243902439024) internal successors, (118), 84 states have internal predecessors, (118), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 19:55:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 136 transitions. [2021-12-06 19:55:24,838 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 136 transitions. Word has length 57 [2021-12-06 19:55:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:24,838 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 136 transitions. [2021-12-06 19:55:24,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:55:24,838 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 136 transitions. [2021-12-06 19:55:24,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 19:55:24,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:24,839 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:24,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 19:55:25,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:55:25,041 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:25,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:25,042 INFO L85 PathProgramCache]: Analyzing trace with hash -848364147, now seen corresponding path program 1 times [2021-12-06 19:55:25,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:55:25,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057373459] [2021-12-06 19:55:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:25,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:55:25,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:55:25,046 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:55:25,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 19:55:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:25,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:55:25,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:55:25,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:55:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:55:27,228 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:55:27,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057373459] [2021-12-06 19:55:27,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057373459] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:55:27,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:55:27,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-06 19:55:27,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787295202] [2021-12-06 19:55:27,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:55:27,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:55:27,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:55:27,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:55:27,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:55:27,230 INFO L87 Difference]: Start difference. First operand 93 states and 136 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:55:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:30,599 INFO L93 Difference]: Finished difference Result 244 states and 356 transitions. [2021-12-06 19:55:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 19:55:30,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 62 [2021-12-06 19:55:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:30,602 INFO L225 Difference]: With dead ends: 244 [2021-12-06 19:55:30,602 INFO L226 Difference]: Without dead ends: 159 [2021-12-06 19:55:30,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=354, Invalid=638, Unknown=0, NotChecked=0, Total=992 [2021-12-06 19:55:30,604 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 321 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:30,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 786 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 19:55:30,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-06 19:55:30,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 103. [2021-12-06 19:55:30,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 94 states have internal predecessors, (135), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 19:55:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 153 transitions. [2021-12-06 19:55:30,624 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 153 transitions. Word has length 62 [2021-12-06 19:55:30,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:30,624 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 153 transitions. [2021-12-06 19:55:30,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:55:30,625 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 153 transitions. [2021-12-06 19:55:30,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 19:55:30,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:30,626 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:30,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 19:55:30,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:55:30,827 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:30,828 INFO L85 PathProgramCache]: Analyzing trace with hash -115561174, now seen corresponding path program 2 times [2021-12-06 19:55:30,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:55:30,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432397938] [2021-12-06 19:55:30,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:55:30,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:55:30,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:55:30,832 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:55:30,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 19:55:30,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:55:30,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:55:30,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:55:30,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-06 19:55:30,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:55:30,986 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:55:30,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432397938] [2021-12-06 19:55:30,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432397938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:55:30,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:55:30,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:55:30,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054746551] [2021-12-06 19:55:30,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:55:30,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:55:30,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:55:30,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:55:30,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:55:30,987 INFO L87 Difference]: Start difference. First operand 103 states and 153 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 19:55:31,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:31,005 INFO L93 Difference]: Finished difference Result 112 states and 163 transitions. [2021-12-06 19:55:31,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:55:31,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 75 [2021-12-06 19:55:31,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:31,007 INFO L225 Difference]: With dead ends: 112 [2021-12-06 19:55:31,008 INFO L226 Difference]: Without dead ends: 103 [2021-12-06 19:55:31,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:55:31,008 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:31,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:55:31,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-06 19:55:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-12-06 19:55:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 92 states have (on average 1.4565217391304348) internal successors, (134), 94 states have internal predecessors, (134), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 19:55:31,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 152 transitions. [2021-12-06 19:55:31,020 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 152 transitions. Word has length 75 [2021-12-06 19:55:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:31,020 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 152 transitions. [2021-12-06 19:55:31,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 19:55:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 152 transitions. [2021-12-06 19:55:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 19:55:31,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:31,022 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:31,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-06 19:55:31,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:55:31,223 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:31,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1364778096, now seen corresponding path program 1 times [2021-12-06 19:55:31,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:55:31,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475429095] [2021-12-06 19:55:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:31,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:55:31,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:55:31,228 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:55:31,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 19:55:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:31,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 19:55:31,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:55:32,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:55:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:55:35,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:55:35,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475429095] [2021-12-06 19:55:35,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475429095] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:55:35,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:55:35,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-06 19:55:35,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115256164] [2021-12-06 19:55:35,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:55:35,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:55:35,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:55:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:55:35,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:55:35,339 INFO L87 Difference]: Start difference. First operand 103 states and 152 transitions. Second operand has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 26 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:55:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:45,074 INFO L93 Difference]: Finished difference Result 347 states and 504 transitions. [2021-12-06 19:55:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 19:55:45,075 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 26 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 77 [2021-12-06 19:55:45,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:45,077 INFO L225 Difference]: With dead ends: 347 [2021-12-06 19:55:45,078 INFO L226 Difference]: Without dead ends: 252 [2021-12-06 19:55:45,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=729, Invalid=1433, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 19:55:45,080 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 642 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:45,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 1561 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-06 19:55:45,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-06 19:55:45,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 129. [2021-12-06 19:55:45,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 118 states have (on average 1.5) internal successors, (177), 120 states have internal predecessors, (177), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 19:55:45,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 195 transitions. [2021-12-06 19:55:45,098 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 195 transitions. Word has length 77 [2021-12-06 19:55:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:45,098 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 195 transitions. [2021-12-06 19:55:45,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 26 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:55:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 195 transitions. [2021-12-06 19:55:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 19:55:45,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:45,099 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:45,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-06 19:55:45,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:55:45,300 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:45,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:45,302 INFO L85 PathProgramCache]: Analyzing trace with hash 875383315, now seen corresponding path program 1 times [2021-12-06 19:55:45,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:55:45,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334430986] [2021-12-06 19:55:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:45,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:55:45,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:55:45,306 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:55:45,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 19:55:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:45,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 19:55:45,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:55:47,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:55:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:55:50,937 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:55:50,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334430986] [2021-12-06 19:55:50,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334430986] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:55:50,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:55:50,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-12-06 19:55:50,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320262070] [2021-12-06 19:55:50,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:55:50,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 19:55:50,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:55:50,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 19:55:50,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:55:50,940 INFO L87 Difference]: Start difference. First operand 129 states and 195 transitions. Second operand has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:55:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:59,650 INFO L93 Difference]: Finished difference Result 348 states and 510 transitions. [2021-12-06 19:55:59,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 19:55:59,651 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2021-12-06 19:55:59,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:59,653 INFO L225 Difference]: With dead ends: 348 [2021-12-06 19:55:59,653 INFO L226 Difference]: Without dead ends: 227 [2021-12-06 19:55:59,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=991, Invalid=2315, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 19:55:59,655 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 777 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:59,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 1660 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-06 19:55:59,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-06 19:55:59,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 133. [2021-12-06 19:55:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 1.5081967213114753) internal successors, (184), 124 states have internal predecessors, (184), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 19:55:59,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 202 transitions. [2021-12-06 19:55:59,669 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 202 transitions. Word has length 88 [2021-12-06 19:55:59,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:59,670 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 202 transitions. [2021-12-06 19:55:59,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:55:59,670 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 202 transitions. [2021-12-06 19:55:59,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 19:55:59,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:59,671 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:59,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 19:55:59,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:55:59,871 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:59,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:59,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1663337104, now seen corresponding path program 2 times [2021-12-06 19:55:59,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:55:59,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184249871] [2021-12-06 19:55:59,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:55:59,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:55:59,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:55:59,873 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:55:59,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 19:55:59,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:55:59,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:55:59,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:55:59,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-12-06 19:56:00,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:56:00,058 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:56:00,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184249871] [2021-12-06 19:56:00,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184249871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:56:00,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:56:00,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:56:00,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192666630] [2021-12-06 19:56:00,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:56:00,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:56:00,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:56:00,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:56:00,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:56:00,061 INFO L87 Difference]: Start difference. First operand 133 states and 202 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 19:56:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:56:00,195 INFO L93 Difference]: Finished difference Result 170 states and 252 transitions. [2021-12-06 19:56:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:56:00,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 113 [2021-12-06 19:56:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:56:00,198 INFO L225 Difference]: With dead ends: 170 [2021-12-06 19:56:00,198 INFO L226 Difference]: Without dead ends: 160 [2021-12-06 19:56:00,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:56:00,199 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 44 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:56:00,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 202 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:56:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-06 19:56:00,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 138. [2021-12-06 19:56:00,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 127 states have (on average 1.4960629921259843) internal successors, (190), 129 states have internal predecessors, (190), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 19:56:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 208 transitions. [2021-12-06 19:56:00,217 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 208 transitions. Word has length 113 [2021-12-06 19:56:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:56:00,217 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 208 transitions. [2021-12-06 19:56:00,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 19:56:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 208 transitions. [2021-12-06 19:56:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 19:56:00,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:56:00,219 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:00,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 19:56:00,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:56:00,419 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:56:00,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:00,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1822283566, now seen corresponding path program 1 times [2021-12-06 19:56:00,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:56:00,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519013981] [2021-12-06 19:56:00,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:00,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:56:00,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:56:00,421 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:56:00,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 19:56:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:00,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 19:56:00,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 24 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:56:04,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:56:13,088 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:56:13,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519013981] [2021-12-06 19:56:13,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519013981] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:13,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:56:13,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-06 19:56:13,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675087346] [2021-12-06 19:56:13,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:13,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 19:56:13,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:56:13,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 19:56:13,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 19:56:13,091 INFO L87 Difference]: Start difference. First operand 138 states and 208 transitions. Second operand has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:56:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:56:54,259 INFO L93 Difference]: Finished difference Result 591 states and 868 transitions. [2021-12-06 19:56:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-06 19:56:54,261 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 113 [2021-12-06 19:56:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:56:54,265 INFO L225 Difference]: With dead ends: 591 [2021-12-06 19:56:54,265 INFO L226 Difference]: Without dead ends: 461 [2021-12-06 19:56:54,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=2901, Invalid=6029, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 19:56:54,269 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 2260 mSDsluCounter, 4808 mSDsCounter, 0 mSdLazyCounter, 4147 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2260 SdHoareTripleChecker+Valid, 5017 SdHoareTripleChecker+Invalid, 4492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 4147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:56:54,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2260 Valid, 5017 Invalid, 4492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 4147 Invalid, 0 Unknown, 0 Unchecked, 19.9s Time] [2021-12-06 19:56:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-12-06 19:56:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 206. [2021-12-06 19:56:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 195 states have (on average 1.5538461538461539) internal successors, (303), 197 states have internal predecessors, (303), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 19:56:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 321 transitions. [2021-12-06 19:56:54,297 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 321 transitions. Word has length 113 [2021-12-06 19:56:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:56:54,297 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 321 transitions. [2021-12-06 19:56:54,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:56:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 321 transitions. [2021-12-06 19:56:54,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 19:56:54,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:56:54,299 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:54,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 19:56:54,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:56:54,500 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:56:54,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:54,500 INFO L85 PathProgramCache]: Analyzing trace with hash 239945809, now seen corresponding path program 1 times [2021-12-06 19:56:54,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:56:54,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507261582] [2021-12-06 19:56:54,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:54,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:56:54,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:56:54,501 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:56:54,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220d9e83-df5f-4913-974b-0b7782201ef2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 19:56:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:54,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 19:56:54,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 10 proven. 836 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 19:57:02,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:57:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 10 proven. 836 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 19:57:18,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:57:18,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507261582] [2021-12-06 19:57:18,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507261582] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:57:18,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:57:18,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 66 [2021-12-06 19:57:18,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936463599] [2021-12-06 19:57:18,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:57:18,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-06 19:57:18,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:57:18,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-06 19:57:18,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=766, Invalid=3524, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 19:57:18,097 INFO L87 Difference]: Start difference. First operand 206 states and 321 transitions. Second operand has 66 states, 66 states have (on average 2.878787878787879) internal successors, (190), 62 states have internal predecessors, (190), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7)