./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:24:00,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:24:00,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:24:00,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:24:00,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:24:00,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:24:00,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:24:00,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:24:00,274 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:24:00,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:24:00,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:24:00,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:24:00,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:24:00,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:24:00,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:24:00,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:24:00,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:24:00,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:24:00,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:24:00,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:24:00,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:24:00,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:24:00,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:24:00,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:24:00,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:24:00,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:24:00,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:24:00,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:24:00,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:24:00,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:24:00,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:24:00,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:24:00,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:24:00,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:24:00,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:24:00,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:24:00,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:24:00,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:24:00,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:24:00,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:24:00,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:24:00,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:24:00,410 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:24:00,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:24:00,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:24:00,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:24:00,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:24:00,413 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:24:00,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:24:00,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:24:00,414 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:24:00,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:24:00,415 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:24:00,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:24:00,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:24:00,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:24:00,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:24:00,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:24:00,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:24:00,417 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:24:00,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:24:00,417 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:24:00,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:24:00,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:24:00,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:24:00,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:24:00,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:24:00,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:24:00,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:24:00,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:24:00,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:24:00,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:24:00,421 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:24:00,421 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:24:00,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:24:00,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:24:00,422 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_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 [2021-11-19 04:24:00,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:24:00,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:24:00,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:24:00,788 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:24:00,788 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:24:00,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-examples/standard_sentinel-2.i [2021-11-19 04:24:00,863 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/data/9ff5a8edf/b860f9acf44947ddb1fb3ba1e6425c6b/FLAG1e7d68397 [2021-11-19 04:24:01,459 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:24:01,460 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/sv-benchmarks/c/array-examples/standard_sentinel-2.i [2021-11-19 04:24:01,472 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/data/9ff5a8edf/b860f9acf44947ddb1fb3ba1e6425c6b/FLAG1e7d68397 [2021-11-19 04:24:01,789 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/data/9ff5a8edf/b860f9acf44947ddb1fb3ba1e6425c6b [2021-11-19 04:24:01,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:24:01,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:24:01,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:24:01,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:24:01,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:24:01,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:24:01" (1/1) ... [2021-11-19 04:24:01,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73dc7ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:01, skipping insertion in model container [2021-11-19 04:24:01,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:24:01" (1/1) ... [2021-11-19 04:24:01,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:24:01,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:24:02,006 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_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/sv-benchmarks/c/array-examples/standard_sentinel-2.i[852,865] [2021-11-19 04:24:02,019 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:24:02,027 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:24:02,040 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_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/sv-benchmarks/c/array-examples/standard_sentinel-2.i[852,865] [2021-11-19 04:24:02,046 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:24:02,059 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:24:02,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:02 WrapperNode [2021-11-19 04:24:02,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:24:02,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:24:02,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:24:02,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:24:02,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:02" (1/1) ... [2021-11-19 04:24:02,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:02" (1/1) ... [2021-11-19 04:24:02,094 INFO L137 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2021-11-19 04:24:02,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:24:02,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:24:02,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:24:02,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:24:02,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:02" (1/1) ... [2021-11-19 04:24:02,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:02" (1/1) ... [2021-11-19 04:24:02,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:02" (1/1) ... [2021-11-19 04:24:02,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:02" (1/1) ... [2021-11-19 04:24:02,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:02" (1/1) ... [2021-11-19 04:24:02,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:02" (1/1) ... [2021-11-19 04:24:02,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:02" (1/1) ... [2021-11-19 04:24:02,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:24:02,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:24:02,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:24:02,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:24:02,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:02" (1/1) ... [2021-11-19 04:24:02,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:24:02,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:02,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:24:02,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:24:02,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:24:02,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:24:02,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:24:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:24:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:24:02,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:24:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:24:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:24:02,300 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:24:02,302 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:24:02,484 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:24:02,490 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:24:02,490 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 04:24:02,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:24:02 BoogieIcfgContainer [2021-11-19 04:24:02,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:24:02,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:24:02,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:24:02,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:24:02,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:24:01" (1/3) ... [2021-11-19 04:24:02,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796e4fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:24:02, skipping insertion in model container [2021-11-19 04:24:02,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:02" (2/3) ... [2021-11-19 04:24:02,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796e4fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:24:02, skipping insertion in model container [2021-11-19 04:24:02,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:24:02" (3/3) ... [2021-11-19 04:24:02,505 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2021-11-19 04:24:02,511 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:24:02,518 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:24:02,634 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:24:02,645 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:24:02,645 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:24:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:02,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 04:24:02,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:02,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:02,686 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:02,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:02,697 INFO L85 PathProgramCache]: Analyzing trace with hash 214135089, now seen corresponding path program 1 times [2021-11-19 04:24:02,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:02,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897702773] [2021-11-19 04:24:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:02,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:24:02,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:02,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897702773] [2021-11-19 04:24:02,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897702773] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:02,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:02,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:24:02,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290584288] [2021-11-19 04:24:02,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:02,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:24:02,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:02,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:24:02,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:02,965 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:03,004 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-11-19 04:24:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:24:03,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-19 04:24:03,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:03,016 INFO L225 Difference]: With dead ends: 30 [2021-11-19 04:24:03,016 INFO L226 Difference]: Without dead ends: 13 [2021-11-19 04:24:03,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:03,025 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:03,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:24:03,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-19 04:24:03,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-19 04:24:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-19 04:24:03,066 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-11-19 04:24:03,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:03,067 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-19 04:24:03,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:03,069 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-19 04:24:03,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 04:24:03,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:03,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:03,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:24:03,072 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:03,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:03,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1622702096, now seen corresponding path program 1 times [2021-11-19 04:24:03,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:03,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681383306] [2021-11-19 04:24:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:03,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:24:03,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:03,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681383306] [2021-11-19 04:24:03,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681383306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:03,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679502990] [2021-11-19 04:24:03,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:03,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:03,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:03,170 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:03,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:24:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:03,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:24:03,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:24:03,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:24:03,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679502990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:03,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:24:03,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-19 04:24:03,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913416216] [2021-11-19 04:24:03,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:03,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:24:03,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:03,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:24:03,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:24:03,339 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:03,369 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-11-19 04:24:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:24:03,370 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-19 04:24:03,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:03,371 INFO L225 Difference]: With dead ends: 25 [2021-11-19 04:24:03,371 INFO L226 Difference]: Without dead ends: 18 [2021-11-19 04:24:03,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:24:03,374 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:03,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:24:03,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-19 04:24:03,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-19 04:24:03,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:03,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-19 04:24:03,380 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2021-11-19 04:24:03,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:03,380 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-19 04:24:03,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-19 04:24:03,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 04:24:03,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:03,382 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:03,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:03,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:03,607 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:03,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:03,608 INFO L85 PathProgramCache]: Analyzing trace with hash 49509066, now seen corresponding path program 2 times [2021-11-19 04:24:03,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:03,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087418595] [2021-11-19 04:24:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:03,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 04:24:03,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:03,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087418595] [2021-11-19 04:24:03,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087418595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:03,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:03,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:24:03,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380706819] [2021-11-19 04:24:03,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:03,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:24:03,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:03,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:24:03,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:24:03,717 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:03,741 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-11-19 04:24:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:24:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-19 04:24:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:03,743 INFO L225 Difference]: With dead ends: 24 [2021-11-19 04:24:03,743 INFO L226 Difference]: Without dead ends: 20 [2021-11-19 04:24:03,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:24:03,746 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:03,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:24:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-19 04:24:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-19 04:24:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-19 04:24:03,754 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2021-11-19 04:24:03,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:03,755 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-19 04:24:03,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-19 04:24:03,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 04:24:03,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:03,756 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:03,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:24:03,757 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:03,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:03,758 INFO L85 PathProgramCache]: Analyzing trace with hash 382246981, now seen corresponding path program 1 times [2021-11-19 04:24:03,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:03,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572988294] [2021-11-19 04:24:03,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:03,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:24:03,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:03,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572988294] [2021-11-19 04:24:03,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572988294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:03,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63706567] [2021-11-19 04:24:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:03,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:03,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:03,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:03,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:24:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:03,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:24:03,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:24:04,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:24:04,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63706567] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:04,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:24:04,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-19 04:24:04,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264135487] [2021-11-19 04:24:04,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:04,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:24:04,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:04,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:24:04,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:24:04,225 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:04,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:04,285 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-19 04:24:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:24:04,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-19 04:24:04,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:04,287 INFO L225 Difference]: With dead ends: 41 [2021-11-19 04:24:04,287 INFO L226 Difference]: Without dead ends: 32 [2021-11-19 04:24:04,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:24:04,290 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:04,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:24:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-19 04:24:04,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-19 04:24:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-11-19 04:24:04,298 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 19 [2021-11-19 04:24:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:04,298 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-11-19 04:24:04,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:04,299 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-11-19 04:24:04,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 04:24:04,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:04,300 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:04,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:04,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:04,527 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:04,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:04,527 INFO L85 PathProgramCache]: Analyzing trace with hash 822799929, now seen corresponding path program 2 times [2021-11-19 04:24:04,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:04,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414488342] [2021-11-19 04:24:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:04,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:24:04,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:04,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414488342] [2021-11-19 04:24:04,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414488342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:04,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792715992] [2021-11-19 04:24:04,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:24:04,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:04,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:04,809 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:04,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:24:04,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:24:04,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:24:04,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 04:24:04,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:24:05,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:24:05,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792715992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:05,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:24:05,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-19 04:24:05,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993651501] [2021-11-19 04:24:05,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:05,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 04:24:05,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:05,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 04:24:05,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:24:05,336 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:05,445 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2021-11-19 04:24:05,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 04:24:05,446 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-19 04:24:05,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:05,451 INFO L225 Difference]: With dead ends: 65 [2021-11-19 04:24:05,451 INFO L226 Difference]: Without dead ends: 56 [2021-11-19 04:24:05,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:24:05,453 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:05,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:24:05,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-19 04:24:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-19 04:24:05,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-11-19 04:24:05,466 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 31 [2021-11-19 04:24:05,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:05,467 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-11-19 04:24:05,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-11-19 04:24:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 04:24:05,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:05,473 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:05,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:05,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:05,691 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:05,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:05,692 INFO L85 PathProgramCache]: Analyzing trace with hash 798531617, now seen corresponding path program 3 times [2021-11-19 04:24:05,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:05,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97135245] [2021-11-19 04:24:05,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:05,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:24:06,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:06,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97135245] [2021-11-19 04:24:06,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97135245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:06,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830486419] [2021-11-19 04:24:06,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:24:06,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:06,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:06,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:06,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:24:06,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 04:24:06,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:24:06,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 04:24:06,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:06,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-19 04:24:06,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:24:06,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-11-19 04:24:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-19 04:24:06,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-19 04:24:06,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830486419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:06,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:24:06,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 32 [2021-11-19 04:24:06,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546856042] [2021-11-19 04:24:06,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:06,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-19 04:24:06,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:06,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-19 04:24:06,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2021-11-19 04:24:06,724 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:06,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:06,999 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-11-19 04:24:07,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 04:24:07,000 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-19 04:24:07,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:07,002 INFO L225 Difference]: With dead ends: 76 [2021-11-19 04:24:07,002 INFO L226 Difference]: Without dead ends: 63 [2021-11-19 04:24:07,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 04:24:07,004 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:07,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:24:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-19 04:24:07,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-11-19 04:24:07,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-11-19 04:24:07,015 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 55 [2021-11-19 04:24:07,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:07,016 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-11-19 04:24:07,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:07,016 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-11-19 04:24:07,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:24:07,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:07,018 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:07,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:07,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-19 04:24:07,231 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:07,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:07,231 INFO L85 PathProgramCache]: Analyzing trace with hash 498607765, now seen corresponding path program 4 times [2021-11-19 04:24:07,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:07,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316831650] [2021-11-19 04:24:07,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:07,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:24:07,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:07,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316831650] [2021-11-19 04:24:07,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316831650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:07,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044752190] [2021-11-19 04:24:07,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:24:07,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:07,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:07,667 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:07,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:24:07,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:24:07,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:24:07,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 04:24:07,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:24:07,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:24:08,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044752190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:08,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:24:08,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2021-11-19 04:24:08,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022959204] [2021-11-19 04:24:08,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:08,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-19 04:24:08,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:08,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-19 04:24:08,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 04:24:08,834 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:09,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:09,001 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2021-11-19 04:24:09,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-19 04:24:09,007 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-19 04:24:09,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:09,013 INFO L225 Difference]: With dead ends: 125 [2021-11-19 04:24:09,014 INFO L226 Difference]: Without dead ends: 112 [2021-11-19 04:24:09,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 04:24:09,019 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:09,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 26 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:24:09,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-19 04:24:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-11-19 04:24:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2021-11-19 04:24:09,038 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 61 [2021-11-19 04:24:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:09,039 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2021-11-19 04:24:09,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:09,039 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2021-11-19 04:24:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 04:24:09,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:09,041 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:09,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:09,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-19 04:24:09,263 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:09,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:09,264 INFO L85 PathProgramCache]: Analyzing trace with hash -804209501, now seen corresponding path program 5 times [2021-11-19 04:24:09,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:09,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487842780] [2021-11-19 04:24:09,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:09,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:24:10,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:10,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487842780] [2021-11-19 04:24:10,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487842780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:10,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395518320] [2021-11-19 04:24:10,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:24:10,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:10,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:10,487 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:10,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:24:25,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-11-19 04:24:25,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:24:25,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-19 04:24:25,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:24:26,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:24:29,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395518320] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:29,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:24:29,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2021-11-19 04:24:29,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306283178] [2021-11-19 04:24:29,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:29,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-19 04:24:29,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:29,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-19 04:24:29,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-11-19 04:24:29,026 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:29,425 INFO L93 Difference]: Finished difference Result 225 states and 276 transitions. [2021-11-19 04:24:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-19 04:24:29,426 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-19 04:24:29,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:29,434 INFO L225 Difference]: With dead ends: 225 [2021-11-19 04:24:29,435 INFO L226 Difference]: Without dead ends: 212 [2021-11-19 04:24:29,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-11-19 04:24:29,440 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 147 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:29,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 50 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:24:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-19 04:24:29,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-11-19 04:24:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2021-11-19 04:24:29,490 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 111 [2021-11-19 04:24:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:29,490 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2021-11-19 04:24:29,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2021-11-19 04:24:29,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-19 04:24:29,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:29,495 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:29,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:29,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:29,696 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:29,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1800984001, now seen corresponding path program 6 times [2021-11-19 04:24:29,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:29,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001779143] [2021-11-19 04:24:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:29,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:24:33,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:33,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001779143] [2021-11-19 04:24:33,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001779143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:33,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797580397] [2021-11-19 04:24:33,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:24:33,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:33,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:33,414 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:33,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:24:33,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-19 04:24:33,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:24:33,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 04:24:33,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:33,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-19 04:24:34,268 INFO L354 Elim1Store]: treesize reduction 34, result has 57.0 percent of original size [2021-11-19 04:24:34,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 59 [2021-11-19 04:24:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2021-11-19 04:24:34,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2021-11-19 04:24:35,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797580397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:35,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:24:35,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 10, 10] total 116 [2021-11-19 04:24:35,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290745053] [2021-11-19 04:24:35,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:35,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-19 04:24:35,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:35,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-19 04:24:35,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5114, Invalid=8226, Unknown=0, NotChecked=0, Total=13340 [2021-11-19 04:24:35,782 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 116 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:37,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:37,193 INFO L93 Difference]: Finished difference Result 238 states and 243 transitions. [2021-11-19 04:24:37,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-19 04:24:37,194 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 116 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-11-19 04:24:37,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:37,196 INFO L225 Difference]: With dead ends: 238 [2021-11-19 04:24:37,196 INFO L226 Difference]: Without dead ends: 221 [2021-11-19 04:24:37,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 406 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5176, Invalid=9830, Unknown=0, NotChecked=0, Total=15006 [2021-11-19 04:24:37,204 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 116 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:37,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 66 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 329 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2021-11-19 04:24:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-19 04:24:37,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2021-11-19 04:24:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0091324200913243) internal successors, (221), 219 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2021-11-19 04:24:37,250 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 211 [2021-11-19 04:24:37,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:37,250 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2021-11-19 04:24:37,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 116 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2021-11-19 04:24:37,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-19 04:24:37,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:37,261 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:37,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:37,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:37,475 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:37,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:37,475 INFO L85 PathProgramCache]: Analyzing trace with hash -43122706, now seen corresponding path program 7 times [2021-11-19 04:24:37,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:37,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767471617] [2021-11-19 04:24:37,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:37,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9843 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:24:41,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:41,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767471617] [2021-11-19 04:24:41,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767471617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:41,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370361015] [2021-11-19 04:24:41,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:24:41,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:41,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:41,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:41,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:24:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:41,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-19 04:24:41,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9843 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:24:42,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9843 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:24:52,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370361015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:52,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:24:52,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2021-11-19 04:24:52,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368681997] [2021-11-19 04:24:52,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:52,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-11-19 04:24:52,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:52,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-11-19 04:24:52,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-11-19 04:24:52,351 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:53,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:53,390 INFO L93 Difference]: Finished difference Result 441 states and 543 transitions. [2021-11-19 04:24:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-19 04:24:53,390 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2021-11-19 04:24:53,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:53,393 INFO L225 Difference]: With dead ends: 441 [2021-11-19 04:24:53,393 INFO L226 Difference]: Without dead ends: 422 [2021-11-19 04:24:53,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-11-19 04:24:53,397 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 300 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:53,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 34 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:24:53,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-19 04:24:53,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2021-11-19 04:24:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.004750593824228) internal successors, (423), 421 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 423 transitions. [2021-11-19 04:24:53,416 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 423 transitions. Word has length 219 [2021-11-19 04:24:53,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:53,417 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 423 transitions. [2021-11-19 04:24:53,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 423 transitions. [2021-11-19 04:24:53,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-11-19 04:24:53,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:53,426 INFO L514 BasicCegarLoop]: trace histogram [200, 200, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:53,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:53,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:53,651 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:53,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:53,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1310128924, now seen corresponding path program 8 times [2021-11-19 04:24:53,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:53,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095918601] [2021-11-19 04:24:53,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:53,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 40042 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:25:07,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:07,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095918601] [2021-11-19 04:25:07,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095918601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:07,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386660460] [2021-11-19 04:25:07,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:25:07,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:07,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:07,707 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:07,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:25:07,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:25:07,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:25:07,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 202 conjunts are in the unsatisfiable core [2021-11-19 04:25:07,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 40042 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:25:09,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 40042 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:25:48,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386660460] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:25:48,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:25:48,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2021-11-19 04:25:48,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596383881] [2021-11-19 04:25:48,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:48,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2021-11-19 04:25:48,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:48,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2021-11-19 04:25:48,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2021-11-19 04:25:48,717 INFO L87 Difference]: Start difference. First operand 422 states and 423 transitions. Second operand has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:53,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:53,264 INFO L93 Difference]: Finished difference Result 845 states and 1048 transitions. [2021-11-19 04:25:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2021-11-19 04:25:53,265 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 421 [2021-11-19 04:25:53,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:53,270 INFO L225 Difference]: With dead ends: 845 [2021-11-19 04:25:53,271 INFO L226 Difference]: Without dead ends: 826 [2021-11-19 04:25:53,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1043 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 51.9s TimeCoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2021-11-19 04:25:53,283 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 603 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:53,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 66 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:25:53,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-11-19 04:25:53,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2021-11-19 04:25:53,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 1.0024242424242424) internal successors, (827), 825 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:53,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 827 transitions. [2021-11-19 04:25:53,312 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 827 transitions. Word has length 421 [2021-11-19 04:25:53,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:53,313 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 827 transitions. [2021-11-19 04:25:53,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:53,314 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 827 transitions. [2021-11-19 04:25:53,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2021-11-19 04:25:53,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:53,346 INFO L514 BasicCegarLoop]: trace histogram [402, 402, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:53,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:53,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:53,569 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:53,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:53,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1528066992, now seen corresponding path program 9 times [2021-11-19 04:25:53,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:53,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494760328] [2021-11-19 04:25:53,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:53,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 161646 backedges. 0 proven. 161604 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:26:47,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:47,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494760328] [2021-11-19 04:26:47,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494760328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:26:47,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855684483] [2021-11-19 04:26:47,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:26:47,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:26:47,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:26:47,963 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:26:47,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 04:26:48,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-19 04:26:48,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:26:48,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-19 04:26:48,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:26:49,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-19 04:26:53,244 INFO L354 Elim1Store]: treesize reduction 236, result has 16.6 percent of original size [2021-11-19 04:26:53,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 73 [2021-11-19 04:26:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 161646 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2021-11-19 04:26:54,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:26:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 161646 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2021-11-19 04:26:58,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855684483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:26:58,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:26:58,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 16, 16] total 432 [2021-11-19 04:26:58,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79220788] [2021-11-19 04:26:58,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:26:58,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 432 states [2021-11-19 04:26:58,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:58,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 432 interpolants. [2021-11-19 04:26:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81979, Invalid=104213, Unknown=0, NotChecked=0, Total=186192 [2021-11-19 04:26:58,365 INFO L87 Difference]: Start difference. First operand 826 states and 827 transitions. Second operand has 432 states, 432 states have (on average 1.9699074074074074) internal successors, (851), 432 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:27:10,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:27:10,813 INFO L93 Difference]: Finished difference Result 876 states and 885 transitions. [2021-11-19 04:27:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 437 states. [2021-11-19 04:27:10,814 INFO L78 Accepts]: Start accepts. Automaton has has 432 states, 432 states have (on average 1.9699074074074074) internal successors, (851), 432 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 825 [2021-11-19 04:27:10,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:27:10,821 INFO L225 Difference]: With dead ends: 876 [2021-11-19 04:27:10,821 INFO L226 Difference]: Without dead ends: 843 [2021-11-19 04:27:10,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2073 GetRequests, 1622 SyntacticMatches, 1 SemanticMatches, 450 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11772 ImplicationChecksByTransitivity, 66.2s TimeCoverageRelationStatistics Valid=82330, Invalid=121522, Unknown=0, NotChecked=0, Total=203852 [2021-11-19 04:27:10,895 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 474 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:27:10,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 97 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 04:27:10,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-11-19 04:27:10,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 842. [2021-11-19 04:27:10,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.0023781212841856) internal successors, (843), 841 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:27:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 843 transitions. [2021-11-19 04:27:10,930 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 843 transitions. Word has length 825 [2021-11-19 04:27:10,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:27:10,931 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 843 transitions. [2021-11-19 04:27:10,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 432 states, 432 states have (on average 1.9699074074074074) internal successors, (851), 432 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:27:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 843 transitions. [2021-11-19 04:27:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 842 [2021-11-19 04:27:10,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:27:10,948 INFO L514 BasicCegarLoop]: trace histogram [403, 403, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:27:10,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:27:11,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 04:27:11,163 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:27:11,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:27:11,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1930920747, now seen corresponding path program 10 times [2021-11-19 04:27:11,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:27:11,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999457233] [2021-11-19 04:27:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:27:11,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:27:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:28:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 162591 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-19 04:28:06,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:28:06,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999457233] [2021-11-19 04:28:06,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999457233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:28:06,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473564975] [2021-11-19 04:28:06,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:28:06,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:28:06,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:28:06,348 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:28:06,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 04:28:06,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:28:06,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:28:06,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 2535 conjuncts, 405 conjunts are in the unsatisfiable core [2021-11-19 04:28:06,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:28:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 162591 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-19 04:28:08,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:30:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 162591 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-19 04:30:57,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473564975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:30:57,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:30:57,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [406, 406, 406] total 811 [2021-11-19 04:30:57,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544274008] [2021-11-19 04:30:57,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:30:57,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2021-11-19 04:30:57,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:30:57,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2021-11-19 04:30:57,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328455, Invalid=328455, Unknown=0, NotChecked=0, Total=656910 [2021-11-19 04:30:57,700 INFO L87 Difference]: Start difference. First operand 842 states and 843 transitions. Second operand has 811 states, 811 states have (on average 2.0061652281134403) internal successors, (1627), 811 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:31:37,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:31:37,163 INFO L93 Difference]: Finished difference Result 1685 states and 2091 transitions. [2021-11-19 04:31:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2021-11-19 04:31:37,165 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 2.0061652281134403) internal successors, (1627), 811 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 841 [2021-11-19 04:31:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:31:37,176 INFO L225 Difference]: With dead ends: 1685 [2021-11-19 04:31:37,176 INFO L226 Difference]: Without dead ends: 1652 [2021-11-19 04:31:37,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2086 GetRequests, 1277 SyntacticMatches, 0 SemanticMatches, 809 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 219.9s TimeCoverageRelationStatistics Valid=328455, Invalid=328455, Unknown=0, NotChecked=0, Total=656910 [2021-11-19 04:31:37,216 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1212 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:31:37,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1212 Valid, 98 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 1630 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 04:31:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-11-19 04:31:37,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1652. [2021-11-19 04:31:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 1.0012113870381587) internal successors, (1653), 1651 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:31:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 1653 transitions. [2021-11-19 04:31:37,271 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 1653 transitions. Word has length 841 [2021-11-19 04:31:37,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:31:37,273 INFO L470 AbstractCegarLoop]: Abstraction has 1652 states and 1653 transitions. [2021-11-19 04:31:37,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 2.0061652281134403) internal successors, (1627), 811 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:31:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 1653 transitions. [2021-11-19 04:31:37,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1652 [2021-11-19 04:31:37,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:31:37,300 INFO L514 BasicCegarLoop]: trace histogram [808, 808, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:31:37,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:31:37,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de489e1-e0ef-4dee-9e28-b2b6781cc8b8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-19 04:31:37,501 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:31:37,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:31:37,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1477869759, now seen corresponding path program 11 times [2021-11-19 04:31:37,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:31:37,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767480549] [2021-11-19 04:31:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:31:37,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:31:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat