./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.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_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/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_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/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_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/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 ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:42:14,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:42:14,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:42:14,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:42:14,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:42:14,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:42:14,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:42:14,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:42:14,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:42:14,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:42:14,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:42:14,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:42:14,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:42:14,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:42:14,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:42:14,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:42:14,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:42:14,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:42:14,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:42:14,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:42:14,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:42:14,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:42:14,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:42:14,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:42:14,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:42:14,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:42:14,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:42:14,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:42:14,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:42:14,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:42:14,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:42:14,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:42:14,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:42:14,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:42:14,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:42:14,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:42:14,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:42:14,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:42:14,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:42:14,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:42:14,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:42:14,454 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:42:14,471 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:42:14,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:42:14,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:42:14,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:42:14,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:42:14,472 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:42:14,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:42:14,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:42:14,473 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:42:14,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:42:14,473 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:42:14,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:42:14,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:42:14,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:42:14,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:42:14,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:42:14,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:42:14,474 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:42:14,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:42:14,474 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:42:14,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:42:14,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:42:14,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:42:14,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:42:14,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:42:14,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:42:14,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:42:14,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:42:14,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:42:14,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:42:14,475 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:42:14,476 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:42:14,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:42:14,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:42:14,476 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_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d [2021-12-06 20:42:14,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:42:14,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:42:14,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:42:14,687 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:42:14,687 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:42:14,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2021-12-06 20:42:14,731 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/data/e58682459/e39dae179b2244b89885b41607500806/FLAGae8e35c90 [2021-12-06 20:42:15,103 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:42:15,104 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2021-12-06 20:42:15,109 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/data/e58682459/e39dae179b2244b89885b41607500806/FLAGae8e35c90 [2021-12-06 20:42:15,118 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/data/e58682459/e39dae179b2244b89885b41607500806 [2021-12-06 20:42:15,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:42:15,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:42:15,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:42:15,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:42:15,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:42:15,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:42:15" (1/1) ... [2021-12-06 20:42:15,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@102862c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:42:15, skipping insertion in model container [2021-12-06 20:42:15,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:42:15" (1/1) ... [2021-12-06 20:42:15,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:42:15,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:42:15,258 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_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c[535,548] [2021-12-06 20:42:15,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:42:15,286 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:42:15,298 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_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c[535,548] [2021-12-06 20:42:15,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:42:15,314 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:42:15,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:42:15 WrapperNode [2021-12-06 20:42:15,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:42:15,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:42:15,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:42:15,316 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:42:15,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:42:15" (1/1) ... [2021-12-06 20:42:15,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:42:15" (1/1) ... [2021-12-06 20:42:15,340 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-12-06 20:42:15,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:42:15,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:42:15,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:42:15,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:42:15,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:42:15" (1/1) ... [2021-12-06 20:42:15,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:42:15" (1/1) ... [2021-12-06 20:42:15,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:42:15" (1/1) ... [2021-12-06 20:42:15,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:42:15" (1/1) ... [2021-12-06 20:42:15,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:42:15" (1/1) ... [2021-12-06 20:42:15,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:42:15" (1/1) ... [2021-12-06 20:42:15,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:42:15" (1/1) ... [2021-12-06 20:42:15,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:42:15,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:42:15,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:42:15,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:42:15,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:42:15" (1/1) ... [2021-12-06 20:42:15,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:42:15,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:15,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:42:15,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:42:15,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:42:15,419 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 20:42:15,419 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 20:42:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:42:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:42:15,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:42:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 20:42:15,420 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 20:42:15,468 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:42:15,470 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:42:15,567 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:42:15,571 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:42:15,572 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 20:42:15,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:42:15 BoogieIcfgContainer [2021-12-06 20:42:15,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:42:15,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:42:15,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:42:15,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:42:15,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:42:15" (1/3) ... [2021-12-06 20:42:15,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6783d4bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:42:15, skipping insertion in model container [2021-12-06 20:42:15,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:42:15" (2/3) ... [2021-12-06 20:42:15,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6783d4bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:42:15, skipping insertion in model container [2021-12-06 20:42:15,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:42:15" (3/3) ... [2021-12-06 20:42:15,579 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound50.c [2021-12-06 20:42:15,583 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:42:15,583 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:42:15,620 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:42:15,625 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 20:42:15,626 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:42:15,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 20:42:15,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 20:42:15,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:15,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:15,643 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2021-12-06 20:42:15,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:15,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565841974] [2021-12-06 20:42:15,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:15,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:15,718 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:15,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373547975] [2021-12-06 20:42:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:15,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:15,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:15,720 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:15,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:42:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:42:15,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 20:42:15,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:42:15,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:42:15,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:15,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565841974] [2021-12-06 20:42:15,833 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:15,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373547975] [2021-12-06 20:42:15,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373547975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:42:15,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:42:15,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:42:15,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278089319] [2021-12-06 20:42:15,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:42:15,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 20:42:15,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:15,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 20:42:15,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:42:15,862 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:42:15,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:15,878 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2021-12-06 20:42:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 20:42:15,880 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-06 20:42:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:15,885 INFO L225 Difference]: With dead ends: 61 [2021-12-06 20:42:15,885 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 20:42:15,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 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 20:42:15,891 INFO L933 BasicCegarLoop]: 41 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, 41 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 20:42:15,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:42:15,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 20:42:15,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-06 20:42:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 20:42:15,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2021-12-06 20:42:15,919 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2021-12-06 20:42:15,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:15,920 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2021-12-06 20:42:15,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:42:15,920 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2021-12-06 20:42:15,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 20:42:15,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:15,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:15,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:42:16,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-06 20:42:16,124 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:16,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:16,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2021-12-06 20:42:16,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:16,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595011408] [2021-12-06 20:42:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:16,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:16,165 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:16,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888610246] [2021-12-06 20:42:16,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:16,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:16,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:16,171 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:16,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:42:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:42:16,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:42:16,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:42:16,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:42:16,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:16,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595011408] [2021-12-06 20:42:16,407 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:16,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888610246] [2021-12-06 20:42:16,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888610246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:42:16,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:42:16,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:42:16,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852339683] [2021-12-06 20:42:16,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:42:16,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:42:16,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:16,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:42:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:42:16,409 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:42:16,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:16,428 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-12-06 20:42:16,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:42:16,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-06 20:42:16,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:16,429 INFO L225 Difference]: With dead ends: 37 [2021-12-06 20:42:16,429 INFO L226 Difference]: Without dead ends: 30 [2021-12-06 20:42:16,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:42:16,431 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:16,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:42:16,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-06 20:42:16,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-06 20:42:16,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 20:42:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-12-06 20:42:16,437 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2021-12-06 20:42:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:16,438 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-12-06 20:42:16,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:42:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-12-06 20:42:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 20:42:16,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:16,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:16,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:42:16,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:16,641 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:16,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:16,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2021-12-06 20:42:16,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:16,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785538665] [2021-12-06 20:42:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:16,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:16,673 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:16,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096562259] [2021-12-06 20:42:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:16,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:16,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:16,678 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:16,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:42:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:42:16,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 20:42:16,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:42:16,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:42:16,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:16,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785538665] [2021-12-06 20:42:16,969 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:16,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096562259] [2021-12-06 20:42:16,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096562259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:42:16,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:42:16,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:42:16,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524090826] [2021-12-06 20:42:16,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:42:16,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:42:16,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:16,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:42:16,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:42:16,971 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:42:19,813 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:42:21,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:42:21,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:21,297 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-12-06 20:42:21,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:42:21,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-06 20:42:21,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:21,299 INFO L225 Difference]: With dead ends: 49 [2021-12-06 20:42:21,299 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 20:42:21,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:42:21,300 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:21,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 110 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-06 20:42:21,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 20:42:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-06 20:42:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 20:42:21,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-12-06 20:42:21,309 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2021-12-06 20:42:21,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:21,309 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-12-06 20:42:21,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:42:21,309 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-12-06 20:42:21,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 20:42:21,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:21,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:21,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 20:42:21,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:21,513 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:21,515 INFO L85 PathProgramCache]: Analyzing trace with hash -82041861, now seen corresponding path program 1 times [2021-12-06 20:42:21,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:21,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713274648] [2021-12-06 20:42:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:21,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:21,541 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:21,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46549442] [2021-12-06 20:42:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:21,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:21,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:21,545 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:21,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:42:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:42:21,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:42:21,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:42:21,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:42:21,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:21,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713274648] [2021-12-06 20:42:21,775 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:21,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46549442] [2021-12-06 20:42:21,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46549442] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:42:21,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:42:21,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-12-06 20:42:21,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900524962] [2021-12-06 20:42:21,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:42:21,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 20:42:21,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:21,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 20:42:21,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:42:21,777 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 20:42:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:21,871 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2021-12-06 20:42:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:42:21,871 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2021-12-06 20:42:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:21,872 INFO L225 Difference]: With dead ends: 53 [2021-12-06 20:42:21,872 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 20:42:21,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:42:21,873 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:21,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 161 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:42:21,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 20:42:21,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2021-12-06 20:42:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 20:42:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-06 20:42:21,881 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2021-12-06 20:42:21,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:21,882 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-06 20:42:21,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 20:42:21,882 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-06 20:42:21,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 20:42:21,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:21,883 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:21,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 20:42:22,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:22,085 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:22,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:22,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1145481658, now seen corresponding path program 1 times [2021-12-06 20:42:22,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:22,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008334366] [2021-12-06 20:42:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:22,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:22,112 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:22,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161136536] [2021-12-06 20:42:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:22,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:22,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:22,117 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:22,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:42:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:42:22,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 20:42:22,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:42:22,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:42:22,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:22,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008334366] [2021-12-06 20:42:22,244 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:22,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161136536] [2021-12-06 20:42:22,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161136536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:42:22,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:42:22,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:42:22,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235611988] [2021-12-06 20:42:22,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:42:22,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:42:22,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:22,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:42:22,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:42:22,246 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:42:22,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:22,266 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-12-06 20:42:22,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:42:22,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-12-06 20:42:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:22,267 INFO L225 Difference]: With dead ends: 61 [2021-12-06 20:42:22,267 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 20:42:22,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:42:22,268 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:22,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 93 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:42:22,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 20:42:22,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-06 20:42:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 20:42:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-12-06 20:42:22,274 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2021-12-06 20:42:22,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:22,275 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-12-06 20:42:22,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:42:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-12-06 20:42:22,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 20:42:22,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:22,276 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:22,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 20:42:22,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:22,477 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:22,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:22,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1102972225, now seen corresponding path program 1 times [2021-12-06 20:42:22,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:22,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981800031] [2021-12-06 20:42:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:22,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:22,504 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:22,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778447590] [2021-12-06 20:42:22,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:22,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:22,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:22,508 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:22,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:42:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:42:22,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:42:22,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:42:22,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:42:22,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:22,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981800031] [2021-12-06 20:42:22,702 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:22,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778447590] [2021-12-06 20:42:22,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778447590] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 20:42:22,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:42:22,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2021-12-06 20:42:22,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179128562] [2021-12-06 20:42:22,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:42:22,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:42:22,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:22,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:42:22,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:42:22,704 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 20:42:22,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:22,728 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2021-12-06 20:42:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:42:22,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2021-12-06 20:42:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:22,729 INFO L225 Difference]: With dead ends: 70 [2021-12-06 20:42:22,730 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 20:42:22,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:42:22,731 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 29 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:22,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 99 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:42:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 20:42:22,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-12-06 20:42:22,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 20:42:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-12-06 20:42:22,737 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2021-12-06 20:42:22,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:22,738 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-12-06 20:42:22,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 20:42:22,738 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-12-06 20:42:22,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 20:42:22,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:22,739 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:22,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 20:42:22,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:22,941 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:22,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:22,943 INFO L85 PathProgramCache]: Analyzing trace with hash 30895492, now seen corresponding path program 1 times [2021-12-06 20:42:22,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:22,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684215229] [2021-12-06 20:42:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:22,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:22,966 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:22,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427776299] [2021-12-06 20:42:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:22,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:22,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:22,971 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:22,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:42:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:42:23,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:42:23,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:42:23,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:42:23,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:23,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684215229] [2021-12-06 20:42:23,158 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:23,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427776299] [2021-12-06 20:42:23,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427776299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:42:23,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:42:23,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-12-06 20:42:23,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089103296] [2021-12-06 20:42:23,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:42:23,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 20:42:23,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:23,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 20:42:23,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:42:23,160 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 20:42:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:23,255 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2021-12-06 20:42:23,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 20:42:23,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2021-12-06 20:42:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:23,257 INFO L225 Difference]: With dead ends: 125 [2021-12-06 20:42:23,257 INFO L226 Difference]: Without dead ends: 104 [2021-12-06 20:42:23,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:42:23,258 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 90 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:23,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 165 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:42:23,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-06 20:42:23,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2021-12-06 20:42:23,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 20:42:23,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2021-12-06 20:42:23,271 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 39 [2021-12-06 20:42:23,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:23,271 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2021-12-06 20:42:23,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 20:42:23,272 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2021-12-06 20:42:23,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 20:42:23,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:23,273 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:23,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 20:42:23,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 20:42:23,474 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:23,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:23,475 INFO L85 PathProgramCache]: Analyzing trace with hash -798356602, now seen corresponding path program 1 times [2021-12-06 20:42:23,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:23,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612137075] [2021-12-06 20:42:23,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:23,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:23,488 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:23,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982437282] [2021-12-06 20:42:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:23,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:23,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:23,491 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:23,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:42:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:42:23,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:42:23,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 20:42:23,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:42:23,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:23,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612137075] [2021-12-06 20:42:23,593 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:23,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982437282] [2021-12-06 20:42:23,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982437282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:42:23,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:42:23,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:42:23,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18513758] [2021-12-06 20:42:23,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:42:23,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:42:23,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:23,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:42:23,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:42:23,595 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 20:42:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:23,624 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2021-12-06 20:42:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:42:23,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2021-12-06 20:42:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:23,627 INFO L225 Difference]: With dead ends: 154 [2021-12-06 20:42:23,627 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 20:42:23,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:42:23,628 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 23 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:23,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 91 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:42:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 20:42:23,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2021-12-06 20:42:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 20:42:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2021-12-06 20:42:23,649 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 43 [2021-12-06 20:42:23,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:23,649 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2021-12-06 20:42:23,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 20:42:23,650 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2021-12-06 20:42:23,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 20:42:23,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:23,651 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:23,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 20:42:23,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:23,853 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:23,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:23,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1023958197, now seen corresponding path program 1 times [2021-12-06 20:42:23,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:23,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4289840] [2021-12-06 20:42:23,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:23,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:23,885 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:23,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599426527] [2021-12-06 20:42:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:23,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:23,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:23,890 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:23,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 20:42:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:42:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 20:42:23,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:42:24,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 20:42:24,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:24,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4289840] [2021-12-06 20:42:24,118 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:24,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599426527] [2021-12-06 20:42:24,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599426527] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:42:24,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:42:24,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-12-06 20:42:24,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937402448] [2021-12-06 20:42:24,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:42:24,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 20:42:24,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:24,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 20:42:24,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:42:24,120 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-06 20:42:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:24,251 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2021-12-06 20:42:24,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 20:42:24,251 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2021-12-06 20:42:24,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:24,253 INFO L225 Difference]: With dead ends: 215 [2021-12-06 20:42:24,253 INFO L226 Difference]: Without dead ends: 168 [2021-12-06 20:42:24,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:42:24,254 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 140 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:24,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 199 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:42:24,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-06 20:42:24,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2021-12-06 20:42:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 112 states have internal predecessors, (138), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-06 20:42:24,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2021-12-06 20:42:24,270 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 45 [2021-12-06 20:42:24,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:24,270 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2021-12-06 20:42:24,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-06 20:42:24,271 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2021-12-06 20:42:24,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 20:42:24,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:24,272 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:24,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 20:42:24,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:24,472 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:24,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:24,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1104536814, now seen corresponding path program 1 times [2021-12-06 20:42:24,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:24,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055769557] [2021-12-06 20:42:24,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:24,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:24,478 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:24,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464558906] [2021-12-06 20:42:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:24,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:24,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:24,480 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:24,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 20:42:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:42:24,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 20:42:24,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:42:24,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 20:42:24,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:24,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055769557] [2021-12-06 20:42:24,663 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:24,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464558906] [2021-12-06 20:42:24,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464558906] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:42:24,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:42:24,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-06 20:42:24,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365307226] [2021-12-06 20:42:24,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:42:24,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 20:42:24,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:24,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 20:42:24,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:42:24,665 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-06 20:42:24,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:24,832 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2021-12-06 20:42:24,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 20:42:24,833 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 51 [2021-12-06 20:42:24,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:24,834 INFO L225 Difference]: With dead ends: 207 [2021-12-06 20:42:24,834 INFO L226 Difference]: Without dead ends: 202 [2021-12-06 20:42:24,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:42:24,835 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 242 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:24,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 276 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:42:24,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-06 20:42:24,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2021-12-06 20:42:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 148 states have internal predecessors, (178), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-06 20:42:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2021-12-06 20:42:24,853 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 51 [2021-12-06 20:42:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:24,853 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2021-12-06 20:42:24,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-06 20:42:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2021-12-06 20:42:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 20:42:24,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:24,856 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:24,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 20:42:25,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 20:42:25,058 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:25,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:25,059 INFO L85 PathProgramCache]: Analyzing trace with hash 540498080, now seen corresponding path program 1 times [2021-12-06 20:42:25,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:25,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711654185] [2021-12-06 20:42:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:25,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:25,082 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:25,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274230769] [2021-12-06 20:42:25,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:25,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:25,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:25,086 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:25,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 20:42:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:42:25,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:42:25,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-06 20:42:25,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-06 20:42:25,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:25,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711654185] [2021-12-06 20:42:25,405 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:25,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274230769] [2021-12-06 20:42:25,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274230769] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:42:25,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:42:25,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-06 20:42:25,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277790132] [2021-12-06 20:42:25,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:42:25,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:42:25,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:25,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:42:25,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:42:25,407 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 20:42:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:25,456 INFO L93 Difference]: Finished difference Result 498 states and 693 transitions. [2021-12-06 20:42:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:42:25,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2021-12-06 20:42:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:25,459 INFO L225 Difference]: With dead ends: 498 [2021-12-06 20:42:25,459 INFO L226 Difference]: Without dead ends: 355 [2021-12-06 20:42:25,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:42:25,461 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 16 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:25,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 151 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:42:25,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-06 20:42:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 338. [2021-12-06 20:42:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 254 states have (on average 1.2677165354330708) internal successors, (322), 260 states have internal predecessors, (322), 72 states have call successors, (72), 12 states have call predecessors, (72), 11 states have return successors, (71), 65 states have call predecessors, (71), 71 states have call successors, (71) [2021-12-06 20:42:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 465 transitions. [2021-12-06 20:42:25,491 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 465 transitions. Word has length 87 [2021-12-06 20:42:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:25,491 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 465 transitions. [2021-12-06 20:42:25,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 20:42:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 465 transitions. [2021-12-06 20:42:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 20:42:25,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:25,493 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:25,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 20:42:25,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:25,694 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:25,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:25,695 INFO L85 PathProgramCache]: Analyzing trace with hash -134976430, now seen corresponding path program 2 times [2021-12-06 20:42:25,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:25,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445860413] [2021-12-06 20:42:25,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:25,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:25,703 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:25,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857303256] [2021-12-06 20:42:25,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:42:25,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:25,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:25,705 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:25,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 20:42:25,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:42:25,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:42:25,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 20:42:25,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:42:25,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-06 20:42:26,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445860413] [2021-12-06 20:42:26,074 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:26,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857303256] [2021-12-06 20:42:26,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857303256] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:42:26,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:42:26,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-12-06 20:42:26,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715294840] [2021-12-06 20:42:26,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:42:26,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 20:42:26,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 20:42:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:42:26,076 INFO L87 Difference]: Start difference. First operand 338 states and 465 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2021-12-06 20:42:26,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:26,500 INFO L93 Difference]: Finished difference Result 981 states and 1419 transitions. [2021-12-06 20:42:26,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 20:42:26,501 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) Word has length 87 [2021-12-06 20:42:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:26,508 INFO L225 Difference]: With dead ends: 981 [2021-12-06 20:42:26,508 INFO L226 Difference]: Without dead ends: 838 [2021-12-06 20:42:26,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 20:42:26,511 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 414 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:26,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 424 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:42:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-12-06 20:42:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 789. [2021-12-06 20:42:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 596 states have (on average 1.2684563758389262) internal successors, (756), 605 states have internal predecessors, (756), 175 states have call successors, (175), 18 states have call predecessors, (175), 17 states have return successors, (174), 165 states have call predecessors, (174), 174 states have call successors, (174) [2021-12-06 20:42:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1105 transitions. [2021-12-06 20:42:26,598 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1105 transitions. Word has length 87 [2021-12-06 20:42:26,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:26,598 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 1105 transitions. [2021-12-06 20:42:26,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2021-12-06 20:42:26,599 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1105 transitions. [2021-12-06 20:42:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 20:42:26,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:26,601 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:26,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 20:42:26,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:26,801 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2132027339, now seen corresponding path program 1 times [2021-12-06 20:42:26,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:26,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054191228] [2021-12-06 20:42:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:26,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:26,808 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:26,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879624562] [2021-12-06 20:42:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:26,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:26,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:26,810 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:26,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 20:42:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:42:26,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 20:42:26,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:42:26,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-06 20:42:27,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:27,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054191228] [2021-12-06 20:42:27,167 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:27,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879624562] [2021-12-06 20:42:27,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879624562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:42:27,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:42:27,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-12-06 20:42:27,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412405872] [2021-12-06 20:42:27,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:42:27,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 20:42:27,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:27,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 20:42:27,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2021-12-06 20:42:27,169 INFO L87 Difference]: Start difference. First operand 789 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2021-12-06 20:42:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:27,632 INFO L93 Difference]: Finished difference Result 1281 states and 1795 transitions. [2021-12-06 20:42:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 20:42:27,633 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 93 [2021-12-06 20:42:27,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:27,638 INFO L225 Difference]: With dead ends: 1281 [2021-12-06 20:42:27,638 INFO L226 Difference]: Without dead ends: 791 [2021-12-06 20:42:27,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 20:42:27,641 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 405 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:27,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 442 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:42:27,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-12-06 20:42:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 736. [2021-12-06 20:42:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 552 states have (on average 1.2210144927536233) internal successors, (674), 556 states have internal predecessors, (674), 162 states have call successors, (162), 22 states have call predecessors, (162), 21 states have return successors, (161), 157 states have call predecessors, (161), 161 states have call successors, (161) [2021-12-06 20:42:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 997 transitions. [2021-12-06 20:42:27,701 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 997 transitions. Word has length 93 [2021-12-06 20:42:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:27,701 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 997 transitions. [2021-12-06 20:42:27,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2021-12-06 20:42:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 997 transitions. [2021-12-06 20:42:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 20:42:27,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:27,703 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:27,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 20:42:27,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:27,904 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash 519126930, now seen corresponding path program 1 times [2021-12-06 20:42:27,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:27,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106384236] [2021-12-06 20:42:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:27,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:27,910 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:27,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877785945] [2021-12-06 20:42:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:27,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:27,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:27,911 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:27,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 20:42:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:42:27,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 20:42:27,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:42:28,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-06 20:42:28,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:28,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106384236] [2021-12-06 20:42:28,301 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:28,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877785945] [2021-12-06 20:42:28,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877785945] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:42:28,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:42:28,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-12-06 20:42:28,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110928910] [2021-12-06 20:42:28,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:42:28,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 20:42:28,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:28,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 20:42:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2021-12-06 20:42:28,303 INFO L87 Difference]: Start difference. First operand 736 states and 997 transitions. Second operand has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2021-12-06 20:42:28,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:28,890 INFO L93 Difference]: Finished difference Result 846 states and 1157 transitions. [2021-12-06 20:42:28,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 20:42:28,891 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 99 [2021-12-06 20:42:28,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:28,896 INFO L225 Difference]: With dead ends: 846 [2021-12-06 20:42:28,896 INFO L226 Difference]: Without dead ends: 841 [2021-12-06 20:42:28,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=670, Invalid=1222, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 20:42:28,897 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 627 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:28,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 429 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:42:28,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-12-06 20:42:28,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 826. [2021-12-06 20:42:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 620 states have (on average 1.2) internal successors, (744), 626 states have internal predecessors, (744), 182 states have call successors, (182), 24 states have call predecessors, (182), 23 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2021-12-06 20:42:28,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1107 transitions. [2021-12-06 20:42:28,959 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1107 transitions. Word has length 99 [2021-12-06 20:42:28,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:28,960 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1107 transitions. [2021-12-06 20:42:28,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2021-12-06 20:42:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1107 transitions. [2021-12-06 20:42:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-06 20:42:28,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:28,964 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 9, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:28,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 20:42:29,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 20:42:29,164 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:29,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:29,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1985812011, now seen corresponding path program 3 times [2021-12-06 20:42:29,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:29,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078638541] [2021-12-06 20:42:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:29,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:29,172 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:29,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820984370] [2021-12-06 20:42:29,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:42:29,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:29,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:29,173 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:29,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 20:42:29,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 20:42:29,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:42:29,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:42:29,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-12-06 20:42:29,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:42:29,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:29,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078638541] [2021-12-06 20:42:29,336 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:29,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820984370] [2021-12-06 20:42:29,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820984370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:42:29,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:42:29,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:42:29,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805147467] [2021-12-06 20:42:29,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:42:29,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:42:29,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:29,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:42:29,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:42:29,337 INFO L87 Difference]: Start difference. First operand 826 states and 1107 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 20:42:29,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:29,410 INFO L93 Difference]: Finished difference Result 1124 states and 1528 transitions. [2021-12-06 20:42:29,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:42:29,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 177 [2021-12-06 20:42:29,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:29,417 INFO L225 Difference]: With dead ends: 1124 [2021-12-06 20:42:29,417 INFO L226 Difference]: Without dead ends: 905 [2021-12-06 20:42:29,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:42:29,418 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:29,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 149 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:42:29,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-12-06 20:42:29,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 838. [2021-12-06 20:42:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 631 states have (on average 1.185419968304279) internal successors, (748), 637 states have internal predecessors, (748), 182 states have call successors, (182), 25 states have call predecessors, (182), 24 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2021-12-06 20:42:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1111 transitions. [2021-12-06 20:42:29,478 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1111 transitions. Word has length 177 [2021-12-06 20:42:29,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:29,478 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1111 transitions. [2021-12-06 20:42:29,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 20:42:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1111 transitions. [2021-12-06 20:42:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-06 20:42:29,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:29,482 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:29,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 20:42:29,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 20:42:29,682 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:29,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:29,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1801897766, now seen corresponding path program 4 times [2021-12-06 20:42:29,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:29,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481076314] [2021-12-06 20:42:29,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:29,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:29,690 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:29,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505225255] [2021-12-06 20:42:29,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:42:29,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:29,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:29,691 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:29,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 20:42:29,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:42:29,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:42:29,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 20:42:29,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 612 proven. 0 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2021-12-06 20:42:29,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:42:29,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:29,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481076314] [2021-12-06 20:42:29,862 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:29,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505225255] [2021-12-06 20:42:29,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505225255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:42:29,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:42:29,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:42:29,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727594869] [2021-12-06 20:42:29,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:42:29,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:42:29,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:29,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:42:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:42:29,863 INFO L87 Difference]: Start difference. First operand 838 states and 1111 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 20:42:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:29,914 INFO L93 Difference]: Finished difference Result 1423 states and 1887 transitions. [2021-12-06 20:42:29,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:42:29,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 183 [2021-12-06 20:42:29,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:29,919 INFO L225 Difference]: With dead ends: 1423 [2021-12-06 20:42:29,919 INFO L226 Difference]: Without dead ends: 899 [2021-12-06 20:42:29,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 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 20:42:29,921 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:29,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:42:29,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-12-06 20:42:29,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 830. [2021-12-06 20:42:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 626 states have (on average 1.1789137380191694) internal successors, (738), 634 states have internal predecessors, (738), 179 states have call successors, (179), 25 states have call predecessors, (179), 24 states have return successors, (178), 170 states have call predecessors, (178), 178 states have call successors, (178) [2021-12-06 20:42:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1095 transitions. [2021-12-06 20:42:29,972 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1095 transitions. Word has length 183 [2021-12-06 20:42:29,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:29,972 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1095 transitions. [2021-12-06 20:42:29,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 20:42:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1095 transitions. [2021-12-06 20:42:29,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-06 20:42:29,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:29,976 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:29,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 20:42:30,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 20:42:30,177 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:30,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:30,177 INFO L85 PathProgramCache]: Analyzing trace with hash -670817854, now seen corresponding path program 5 times [2021-12-06 20:42:30,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:30,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859999102] [2021-12-06 20:42:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:30,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:30,184 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:30,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301019121] [2021-12-06 20:42:30,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:42:30,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:30,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:30,185 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:30,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 20:42:30,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-06 20:42:30,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:42:30,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:42:30,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2021-12-06 20:42:30,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:42:30,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:30,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859999102] [2021-12-06 20:42:30,473 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:30,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301019121] [2021-12-06 20:42:30,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301019121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:42:30,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:42:30,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:42:30,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307646611] [2021-12-06 20:42:30,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:42:30,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:42:30,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:30,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:42:30,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:42:30,475 INFO L87 Difference]: Start difference. First operand 830 states and 1095 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 20:42:30,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:30,526 INFO L93 Difference]: Finished difference Result 883 states and 1153 transitions. [2021-12-06 20:42:30,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:42:30,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 183 [2021-12-06 20:42:30,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:30,532 INFO L225 Difference]: With dead ends: 883 [2021-12-06 20:42:30,532 INFO L226 Difference]: Without dead ends: 798 [2021-12-06 20:42:30,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:42:30,534 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 12 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:30,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:42:30,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-12-06 20:42:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 777. [2021-12-06 20:42:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 586 states have (on average 1.1706484641638226) internal successors, (686), 593 states have internal predecessors, (686), 166 states have call successors, (166), 25 states have call predecessors, (166), 24 states have return successors, (165), 158 states have call predecessors, (165), 165 states have call successors, (165) [2021-12-06 20:42:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1017 transitions. [2021-12-06 20:42:30,581 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1017 transitions. Word has length 183 [2021-12-06 20:42:30,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:30,582 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1017 transitions. [2021-12-06 20:42:30,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 20:42:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1017 transitions. [2021-12-06 20:42:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-06 20:42:30,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:30,584 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:30,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 20:42:30,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 20:42:30,785 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:30,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:30,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1332064508, now seen corresponding path program 6 times [2021-12-06 20:42:30,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:30,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892481614] [2021-12-06 20:42:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:30,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:30,796 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:30,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421513511] [2021-12-06 20:42:30,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:42:30,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:30,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:30,797 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:30,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 20:42:33,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-06 20:42:33,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:42:33,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 20:42:33,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 192 proven. 140 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2021-12-06 20:42:33,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 192 proven. 140 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2021-12-06 20:42:34,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:34,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892481614] [2021-12-06 20:42:34,105 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:34,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421513511] [2021-12-06 20:42:34,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421513511] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:42:34,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:42:34,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-06 20:42:34,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415720256] [2021-12-06 20:42:34,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:42:34,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 20:42:34,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:34,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 20:42:34,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-12-06 20:42:34,106 INFO L87 Difference]: Start difference. First operand 777 states and 1017 transitions. Second operand has 18 states, 18 states have (on average 6.333333333333333) internal successors, (114), 18 states have internal predecessors, (114), 18 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2021-12-06 20:42:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:40,731 INFO L93 Difference]: Finished difference Result 4123 states and 5725 transitions. [2021-12-06 20:42:40,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-06 20:42:40,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.333333333333333) internal successors, (114), 18 states have internal predecessors, (114), 18 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) Word has length 183 [2021-12-06 20:42:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:40,748 INFO L225 Difference]: With dead ends: 4123 [2021-12-06 20:42:40,748 INFO L226 Difference]: Without dead ends: 3828 [2021-12-06 20:42:40,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1256, Invalid=5550, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 20:42:40,752 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 533 mSDsluCounter, 2558 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 2961 SdHoareTripleChecker+Invalid, 2507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 438 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:40,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 2961 Invalid, 2507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 1660 Invalid, 0 Unknown, 438 Unchecked, 1.5s Time] [2021-12-06 20:42:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3828 states. [2021-12-06 20:42:40,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3828 to 2443. [2021-12-06 20:42:40,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 1852 states have (on average 1.2300215982721383) internal successors, (2278), 1887 states have internal predecessors, (2278), 566 states have call successors, (566), 25 states have call predecessors, (566), 24 states have return successors, (565), 530 states have call predecessors, (565), 565 states have call successors, (565) [2021-12-06 20:42:41,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 3409 transitions. [2021-12-06 20:42:41,008 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 3409 transitions. Word has length 183 [2021-12-06 20:42:41,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:41,008 INFO L470 AbstractCegarLoop]: Abstraction has 2443 states and 3409 transitions. [2021-12-06 20:42:41,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.333333333333333) internal successors, (114), 18 states have internal predecessors, (114), 18 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2021-12-06 20:42:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 3409 transitions. [2021-12-06 20:42:41,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-06 20:42:41,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:41,016 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 9, 8, 8, 8, 8, 8, 8, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:41,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 20:42:41,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 20:42:41,217 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:41,217 INFO L85 PathProgramCache]: Analyzing trace with hash -601397856, now seen corresponding path program 7 times [2021-12-06 20:42:41,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:41,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060400934] [2021-12-06 20:42:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:41,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:41,234 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:41,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643192595] [2021-12-06 20:42:41,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:42:41,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:41,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:41,236 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:41,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 20:42:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:42:41,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 20:42:41,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2021-12-06 20:42:41,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-12-06 20:42:41,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:41,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060400934] [2021-12-06 20:42:41,805 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:41,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643192595] [2021-12-06 20:42:41,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643192595] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:42:41,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:42:41,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-06 20:42:41,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11678020] [2021-12-06 20:42:41,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:42:41,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 20:42:41,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:41,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 20:42:41,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:42:41,807 INFO L87 Difference]: Start difference. First operand 2443 states and 3409 transitions. Second operand has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2021-12-06 20:42:42,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:42,912 INFO L93 Difference]: Finished difference Result 5571 states and 7891 transitions. [2021-12-06 20:42:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 20:42:42,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) Word has length 183 [2021-12-06 20:42:42,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:42,931 INFO L225 Difference]: With dead ends: 5571 [2021-12-06 20:42:42,931 INFO L226 Difference]: Without dead ends: 4349 [2021-12-06 20:42:42,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 20:42:42,935 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 179 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:42,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1103 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:42:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2021-12-06 20:42:43,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 3548. [2021-12-06 20:42:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3548 states, 2684 states have (on average 1.222429210134128) internal successors, (3281), 2738 states have internal predecessors, (3281), 839 states have call successors, (839), 25 states have call predecessors, (839), 24 states have return successors, (838), 784 states have call predecessors, (838), 838 states have call successors, (838) [2021-12-06 20:42:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 4958 transitions. [2021-12-06 20:42:43,307 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 4958 transitions. Word has length 183 [2021-12-06 20:42:43,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:43,307 INFO L470 AbstractCegarLoop]: Abstraction has 3548 states and 4958 transitions. [2021-12-06 20:42:43,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2021-12-06 20:42:43,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 4958 transitions. [2021-12-06 20:42:43,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-06 20:42:43,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:43,319 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:43,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 20:42:43,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:43,520 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:43,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:43,521 INFO L85 PathProgramCache]: Analyzing trace with hash 144972548, now seen corresponding path program 8 times [2021-12-06 20:42:43,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:43,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48762045] [2021-12-06 20:42:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:43,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:43,528 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:43,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457482762] [2021-12-06 20:42:43,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:42:43,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:43,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:43,529 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:43,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 20:42:43,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:42:43,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:42:43,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 20:42:43,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 80 proven. 252 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2021-12-06 20:42:43,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 80 proven. 252 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2021-12-06 20:42:44,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:44,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48762045] [2021-12-06 20:42:44,038 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:44,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457482762] [2021-12-06 20:42:44,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457482762] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:42:44,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:42:44,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-06 20:42:44,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032202505] [2021-12-06 20:42:44,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:42:44,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 20:42:44,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:44,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 20:42:44,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:42:44,040 INFO L87 Difference]: Start difference. First operand 3548 states and 4958 transitions. Second operand has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 20 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2021-12-06 20:42:47,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:47,955 INFO L93 Difference]: Finished difference Result 9328 states and 13208 transitions. [2021-12-06 20:42:47,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-06 20:42:47,956 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 20 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) Word has length 183 [2021-12-06 20:42:47,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:47,992 INFO L225 Difference]: With dead ends: 9328 [2021-12-06 20:42:47,992 INFO L226 Difference]: Without dead ends: 8358 [2021-12-06 20:42:47,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1198, Invalid=7922, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 20:42:47,998 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 424 mSDsluCounter, 3424 mSDsCounter, 0 mSdLazyCounter, 2563 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 3891 SdHoareTripleChecker+Invalid, 2902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:47,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 3891 Invalid, 2902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2563 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 20:42:48,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2021-12-06 20:42:48,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 6524. [2021-12-06 20:42:48,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6524 states, 4924 states have (on average 1.2303005686433794) internal successors, (6058), 5046 states have internal predecessors, (6058), 1575 states have call successors, (1575), 25 states have call predecessors, (1575), 24 states have return successors, (1574), 1452 states have call predecessors, (1574), 1574 states have call successors, (1574) [2021-12-06 20:42:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6524 states to 6524 states and 9207 transitions. [2021-12-06 20:42:48,708 INFO L78 Accepts]: Start accepts. Automaton has 6524 states and 9207 transitions. Word has length 183 [2021-12-06 20:42:48,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:48,708 INFO L470 AbstractCegarLoop]: Abstraction has 6524 states and 9207 transitions. [2021-12-06 20:42:48,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 20 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2021-12-06 20:42:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 6524 states and 9207 transitions. [2021-12-06 20:42:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-06 20:42:48,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:48,726 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:48,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 20:42:48,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:48,928 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:48,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1027204868, now seen corresponding path program 9 times [2021-12-06 20:42:48,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:48,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279632315] [2021-12-06 20:42:48,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:48,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:48,955 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:48,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418452507] [2021-12-06 20:42:48,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:42:48,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:48,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:48,958 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:48,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 20:42:50,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-06 20:42:50,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:42:50,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 20:42:50,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 1044 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:42:50,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2021-12-06 20:42:51,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:51,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279632315] [2021-12-06 20:42:51,131 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:51,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418452507] [2021-12-06 20:42:51,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418452507] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:42:51,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:42:51,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2021-12-06 20:42:51,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885583614] [2021-12-06 20:42:51,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:42:51,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 20:42:51,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:51,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 20:42:51,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 20:42:51,134 INFO L87 Difference]: Start difference. First operand 6524 states and 9207 transitions. Second operand has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2021-12-06 20:42:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:55,309 INFO L93 Difference]: Finished difference Result 32301 states and 50042 transitions. [2021-12-06 20:42:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-06 20:42:55,311 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) Word has length 183 [2021-12-06 20:42:55,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:55,413 INFO L225 Difference]: With dead ends: 32301 [2021-12-06 20:42:55,413 INFO L226 Difference]: Without dead ends: 32106 [2021-12-06 20:42:55,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2691, Invalid=4619, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 20:42:55,422 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 1609 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 1156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1156 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:55,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1609 Valid, 834 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1156 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 20:42:55,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32106 states. [2021-12-06 20:42:58,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32106 to 31571. [2021-12-06 20:42:58,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31571 states, 23756 states have (on average 1.2964724701128136) internal successors, (30799), 23919 states have internal predecessors, (30799), 7770 states have call successors, (7770), 45 states have call predecessors, (7770), 44 states have return successors, (7769), 7606 states have call predecessors, (7769), 7769 states have call successors, (7769) [2021-12-06 20:42:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31571 states to 31571 states and 46338 transitions. [2021-12-06 20:42:58,608 INFO L78 Accepts]: Start accepts. Automaton has 31571 states and 46338 transitions. Word has length 183 [2021-12-06 20:42:58,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:58,608 INFO L470 AbstractCegarLoop]: Abstraction has 31571 states and 46338 transitions. [2021-12-06 20:42:58,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2021-12-06 20:42:58,609 INFO L276 IsEmpty]: Start isEmpty. Operand 31571 states and 46338 transitions. [2021-12-06 20:42:58,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-06 20:42:58,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:58,624 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 10, 10, 10, 10, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:58,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 20:42:58,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:58,824 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:58,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:58,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1981009717, now seen corresponding path program 2 times [2021-12-06 20:42:58,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:58,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466725321] [2021-12-06 20:42:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:58,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:58,831 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:58,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558789395] [2021-12-06 20:42:58,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:42:58,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:58,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:58,832 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:58,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 20:42:58,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:42:58,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:42:58,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 20:42:58,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 1142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:42:59,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2021-12-06 20:42:59,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:59,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466725321] [2021-12-06 20:42:59,716 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:59,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558789395] [2021-12-06 20:42:59,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558789395] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:42:59,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:42:59,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 48 [2021-12-06 20:42:59,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210782896] [2021-12-06 20:42:59,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:42:59,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 20:42:59,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:59,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 20:42:59,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 20:42:59,718 INFO L87 Difference]: Start difference. First operand 31571 states and 46338 transitions. Second operand has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2021-12-06 20:43:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:03,061 INFO L93 Difference]: Finished difference Result 45885 states and 68215 transitions. [2021-12-06 20:43:03,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-06 20:43:03,062 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) Word has length 189 [2021-12-06 20:43:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:03,116 INFO L225 Difference]: With dead ends: 45885 [2021-12-06 20:43:03,116 INFO L226 Difference]: Without dead ends: 21024 [2021-12-06 20:43:03,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2864, Invalid=4968, Unknown=0, NotChecked=0, Total=7832 [2021-12-06 20:43:03,167 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 1669 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 1047 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1669 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1047 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:03,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1669 Valid, 985 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1047 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:43:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21024 states. [2021-12-06 20:43:05,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21024 to 19808. [2021-12-06 20:43:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19808 states, 14876 states have (on average 1.217666039257865) internal successors, (18114), 14948 states have internal predecessors, (18114), 4885 states have call successors, (4885), 47 states have call predecessors, (4885), 46 states have return successors, (4884), 4812 states have call predecessors, (4884), 4884 states have call successors, (4884) [2021-12-06 20:43:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19808 states to 19808 states and 27883 transitions. [2021-12-06 20:43:05,117 INFO L78 Accepts]: Start accepts. Automaton has 19808 states and 27883 transitions. Word has length 189 [2021-12-06 20:43:05,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:05,117 INFO L470 AbstractCegarLoop]: Abstraction has 19808 states and 27883 transitions. [2021-12-06 20:43:05,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2021-12-06 20:43:05,117 INFO L276 IsEmpty]: Start isEmpty. Operand 19808 states and 27883 transitions. [2021-12-06 20:43:05,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-06 20:43:05,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:05,132 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 10, 10, 10, 10, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:05,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 20:43:05,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:05,332 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:05,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1075935086, now seen corresponding path program 2 times [2021-12-06 20:43:05,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:05,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270871347] [2021-12-06 20:43:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:05,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:05,340 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:43:05,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588619391] [2021-12-06 20:43:05,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:43:05,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:05,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:05,341 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:05,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 20:43:05,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:43:05,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:05,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 20:43:05,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 1248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:43:05,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2021-12-06 20:43:06,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:06,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270871347] [2021-12-06 20:43:06,252 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:43:06,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588619391] [2021-12-06 20:43:06,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588619391] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:06,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:43:06,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2021-12-06 20:43:06,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114305269] [2021-12-06 20:43:06,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:06,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 20:43:06,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:06,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 20:43:06,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 20:43:06,254 INFO L87 Difference]: Start difference. First operand 19808 states and 27883 transitions. Second operand has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2021-12-06 20:43:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:09,697 INFO L93 Difference]: Finished difference Result 21460 states and 30403 transitions. [2021-12-06 20:43:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-06 20:43:09,699 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) Word has length 195 [2021-12-06 20:43:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:09,727 INFO L225 Difference]: With dead ends: 21460 [2021-12-06 20:43:09,728 INFO L226 Difference]: Without dead ends: 21313 [2021-12-06 20:43:09,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3046, Invalid=5326, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 20:43:09,735 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 1405 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 1106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1405 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1106 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:09,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1405 Valid, 974 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1106 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 20:43:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21313 states. [2021-12-06 20:43:11,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21313 to 20450. [2021-12-06 20:43:11,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20450 states, 15369 states have (on average 1.1587611425596982) internal successors, (17809), 15493 states have internal predecessors, (17809), 5032 states have call successors, (5032), 49 states have call predecessors, (5032), 48 states have return successors, (5031), 4907 states have call predecessors, (5031), 5031 states have call successors, (5031) [2021-12-06 20:43:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20450 states to 20450 states and 27872 transitions. [2021-12-06 20:43:11,673 INFO L78 Accepts]: Start accepts. Automaton has 20450 states and 27872 transitions. Word has length 195 [2021-12-06 20:43:11,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:11,673 INFO L470 AbstractCegarLoop]: Abstraction has 20450 states and 27872 transitions. [2021-12-06 20:43:11,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2021-12-06 20:43:11,673 INFO L276 IsEmpty]: Start isEmpty. Operand 20450 states and 27872 transitions. [2021-12-06 20:43:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2021-12-06 20:43:11,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:11,711 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:11,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 20:43:11,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 20:43:11,912 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:11,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1339328528, now seen corresponding path program 10 times [2021-12-06 20:43:11,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:11,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227265097] [2021-12-06 20:43:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:11,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:11,922 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:43:11,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577449494] [2021-12-06 20:43:11,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:43:11,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:11,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:11,924 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:11,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 20:43:12,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:43:12,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:12,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 20:43:12,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 416 proven. 1164 refuted. 0 times theorem prover too weak. 3692 trivial. 0 not checked. [2021-12-06 20:43:12,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 266 proven. 1204 refuted. 0 times theorem prover too weak. 3802 trivial. 0 not checked. [2021-12-06 20:43:13,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:13,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227265097] [2021-12-06 20:43:13,301 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:43:13,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577449494] [2021-12-06 20:43:13,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577449494] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:13,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:43:13,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2021-12-06 20:43:13,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308738380] [2021-12-06 20:43:13,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:13,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 20:43:13,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:13,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 20:43:13,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-12-06 20:43:13,303 INFO L87 Difference]: Start difference. First operand 20450 states and 27872 transitions. Second operand has 32 states, 32 states have (on average 7.4375) internal successors, (238), 32 states have internal predecessors, (238), 32 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (74), 32 states have call predecessors, (74), 32 states have call successors, (74) [2021-12-06 20:43:16,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 20:43:18,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 20:43:21,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:21,976 INFO L93 Difference]: Finished difference Result 26321 states and 35913 transitions. [2021-12-06 20:43:21,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 20:43:21,977 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 7.4375) internal successors, (238), 32 states have internal predecessors, (238), 32 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (74), 32 states have call predecessors, (74), 32 states have call successors, (74) Word has length 375 [2021-12-06 20:43:21,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:22,015 INFO L225 Difference]: With dead ends: 26321 [2021-12-06 20:43:22,015 INFO L226 Difference]: Without dead ends: 22827 [2021-12-06 20:43:22,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 718 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=657, Invalid=3503, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 20:43:22,026 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 363 mSDsluCounter, 4293 mSDsCounter, 0 mSdLazyCounter, 2405 mSolverCounterSat, 223 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 4610 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 2405 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:22,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 4610 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 2405 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2021-12-06 20:43:22,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22827 states. [2021-12-06 20:43:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22827 to 20555. [2021-12-06 20:43:24,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20555 states, 15448 states have (on average 1.1587907819782497) internal successors, (17901), 15573 states have internal predecessors, (17901), 5058 states have call successors, (5058), 49 states have call predecessors, (5058), 48 states have return successors, (5057), 4932 states have call predecessors, (5057), 5057 states have call successors, (5057) [2021-12-06 20:43:24,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20555 states to 20555 states and 28016 transitions. [2021-12-06 20:43:24,209 INFO L78 Accepts]: Start accepts. Automaton has 20555 states and 28016 transitions. Word has length 375 [2021-12-06 20:43:24,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:24,210 INFO L470 AbstractCegarLoop]: Abstraction has 20555 states and 28016 transitions. [2021-12-06 20:43:24,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.4375) internal successors, (238), 32 states have internal predecessors, (238), 32 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (74), 32 states have call predecessors, (74), 32 states have call successors, (74) [2021-12-06 20:43:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 20555 states and 28016 transitions. [2021-12-06 20:43:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2021-12-06 20:43:24,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:24,242 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:24,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 20:43:24,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 20:43:24,443 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:24,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:24,444 INFO L85 PathProgramCache]: Analyzing trace with hash -430747632, now seen corresponding path program 11 times [2021-12-06 20:43:24,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:24,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364357827] [2021-12-06 20:43:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:24,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:24,479 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:43:24,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645494152] [2021-12-06 20:43:24,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:43:24,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:43:24,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:24,481 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:43:24,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 20:43:24,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-12-06 20:43:24,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:43:24,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 20:43:24,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 176 proven. 1288 refuted. 8 times theorem prover too weak. 3800 trivial. 0 not checked. [2021-12-06 20:43:37,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 376 proven. 1096 refuted. 0 times theorem prover too weak. 3800 trivial. 0 not checked. [2021-12-06 20:43:40,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:40,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364357827] [2021-12-06 20:43:40,949 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:43:40,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645494152] [2021-12-06 20:43:40,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645494152] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:43:40,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:43:40,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-12-06 20:43:40,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795405944] [2021-12-06 20:43:40,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:43:40,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 20:43:40,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:40,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 20:43:40,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1157, Unknown=6, NotChecked=0, Total=1332 [2021-12-06 20:43:40,952 INFO L87 Difference]: Start difference. First operand 20555 states and 28016 transitions. Second operand has 37 states, 37 states have (on average 7.216216216216216) internal successors, (267), 37 states have internal predecessors, (267), 37 states have call successors, (84), 2 states have call predecessors, (84), 1 states have return successors, (83), 36 states have call predecessors, (83), 36 states have call successors, (83) [2021-12-06 20:48:52,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:48:52,327 INFO L93 Difference]: Finished difference Result 32773 states and 44573 transitions. [2021-12-06 20:48:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-12-06 20:48:52,329 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 7.216216216216216) internal successors, (267), 37 states have internal predecessors, (267), 37 states have call successors, (84), 2 states have call predecessors, (84), 1 states have return successors, (83), 36 states have call predecessors, (83), 36 states have call successors, (83) Word has length 375 [2021-12-06 20:48:52,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:48:52,379 INFO L225 Difference]: With dead ends: 32773 [2021-12-06 20:48:52,379 INFO L226 Difference]: Without dead ends: 29051 [2021-12-06 20:48:52,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 718 SyntacticMatches, 15 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 317.1s TimeCoverageRelationStatistics Valid=1915, Invalid=12740, Unknown=107, NotChecked=0, Total=14762 [2021-12-06 20:48:52,390 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 712 mSDsluCounter, 5813 mSDsCounter, 0 mSdLazyCounter, 3142 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 6357 SdHoareTripleChecker+Invalid, 6095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 3142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2640 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:48:52,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 6357 Invalid, 6095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 3142 Invalid, 0 Unknown, 2640 Unchecked, 3.3s Time] [2021-12-06 20:48:52,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29051 states. [2021-12-06 20:48:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29051 to 24924. [2021-12-06 20:48:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24924 states, 18736 states have (on average 1.1506725021349273) internal successors, (21559), 18910 states have internal predecessors, (21559), 6139 states have call successors, (6139), 49 states have call predecessors, (6139), 48 states have return successors, (6138), 5964 states have call predecessors, (6138), 6138 states have call successors, (6138) [2021-12-06 20:48:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24924 states to 24924 states and 33836 transitions. [2021-12-06 20:48:55,362 INFO L78 Accepts]: Start accepts. Automaton has 24924 states and 33836 transitions. Word has length 375 [2021-12-06 20:48:55,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:48:55,363 INFO L470 AbstractCegarLoop]: Abstraction has 24924 states and 33836 transitions. [2021-12-06 20:48:55,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 7.216216216216216) internal successors, (267), 37 states have internal predecessors, (267), 37 states have call successors, (84), 2 states have call predecessors, (84), 1 states have return successors, (83), 36 states have call predecessors, (83), 36 states have call successors, (83) [2021-12-06 20:48:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 24924 states and 33836 transitions. [2021-12-06 20:48:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2021-12-06 20:48:55,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:48:55,402 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:48:55,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 20:48:55,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:55,604 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:48:55,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:48:55,605 INFO L85 PathProgramCache]: Analyzing trace with hash -242961392, now seen corresponding path program 12 times [2021-12-06 20:48:55,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:48:55,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080254172] [2021-12-06 20:48:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:48:55,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:48:55,640 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:48:55,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590086066] [2021-12-06 20:48:55,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:48:55,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:48:55,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:48:55,642 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:48:55,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 20:49:27,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-12-06 20:49:27,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:49:27,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-06 20:49:27,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:50:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 1162 proven. 1241 refuted. 0 times theorem prover too weak. 2869 trivial. 0 not checked. [2021-12-06 20:50:37,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:50:49,401 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~v~0#1_158| Int)) (let ((.cse0 (div (+ (* |v_ULTIMATE.start_main_~v~0#1_158| |v_ULTIMATE.start_main_~v~0#1_158|) (* (- 6) |c_ULTIMATE.start_main_~u~0#1|) (* 6 |v_ULTIMATE.start_main_~v~0#1_158|) (* (- 1) |c_ULTIMATE.start_main_~u~0#1| |c_ULTIMATE.start_main_~u~0#1|)) (- 4)))) (or (<= (+ 2 |c_ULTIMATE.start_main_~r~0#1|) |v_ULTIMATE.start_main_~v~0#1_158|) (<= .cse0 |c_ULTIMATE.start_main_~A~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~u~0#1| 2) (* |v_ULTIMATE.start_main_~v~0#1_158| 2) (let ((.cse1 (+ |v_ULTIMATE.start_main_~v~0#1_158| 2))) (* (- 1) .cse1 .cse1)) (let ((.cse2 (+ 2 |c_ULTIMATE.start_main_~u~0#1|))) (* .cse2 .cse2))) 4) 0)) (<= (+ |v_ULTIMATE.start_main_~v~0#1_158| |c_ULTIMATE.start_main_~A~0#1| 4) .cse0) (< (+ |c_ULTIMATE.start_main_~A~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~u~0#1|) (+ (div (+ (* (- 1) |v_ULTIMATE.start_main_~v~0#1_158| |v_ULTIMATE.start_main_~v~0#1_158|) (* |c_ULTIMATE.start_main_~u~0#1| |c_ULTIMATE.start_main_~u~0#1|) (* (- 6) |v_ULTIMATE.start_main_~v~0#1_158|) (* 2 |c_ULTIMATE.start_main_~u~0#1|) (- 8)) 4) (* 3 |v_ULTIMATE.start_main_~v~0#1_158|)))))) is different from false [2021-12-06 20:50:49,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:50:49,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080254172] [2021-12-06 20:50:49,671 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:50:49,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590086066] [2021-12-06 20:50:49,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590086066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:50:49,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:50:49,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-12-06 20:50:49,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188443649] [2021-12-06 20:50:49,671 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 20:50:49,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 20:50:49,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:50:49,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 20:50:49,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1151, Unknown=6, NotChecked=70, Total=1406 [2021-12-06 20:50:49,672 INFO L87 Difference]: Start difference. First operand 24924 states and 33836 transitions. Second operand has 28 states, 28 states have (on average 5.392857142857143) internal successors, (151), 25 states have internal predecessors, (151), 21 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (44), 23 states have call predecessors, (44), 21 states have call successors, (44) [2021-12-06 20:50:50,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:50:52,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:50:54,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:50:56,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:50:59,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:01,833 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:04,860 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:05,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:08,055 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:10,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:11,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:13,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:17,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:19,315 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:21,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:22,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:30,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:31,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:33,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:34,261 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:35,376 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:36,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:40,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:41,850 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:44,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:46,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:47,836 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:49,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:51,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:51:54,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:01,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:03,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:06,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:09,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:11,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:13,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:18,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:24,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:29,269 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:37,111 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:43,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:44,941 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:48,475 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:52,144 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:55,834 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:57,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:52:58,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:53:01,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:53:06,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:53:09,275 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:53:12,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:53:16,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:53:27,827 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:53:33,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:53:35,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:53:38,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:53:40,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:53:42,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:53:43,993 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:53:54,980 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:00,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:01,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:09,142 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:11,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:13,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:17,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:21,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:23,971 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:26,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:29,119 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:30,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:34,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:35,721 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:37,727 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:38,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:54:39,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:39,897 INFO L93 Difference]: Finished difference Result 30411 states and 41264 transitions. [2021-12-06 20:54:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 20:54:39,899 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.392857142857143) internal successors, (151), 25 states have internal predecessors, (151), 21 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (44), 23 states have call predecessors, (44), 21 states have call successors, (44) Word has length 375 [2021-12-06 20:54:39,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:39,946 INFO L225 Difference]: With dead ends: 30411 [2021-12-06 20:54:39,946 INFO L226 Difference]: Without dead ends: 29488 [2021-12-06 20:54:39,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 477 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 60.4s TimeCoverageRelationStatistics Valid=238, Invalid=1652, Unknown=6, NotChecked=84, Total=1980 [2021-12-06 20:54:39,954 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 211 mSDsluCounter, 3392 mSDsCounter, 0 mSdLazyCounter, 2886 mSolverCounterSat, 125 mSolverCounterUnsat, 28 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 221.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 3609 SdHoareTripleChecker+Invalid, 3039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2886 IncrementalHoareTripleChecker+Invalid, 28 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 223.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:39,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 3609 Invalid, 3039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2886 Invalid, 28 Unknown, 0 Unchecked, 223.1s Time] [2021-12-06 20:54:39,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29488 states. [2021-12-06 20:54:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29488 to 26250. [2021-12-06 20:54:43,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26250 states, 19735 states have (on average 1.1504940461109703) internal successors, (22705), 19923 states have internal predecessors, (22705), 6466 states have call successors, (6466), 49 states have call predecessors, (6466), 48 states have return successors, (6465), 6277 states have call predecessors, (6465), 6465 states have call successors, (6465) [2021-12-06 20:54:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26250 states to 26250 states and 35636 transitions. [2021-12-06 20:54:43,312 INFO L78 Accepts]: Start accepts. Automaton has 26250 states and 35636 transitions. Word has length 375 [2021-12-06 20:54:43,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:43,313 INFO L470 AbstractCegarLoop]: Abstraction has 26250 states and 35636 transitions. [2021-12-06 20:54:43,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.392857142857143) internal successors, (151), 25 states have internal predecessors, (151), 21 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (44), 23 states have call predecessors, (44), 21 states have call successors, (44) [2021-12-06 20:54:43,313 INFO L276 IsEmpty]: Start isEmpty. Operand 26250 states and 35636 transitions. [2021-12-06 20:54:43,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2021-12-06 20:54:43,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:43,355 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:43,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 20:54:43,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 20:54:43,556 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:43,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1020100592, now seen corresponding path program 13 times [2021-12-06 20:54:43,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:54:43,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765625030] [2021-12-06 20:54:43,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:43,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:54:43,592 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:54:43,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31783286] [2021-12-06 20:54:43,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:54:43,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:54:43,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:54:43,595 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:54:43,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 20:54:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:43,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 20:54:43,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:56:23,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-12-06 20:56:23,556 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-06 20:56:23,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:56:23,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765625030] [2021-12-06 20:56:23,556 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:56:23,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31783286] [2021-12-06 20:56:23,556 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-12-06 20:56:23,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:56:23,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-06 20:56:23,556 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-12-06 20:56:23,557 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-06 20:56:23,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 20:56:23,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 20:56:23,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 20:56:23,775 INFO L732 BasicCegarLoop]: Path program histogram: [13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:56:23,781 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 20:56:23,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 08:56:23 BoogieIcfgContainer [2021-12-06 20:56:23,835 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 20:56:23,836 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 20:56:23,836 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 20:56:23,836 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 20:56:23,836 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:42:15" (3/4) ... [2021-12-06 20:56:23,838 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-06 20:56:23,838 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 20:56:23,839 INFO L158 Benchmark]: Toolchain (without parser) took 848717.62ms. Allocated memory was 117.4MB in the beginning and 1.9GB in the end (delta: 1.8GB). Free memory was 81.2MB in the beginning and 435.8MB in the end (delta: -354.6MB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. [2021-12-06 20:56:23,839 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 97.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 20:56:23,839 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.91ms. Allocated memory is still 117.4MB. Free memory was 81.0MB in the beginning and 93.5MB in the end (delta: -12.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 20:56:23,839 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.15ms. Allocated memory is still 117.4MB. Free memory was 93.5MB in the beginning and 91.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 20:56:23,839 INFO L158 Benchmark]: Boogie Preprocessor took 16.02ms. Allocated memory is still 117.4MB. Free memory was 91.9MB in the beginning and 90.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 20:56:23,839 INFO L158 Benchmark]: RCFGBuilder took 215.38ms. Allocated memory is still 117.4MB. Free memory was 90.9MB in the beginning and 80.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 20:56:23,839 INFO L158 Benchmark]: TraceAbstraction took 848261.21ms. Allocated memory was 117.4MB in the beginning and 1.9GB in the end (delta: 1.8GB). Free memory was 79.9MB in the beginning and 435.8MB in the end (delta: -355.9MB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. [2021-12-06 20:56:23,840 INFO L158 Benchmark]: Witness Printer took 2.45ms. Allocated memory is still 1.9GB. Free memory is still 435.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 20:56:23,840 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 97.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 192.91ms. Allocated memory is still 117.4MB. Free memory was 81.0MB in the beginning and 93.5MB in the end (delta: -12.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.15ms. Allocated memory is still 117.4MB. Free memory was 93.5MB in the beginning and 91.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.02ms. Allocated memory is still 117.4MB. Free memory was 91.9MB in the beginning and 90.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 215.38ms. Allocated memory is still 117.4MB. Free memory was 90.9MB in the beginning and 80.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 848261.21ms. Allocated memory was 117.4MB in the beginning and 1.9GB in the end (delta: 1.8GB). Free memory was 79.9MB in the beginning and 435.8MB in the end (delta: -355.9MB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. * Witness Printer took 2.45ms. Allocated memory is still 1.9GB. Free memory is still 435.8MB. 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: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int counter = 0; [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L27] CALL assume_abort_if_not(A % 2 == 1) [L9] COND FALSE !(!cond) [L27] RET assume_abort_if_not(A % 2 == 1) [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<50 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<50 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND FALSE !(counter++<50) [L47] EXPR counter++ [L47] COND FALSE !(counter++<50) [L34] EXPR counter++ [L34] COND FALSE !(counter++<50) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 848.2s, OverallIterations: 27, TraceHistogramMax: 45, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.3s, AutomataDifference: 580.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 30 mSolverCounterUnknown, 9227 SdHoareTripleChecker+Valid, 243.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9166 mSDsluCounter, 28449 SdHoareTripleChecker+Invalid, 240.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3078 IncrementalHoareTripleChecker+Unchecked, 25012 mSDsCounter, 5993 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16968 IncrementalHoareTripleChecker+Invalid, 26069 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5993 mSolverCounterUnsat, 3437 mSDtfsCounter, 16968 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6597 GetRequests, 5681 SyntacticMatches, 18 SemanticMatches, 898 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 14265 ImplicationChecksByTransitivity, 389.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31571occurred in iteration=21, InterpolantAutomatonStates: 850, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 17.4s AutomataMinimizationTime, 26 MinimizatonAttempts, 16632 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 36.5s SatisfiabilityAnalysisTime, 206.7s InterpolantComputationTime, 3852 NumberOfCodeBlocks, 3620 NumberOfCodeBlocksAsserted, 120 NumberOfCheckSat, 5863 ConstructedInterpolants, 64 QuantifiedInterpolants, 31797 SizeOfPredicates, 133 NumberOfNonLiveVariables, 8381 ConjunctsInSsa, 510 ConjunctsInUnsatCore, 43 InterpolantComputations, 9 PerfectInterpolantSequences, 33209/45260 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 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_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/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_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/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_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/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 ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:56:25,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:56:25,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:56:25,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:56:25,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:56:25,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:56:25,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:56:25,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:56:25,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:56:25,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:56:25,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:56:25,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:56:25,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:56:25,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:56:25,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:56:25,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:56:25,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:56:25,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:56:25,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:56:25,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:56:25,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:56:25,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:56:25,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:56:25,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:56:25,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:56:25,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:56:25,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:56:25,269 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:56:25,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:56:25,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:56:25,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:56:25,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:56:25,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:56:25,272 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:56:25,273 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:56:25,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:56:25,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:56:25,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:56:25,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:56:25,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:56:25,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:56:25,276 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-06 20:56:25,293 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:56:25,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:56:25,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:56:25,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:56:25,294 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:56:25,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:56:25,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:56:25,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:56:25,295 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:56:25,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:56:25,295 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:56:25,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:56:25,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:56:25,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:56:25,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:56:25,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:56:25,296 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 20:56:25,296 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 20:56:25,296 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 20:56:25,296 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:56:25,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:56:25,297 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:56:25,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:56:25,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:56:25,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:56:25,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:56:25,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:56:25,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:56:25,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:56:25,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:56:25,298 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 20:56:25,298 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 20:56:25,298 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:56:25,298 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:56:25,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:56:25,298 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:56:25,298 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 20:56:25,298 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_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d [2021-12-06 20:56:25,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:56:25,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:56:25,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:56:25,547 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:56:25,547 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:56:25,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2021-12-06 20:56:25,593 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/data/5f09ac0b3/4994592c62eb49aa9928dc3e13d8e1e3/FLAG364e8ff09 [2021-12-06 20:56:25,964 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:56:25,965 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2021-12-06 20:56:25,970 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/data/5f09ac0b3/4994592c62eb49aa9928dc3e13d8e1e3/FLAG364e8ff09 [2021-12-06 20:56:25,980 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/data/5f09ac0b3/4994592c62eb49aa9928dc3e13d8e1e3 [2021-12-06 20:56:25,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:56:25,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:56:25,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:56:25,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:56:25,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:56:25,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:56:25" (1/1) ... [2021-12-06 20:56:25,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f610cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:56:25, skipping insertion in model container [2021-12-06 20:56:25,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:56:25" (1/1) ... [2021-12-06 20:56:25,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:56:26,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:56:26,113 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_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c[535,548] [2021-12-06 20:56:26,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:56:26,142 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:56:26,159 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_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c[535,548] [2021-12-06 20:56:26,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:56:26,188 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:56:26,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:56:26 WrapperNode [2021-12-06 20:56:26,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:56:26,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:56:26,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:56:26,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:56:26,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:56:26" (1/1) ... [2021-12-06 20:56:26,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:56:26" (1/1) ... [2021-12-06 20:56:26,219 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2021-12-06 20:56:26,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:56:26,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:56:26,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:56:26,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:56:26,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:56:26" (1/1) ... [2021-12-06 20:56:26,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:56:26" (1/1) ... [2021-12-06 20:56:26,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:56:26" (1/1) ... [2021-12-06 20:56:26,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:56:26" (1/1) ... [2021-12-06 20:56:26,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:56:26" (1/1) ... [2021-12-06 20:56:26,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:56:26" (1/1) ... [2021-12-06 20:56:26,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:56:26" (1/1) ... [2021-12-06 20:56:26,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:56:26,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:56:26,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:56:26,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:56:26,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:56:26" (1/1) ... [2021-12-06 20:56:26,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:56:26,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:56:26,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:56:26,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:56:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:56:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 20:56:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 20:56:26,297 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 20:56:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:56:26,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:56:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 20:56:26,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 20:56:26,347 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:56:26,349 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:56:26,487 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:56:26,492 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:56:26,493 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 20:56:26,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:56:26 BoogieIcfgContainer [2021-12-06 20:56:26,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:56:26,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:56:26,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:56:26,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:56:26,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:56:25" (1/3) ... [2021-12-06 20:56:26,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9513021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:56:26, skipping insertion in model container [2021-12-06 20:56:26,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:56:26" (2/3) ... [2021-12-06 20:56:26,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9513021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:56:26, skipping insertion in model container [2021-12-06 20:56:26,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:56:26" (3/3) ... [2021-12-06 20:56:26,500 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound50.c [2021-12-06 20:56:26,504 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:56:26,504 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:56:26,544 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:56:26,550 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 20:56:26,550 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:56:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 20:56:26,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 20:56:26,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:56:26,567 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:56:26,568 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:56:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:56:26,572 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2021-12-06 20:56:26,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:56:26,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359807067] [2021-12-06 20:56:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:56:26,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:56:26,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:56:26,583 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:56:26,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 20:56:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:56:26,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 20:56:26,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:56:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:56:26,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:56:26,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:56:26,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359807067] [2021-12-06 20:56:26,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359807067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:56:26,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:56:26,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:56:26,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305200313] [2021-12-06 20:56:26,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:56:26,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 20:56:26,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:56:26,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 20:56:26,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:56:26,841 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:56:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:56:26,858 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2021-12-06 20:56:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 20:56:26,859 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-12-06 20:56:26,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:56:26,865 INFO L225 Difference]: With dead ends: 61 [2021-12-06 20:56:26,865 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 20:56:26,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 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 20:56:26,871 INFO L933 BasicCegarLoop]: 41 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, 41 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 20:56:26,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:56:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 20:56:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-06 20:56:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 20:56:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2021-12-06 20:56:26,900 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2021-12-06 20:56:26,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:56:26,901 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2021-12-06 20:56:26,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:56:26,901 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2021-12-06 20:56:26,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 20:56:26,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:56:26,903 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:56:26,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:56:27,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:56:27,106 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:56:27,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:56:27,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2021-12-06 20:56:27,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:56:27,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461694028] [2021-12-06 20:56:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:56:27,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:56:27,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:56:27,117 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:56:27,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 20:56:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:56:27,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:56:27,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:56:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:56:27,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:56:27,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:56:27,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461694028] [2021-12-06 20:56:27,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461694028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:56:27,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:56:27,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:56:27,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725274199] [2021-12-06 20:56:27,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:56:27,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:56:27,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:56:27,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:56:27,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:56:27,358 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:56:27,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:56:27,379 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-12-06 20:56:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:56:27,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-06 20:56:27,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:56:27,380 INFO L225 Difference]: With dead ends: 37 [2021-12-06 20:56:27,380 INFO L226 Difference]: Without dead ends: 30 [2021-12-06 20:56:27,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:56:27,382 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:56:27,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:56:27,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-06 20:56:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-06 20:56:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 20:56:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-12-06 20:56:27,389 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2021-12-06 20:56:27,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:56:27,390 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-12-06 20:56:27,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:56:27,390 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-12-06 20:56:27,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 20:56:27,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:56:27,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:56:27,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 20:56:27,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:56:27,592 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:56:27,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:56:27,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2021-12-06 20:56:27,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:56:27,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927277882] [2021-12-06 20:56:27,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:56:27,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:56:27,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:56:27,596 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:56:27,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3122deaa-8d28-4ce0-ba97-78abb6cb63b6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process