./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 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:46:51,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:46:51,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:46:51,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:46:51,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:46:51,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:46:51,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:46:51,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:46:51,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:46:51,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:46:51,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:46:51,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:46:51,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:46:51,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:46:51,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:46:51,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:46:51,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:46:51,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:46:51,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:46:51,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:46:51,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:46:51,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:46:51,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:46:51,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:46:51,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:46:51,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:46:51,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:46:51,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:46:51,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:46:51,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:46:51,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:46:51,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:46:51,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:46:51,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:46:51,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:46:51,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:46:51,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:46:51,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:46:51,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:46:51,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:46:51,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:46:51,410 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:46:51,451 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:46:51,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:46:51,452 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:46:51,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:46:51,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:46:51,453 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:46:51,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:46:51,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:46:51,455 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:46:51,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:46:51,456 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:46:51,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:46:51,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:46:51,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:46:51,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:46:51,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:46:51,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:46:51,457 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:46:51,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:46:51,458 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:46:51,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:46:51,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:46:51,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:46:51,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:46:51,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:46:51,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:46:51,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:46:51,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:46:51,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:46:51,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:46:51,461 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:46:51,461 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:46:51,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:46:51,462 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_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 [2022-11-20 10:46:51,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:46:51,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:46:51,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:46:51,787 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:46:51,787 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:46:51,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/array-examples/standard_sentinel-2.i [2022-11-20 10:46:54,804 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:46:55,040 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:46:55,041 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/sv-benchmarks/c/array-examples/standard_sentinel-2.i [2022-11-20 10:46:55,068 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/data/5b246e7fa/421c2351be314f5d8bee235ed89442ee/FLAG455a107e2 [2022-11-20 10:46:55,082 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/data/5b246e7fa/421c2351be314f5d8bee235ed89442ee [2022-11-20 10:46:55,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:46:55,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:46:55,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:46:55,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:46:55,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:46:55,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:46:55" (1/1) ... [2022-11-20 10:46:55,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1506fe17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:55, skipping insertion in model container [2022-11-20 10:46:55,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:46:55" (1/1) ... [2022-11-20 10:46:55,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:46:55,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:46:55,294 WARN L237 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_2b4c644b-17e6-48ea-9e94-0ede8527573c/sv-benchmarks/c/array-examples/standard_sentinel-2.i[852,865] [2022-11-20 10:46:55,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:46:55,318 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:46:55,332 WARN L237 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_2b4c644b-17e6-48ea-9e94-0ede8527573c/sv-benchmarks/c/array-examples/standard_sentinel-2.i[852,865] [2022-11-20 10:46:55,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:46:55,360 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:46:55,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:55 WrapperNode [2022-11-20 10:46:55,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:46:55,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:46:55,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:46:55,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:46:55,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:55" (1/1) ... [2022-11-20 10:46:55,375 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:55" (1/1) ... [2022-11-20 10:46:55,392 INFO L138 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2022-11-20 10:46:55,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:46:55,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:46:55,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:46:55,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:46:55,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:55" (1/1) ... [2022-11-20 10:46:55,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:55" (1/1) ... [2022-11-20 10:46:55,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:55" (1/1) ... [2022-11-20 10:46:55,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:55" (1/1) ... [2022-11-20 10:46:55,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:55" (1/1) ... [2022-11-20 10:46:55,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:55" (1/1) ... [2022-11-20 10:46:55,415 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:55" (1/1) ... [2022-11-20 10:46:55,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:55" (1/1) ... [2022-11-20 10:46:55,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:46:55,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:46:55,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:46:55,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:46:55,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:55" (1/1) ... [2022-11-20 10:46:55,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:46:55,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:46:55,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:46:55,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:46:55,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:46:55,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:46:55,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:46:55,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:46:55,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:46:55,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:46:55,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:46:55,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:46:55,599 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:46:55,602 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:46:55,789 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:46:55,795 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:46:55,797 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:46:55,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:46:55 BoogieIcfgContainer [2022-11-20 10:46:55,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:46:55,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:46:55,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:46:55,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:46:55,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:46:55" (1/3) ... [2022-11-20 10:46:55,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7878574f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:46:55, skipping insertion in model container [2022-11-20 10:46:55,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:55" (2/3) ... [2022-11-20 10:46:55,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7878574f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:46:55, skipping insertion in model container [2022-11-20 10:46:55,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:46:55" (3/3) ... [2022-11-20 10:46:55,811 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2022-11-20 10:46:55,848 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:46:55,849 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:46:55,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:46:55,952 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@43c5d174, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:46:55,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:46:55,957 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) [2022-11-20 10:46:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:46:55,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:46:55,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:46:55,965 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:46:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:55,973 INFO L85 PathProgramCache]: Analyzing trace with hash 214135089, now seen corresponding path program 1 times [2022-11-20 10:46:55,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:55,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520774730] [2022-11-20 10:46:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:55,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:56,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:56,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520774730] [2022-11-20 10:46:56,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520774730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:46:56,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:46:56,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:46:56,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812103230] [2022-11-20 10:46:56,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:46:56,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:46:56,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:46:56,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:46:56,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:46:56,380 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) [2022-11-20 10:46:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:46:56,429 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2022-11-20 10:46:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:46:56,433 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 [2022-11-20 10:46:56,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:46:56,453 INFO L225 Difference]: With dead ends: 30 [2022-11-20 10:46:56,454 INFO L226 Difference]: Without dead ends: 13 [2022-11-20 10:46:56,458 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:46:56,472 INFO L413 NwaCegarLoop]: 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 [2022-11-20 10:46:56,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:46:56,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-20 10:46:56,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-20 10:46:56,502 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) [2022-11-20 10:46:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-11-20 10:46:56,504 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2022-11-20 10:46:56,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:46:56,504 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-11-20 10:46:56,505 INFO L496 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) [2022-11-20 10:46:56,505 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-11-20 10:46:56,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:46:56,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:46:56,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:46:56,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:46:56,513 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:46:56,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:56,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1622702096, now seen corresponding path program 1 times [2022-11-20 10:46:56,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:56,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916432212] [2022-11-20 10:46:56,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:56,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:56,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:56,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916432212] [2022-11-20 10:46:56,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916432212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:46:56,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922663416] [2022-11-20 10:46:56,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:56,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:46:56,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:46:56,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:46:56,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:46:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:56,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:46:56,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:46:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:56,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:46:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:56,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922663416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:46:56,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:46:56,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 10:46:56,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874873115] [2022-11-20 10:46:56,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:46:56,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:46:56,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:46:56,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:46:56,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:46:56,807 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) [2022-11-20 10:46:56,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:46:56,840 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-11-20 10:46:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:46:56,841 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 [2022-11-20 10:46:56,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:46:56,842 INFO L225 Difference]: With dead ends: 25 [2022-11-20 10:46:56,842 INFO L226 Difference]: Without dead ends: 18 [2022-11-20 10:46:56,842 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:46:56,844 INFO L413 NwaCegarLoop]: 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 [2022-11-20 10:46:56,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:46:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-20 10:46:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-20 10:46:56,848 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) [2022-11-20 10:46:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-20 10:46:56,849 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2022-11-20 10:46:56,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:46:56,850 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-20 10:46:56,850 INFO L496 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) [2022-11-20 10:46:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-20 10:46:56,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 10:46:56,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:46:56,851 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:46:56,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:46:57,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:46:57,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:46:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:57,057 INFO L85 PathProgramCache]: Analyzing trace with hash 49509066, now seen corresponding path program 2 times [2022-11-20 10:46:57,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:57,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883086382] [2022-11-20 10:46:57,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:57,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 10:46:57,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:57,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883086382] [2022-11-20 10:46:57,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883086382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:46:57,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:46:57,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:46:57,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152796279] [2022-11-20 10:46:57,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:46:57,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:46:57,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:46:57,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:46:57,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:46:57,254 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) [2022-11-20 10:46:57,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:46:57,276 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-11-20 10:46:57,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:46:57,277 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 [2022-11-20 10:46:57,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:46:57,277 INFO L225 Difference]: With dead ends: 24 [2022-11-20 10:46:57,277 INFO L226 Difference]: Without dead ends: 20 [2022-11-20 10:46:57,278 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:46:57,279 INFO L413 NwaCegarLoop]: 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 [2022-11-20 10:46:57,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:46:57,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-20 10:46:57,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-20 10:46:57,283 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) [2022-11-20 10:46:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-20 10:46:57,284 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2022-11-20 10:46:57,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:46:57,284 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-20 10:46:57,285 INFO L496 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) [2022-11-20 10:46:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-20 10:46:57,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 10:46:57,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:46:57,285 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:46:57,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:46:57,286 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:46:57,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:57,286 INFO L85 PathProgramCache]: Analyzing trace with hash 382246981, now seen corresponding path program 1 times [2022-11-20 10:46:57,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:57,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930099604] [2022-11-20 10:46:57,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:57,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:46:57,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:57,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930099604] [2022-11-20 10:46:57,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930099604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:46:57,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937021790] [2022-11-20 10:46:57,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:57,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:46:57,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:46:57,443 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:46:57,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:46:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:57,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:46:57,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:46:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:46:57,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:46:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:46:57,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937021790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:46:57,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:46:57,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-20 10:46:57,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795179528] [2022-11-20 10:46:57,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:46:57,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:46:57,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:46:57,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:46:57,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:46:57,679 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) [2022-11-20 10:46:57,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:46:57,757 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-11-20 10:46:57,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:46:57,758 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 [2022-11-20 10:46:57,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:46:57,760 INFO L225 Difference]: With dead ends: 41 [2022-11-20 10:46:57,760 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 10:46:57,761 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:46:57,765 INFO L413 NwaCegarLoop]: 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:46:57,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:46:57,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 10:46:57,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-20 10:46:57,774 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) [2022-11-20 10:46:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-11-20 10:46:57,775 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 19 [2022-11-20 10:46:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:46:57,775 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-11-20 10:46:57,776 INFO L496 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) [2022-11-20 10:46:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-11-20 10:46:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 10:46:57,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:46:57,777 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:46:57,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:46:57,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:46:57,983 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:46:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:57,983 INFO L85 PathProgramCache]: Analyzing trace with hash 822799929, now seen corresponding path program 2 times [2022-11-20 10:46:57,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:57,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071799283] [2022-11-20 10:46:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:57,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:46:58,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:58,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071799283] [2022-11-20 10:46:58,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071799283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:46:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999315990] [2022-11-20 10:46:58,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:46:58,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:46:58,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:46:58,318 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:46:58,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:46:58,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:46:58,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:46:58,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:46:58,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:46:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:46:58,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:46:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:46:58,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999315990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:46:58,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:46:58,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-20 10:46:58,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908474881] [2022-11-20 10:46:58,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:46:58,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 10:46:58,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:46:58,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 10:46:58,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:46:58,768 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) [2022-11-20 10:46:58,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:46:58,859 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-11-20 10:46:58,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 10:46:58,860 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 [2022-11-20 10:46:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:46:58,861 INFO L225 Difference]: With dead ends: 65 [2022-11-20 10:46:58,861 INFO L226 Difference]: Without dead ends: 56 [2022-11-20 10:46:58,867 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:46:58,869 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-20 10:46:58,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:46:58,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-20 10:46:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-20 10:46:58,878 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) [2022-11-20 10:46:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-11-20 10:46:58,879 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 31 [2022-11-20 10:46:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:46:58,880 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-11-20 10:46:58,880 INFO L496 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) [2022-11-20 10:46:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-11-20 10:46:58,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 10:46:58,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:46:58,881 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:46:58,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:46:59,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:46:59,089 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:46:59,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:59,090 INFO L85 PathProgramCache]: Analyzing trace with hash 798531617, now seen corresponding path program 3 times [2022-11-20 10:46:59,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:59,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23262346] [2022-11-20 10:46:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:59,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:46:59,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:59,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23262346] [2022-11-20 10:46:59,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23262346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:46:59,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253569217] [2022-11-20 10:46:59,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:46:59,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:46:59,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:46:59,870 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:46:59,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:46:59,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:46:59,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:46:59,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:46:59,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:00,007 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 10:47:00,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:47:00,058 INFO L350 Elim1Store]: Elim1 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 19 [2022-11-20 10:47:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-20 10:47:00,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:47:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-20 10:47:00,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253569217] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:47:00,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:47:00,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 33 [2022-11-20 10:47:00,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998332307] [2022-11-20 10:47:00,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:47:00,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 10:47:00,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:00,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 10:47:00,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 10:47:00,368 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 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) [2022-11-20 10:47:00,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:00,706 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-11-20 10:47:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 10:47:00,706 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 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 [2022-11-20 10:47:00,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:00,707 INFO L225 Difference]: With dead ends: 76 [2022-11-20 10:47:00,707 INFO L226 Difference]: Without dead ends: 63 [2022-11-20 10:47:00,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 10:47:00,709 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:00,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:47:00,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-20 10:47:00,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-11-20 10:47:00,716 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) [2022-11-20 10:47:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-11-20 10:47:00,717 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 55 [2022-11-20 10:47:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:00,718 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-11-20 10:47:00,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 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) [2022-11-20 10:47:00,718 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-11-20 10:47:00,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-20 10:47:00,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:00,720 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:00,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:47:00,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:00,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:00,925 INFO L85 PathProgramCache]: Analyzing trace with hash 498607765, now seen corresponding path program 4 times [2022-11-20 10:47:00,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:00,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732862624] [2022-11-20 10:47:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:00,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:47:01,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:01,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732862624] [2022-11-20 10:47:01,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732862624] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:47:01,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393496974] [2022-11-20 10:47:01,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:47:01,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:01,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:01,675 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:01,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:47:01,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:47:01,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:47:01,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 10:47:01,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:47:01,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:47:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:47:02,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393496974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:47:02,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:47:02,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-11-20 10:47:02,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902765152] [2022-11-20 10:47:02,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:47:02,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 10:47:02,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:02,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 10:47:02,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 10:47:02,884 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) [2022-11-20 10:47:03,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:03,089 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2022-11-20 10:47:03,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 10:47:03,090 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 [2022-11-20 10:47:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:03,096 INFO L225 Difference]: With dead ends: 125 [2022-11-20 10:47:03,096 INFO L226 Difference]: Without dead ends: 112 [2022-11-20 10:47:03,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 10:47:03,099 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:03,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 42 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:47:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-20 10:47:03,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-11-20 10:47:03,117 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) [2022-11-20 10:47:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-11-20 10:47:03,121 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 61 [2022-11-20 10:47:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:03,121 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-11-20 10:47:03,122 INFO L496 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) [2022-11-20 10:47:03,122 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-11-20 10:47:03,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-20 10:47:03,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:03,127 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:03,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:47:03,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:03,333 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:03,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:03,333 INFO L85 PathProgramCache]: Analyzing trace with hash -804209501, now seen corresponding path program 5 times [2022-11-20 10:47:03,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:03,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815394226] [2022-11-20 10:47:03,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:03,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:47:05,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:05,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815394226] [2022-11-20 10:47:05,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815394226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:47:05,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031423199] [2022-11-20 10:47:05,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:47:05,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:05,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:05,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:05,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:47:24,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2022-11-20 10:47:24,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:47:24,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 10:47:24,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:47:24,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:47:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:47:27,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031423199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:47:27,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:47:27,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2022-11-20 10:47:27,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154768652] [2022-11-20 10:47:27,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:47:27,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-20 10:47:27,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:27,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-20 10:47:27,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 10:47:27,842 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) [2022-11-20 10:47:28,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:28,273 INFO L93 Difference]: Finished difference Result 225 states and 276 transitions. [2022-11-20 10:47:28,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-20 10:47:28,274 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 [2022-11-20 10:47:28,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:28,278 INFO L225 Difference]: With dead ends: 225 [2022-11-20 10:47:28,278 INFO L226 Difference]: Without dead ends: 212 [2022-11-20 10:47:28,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 10:47:28,283 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 98 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:28,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 66 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:47:28,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-20 10:47:28,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-11-20 10:47:28,334 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) [2022-11-20 10:47:28,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2022-11-20 10:47:28,335 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 111 [2022-11-20 10:47:28,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:28,335 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2022-11-20 10:47:28,336 INFO L496 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) [2022-11-20 10:47:28,336 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2022-11-20 10:47:28,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-11-20 10:47:28,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:28,338 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:28,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:47:28,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:47:28,554 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:28,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:28,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1800984001, now seen corresponding path program 6 times [2022-11-20 10:47:28,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:28,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560652105] [2022-11-20 10:47:28,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:28,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:47:36,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:36,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560652105] [2022-11-20 10:47:36,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560652105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:47:36,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779010000] [2022-11-20 10:47:36,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:47:36,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:36,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:36,253 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:36,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:47:36,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-20 10:47:36,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:47:36,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 10:47:36,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:36,505 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 10:47:37,041 INFO L321 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2022-11-20 10:47:37,042 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 10:47:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2022-11-20 10:47:37,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:47:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2022-11-20 10:47:38,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779010000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:47:38,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:47:38,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 10, 10] total 117 [2022-11-20 10:47:38,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886003753] [2022-11-20 10:47:38,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:47:38,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-11-20 10:47:38,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:38,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-11-20 10:47:38,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5117, Invalid=8455, Unknown=0, NotChecked=0, Total=13572 [2022-11-20 10:47:38,437 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 117 states, 117 states have (on average 1.982905982905983) internal successors, (232), 117 states have internal predecessors, (232), 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) [2022-11-20 10:47:40,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:40,150 INFO L93 Difference]: Finished difference Result 238 states and 243 transitions. [2022-11-20 10:47:40,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-11-20 10:47:40,151 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.982905982905983) internal successors, (232), 117 states have internal predecessors, (232), 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 [2022-11-20 10:47:40,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:40,152 INFO L225 Difference]: With dead ends: 238 [2022-11-20 10:47:40,152 INFO L226 Difference]: Without dead ends: 221 [2022-11-20 10:47:40,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5181, Invalid=10071, Unknown=0, NotChecked=0, Total=15252 [2022-11-20 10:47:40,157 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 115 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:40,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 68 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 328 Invalid, 0 Unknown, 83 Unchecked, 0.4s Time] [2022-11-20 10:47:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-20 10:47:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-11-20 10:47:40,195 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) [2022-11-20 10:47:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2022-11-20 10:47:40,197 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 211 [2022-11-20 10:47:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:40,199 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2022-11-20 10:47:40,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.982905982905983) internal successors, (232), 117 states have internal predecessors, (232), 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) [2022-11-20 10:47:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2022-11-20 10:47:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-20 10:47:40,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:40,207 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:40,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:47:40,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:40,414 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:40,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:40,415 INFO L85 PathProgramCache]: Analyzing trace with hash -43122706, now seen corresponding path program 7 times [2022-11-20 10:47:40,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:40,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020061297] [2022-11-20 10:47:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:40,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9843 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 10:47:47,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:47,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020061297] [2022-11-20 10:47:47,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020061297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:47:47,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142869657] [2022-11-20 10:47:47,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:47:47,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:47,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:47,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:47,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:47:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:47,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-20 10:47:47,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9843 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 10:47:48,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:48:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9843 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 10:48:00,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142869657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:48:00,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:48:00,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2022-11-20 10:48:00,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633147190] [2022-11-20 10:48:00,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:48:00,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-20 10:48:00,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:00,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-20 10:48:00,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2022-11-20 10:48:00,778 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) [2022-11-20 10:48:01,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:48:01,963 INFO L93 Difference]: Finished difference Result 441 states and 543 transitions. [2022-11-20 10:48:01,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-20 10:48:01,964 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 [2022-11-20 10:48:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:48:01,966 INFO L225 Difference]: With dead ends: 441 [2022-11-20 10:48:01,967 INFO L226 Difference]: Without dead ends: 422 [2022-11-20 10:48:01,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2022-11-20 10:48:01,972 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 200 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:48:01,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 74 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:48:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-20 10:48:01,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2022-11-20 10:48:01,991 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) [2022-11-20 10:48:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 423 transitions. [2022-11-20 10:48:01,993 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 423 transitions. Word has length 219 [2022-11-20 10:48:01,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:48:01,993 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 423 transitions. [2022-11-20 10:48:01,994 INFO L496 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) [2022-11-20 10:48:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 423 transitions. [2022-11-20 10:48:02,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-11-20 10:48:02,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:48:02,002 INFO L195 NwaCegarLoop]: trace histogram [200, 200, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:48:02,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:48:02,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:48:02,209 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:48:02,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:02,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1310128924, now seen corresponding path program 8 times [2022-11-20 10:48:02,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:02,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32682553] [2022-11-20 10:48:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:02,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 40042 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 10:48:29,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:29,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32682553] [2022-11-20 10:48:29,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32682553] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:48:29,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179717842] [2022-11-20 10:48:29,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:48:29,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:29,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:48:29,755 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:48:29,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:48:30,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:48:30,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:48:30,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-20 10:48:30,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:48:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 40042 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 10:48:31,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 40042 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 10:49:20,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179717842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:20,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:20,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2022-11-20 10:49:20,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682975822] [2022-11-20 10:49:20,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:20,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-20 10:49:20,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:20,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-20 10:49:20,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2022-11-20 10:49:20,517 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) [2022-11-20 10:49:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:25,740 INFO L93 Difference]: Finished difference Result 845 states and 1048 transitions. [2022-11-20 10:49:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-20 10:49:25,742 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 [2022-11-20 10:49:25,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:25,745 INFO L225 Difference]: With dead ends: 845 [2022-11-20 10:49:25,745 INFO L226 Difference]: Without dead ends: 826 [2022-11-20 10:49:25,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1043 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 64.7s TimeCoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2022-11-20 10:49:25,754 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 402 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:25,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 66 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 10:49:25,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-11-20 10:49:25,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2022-11-20 10:49:25,779 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) [2022-11-20 10:49:25,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 827 transitions. [2022-11-20 10:49:25,781 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 827 transitions. Word has length 421 [2022-11-20 10:49:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:25,782 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 827 transitions. [2022-11-20 10:49:25,783 INFO L496 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) [2022-11-20 10:49:25,783 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 827 transitions. [2022-11-20 10:49:25,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2022-11-20 10:49:25,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:25,811 INFO L195 NwaCegarLoop]: trace histogram [402, 402, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:25,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:26,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 10:49:26,020 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:26,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:26,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1528066992, now seen corresponding path program 9 times [2022-11-20 10:49:26,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:26,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218600334] [2022-11-20 10:49:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:26,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 161646 backedges. 0 proven. 161604 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 10:51:23,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:23,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218600334] [2022-11-20 10:51:23,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218600334] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:23,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897087295] [2022-11-20 10:51:23,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:51:23,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:23,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:23,734 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:23,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:51:24,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 10:51:24,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:24,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 10:51:24,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:24,326 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 10:51:31,237 INFO L321 Elim1Store]: treesize reduction 20, result has 89.6 percent of original size [2022-11-20 10:51:31,238 INFO L350 Elim1Store]: Elim1 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 75 treesize of output 199 [2022-11-20 10:51:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 161646 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2022-11-20 10:51:33,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 161646 backedges. 0 proven. 41 refuted. 1 times theorem prover too weak. 161604 trivial. 0 not checked. [2022-11-20 10:51:44,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897087295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:44,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:44,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 16, 16] total 433 [2022-11-20 10:51:44,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050863638] [2022-11-20 10:51:44,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:44,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 433 states [2022-11-20 10:51:44,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:44,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 433 interpolants. [2022-11-20 10:51:44,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82006, Invalid=105049, Unknown=1, NotChecked=0, Total=187056 [2022-11-20 10:51:44,240 INFO L87 Difference]: Start difference. First operand 826 states and 827 transitions. Second operand has 433 states, 433 states have (on average 1.9676674364896074) internal successors, (852), 433 states have internal predecessors, (852), 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) [2022-11-20 10:52:06,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:06,572 INFO L93 Difference]: Finished difference Result 864 states and 872 transitions. [2022-11-20 10:52:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 431 states. [2022-11-20 10:52:06,573 INFO L78 Accepts]: Start accepts. Automaton has has 433 states, 433 states have (on average 1.9676674364896074) internal successors, (852), 433 states have internal predecessors, (852), 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 [2022-11-20 10:52:06,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:06,578 INFO L225 Difference]: With dead ends: 864 [2022-11-20 10:52:06,578 INFO L226 Difference]: Without dead ends: 841 [2022-11-20 10:52:06,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2066 GetRequests, 1622 SyntacticMatches, 0 SemanticMatches, 444 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11727 ImplicationChecksByTransitivity, 98.6s TimeCoverageRelationStatistics Valid=82231, Invalid=116237, Unknown=2, NotChecked=0, Total=198470 [2022-11-20 10:52:06,594 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 438 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:06,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 89 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 999 Invalid, 0 Unknown, 203 Unchecked, 1.2s Time] [2022-11-20 10:52:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-11-20 10:52:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 840. [2022-11-20 10:52:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 1.00238379022646) internal successors, (841), 839 states have internal predecessors, (841), 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) [2022-11-20 10:52:06,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 841 transitions. [2022-11-20 10:52:06,627 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 841 transitions. Word has length 825 [2022-11-20 10:52:06,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:06,628 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 841 transitions. [2022-11-20 10:52:06,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 433 states, 433 states have (on average 1.9676674364896074) internal successors, (852), 433 states have internal predecessors, (852), 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) [2022-11-20 10:52:06,629 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 841 transitions. [2022-11-20 10:52:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2022-11-20 10:52:06,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:06,637 INFO L195 NwaCegarLoop]: trace histogram [403, 403, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:06,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:06,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:06,844 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:06,844 INFO L85 PathProgramCache]: Analyzing trace with hash 457824048, now seen corresponding path program 10 times [2022-11-20 10:52:06,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:06,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141992249] [2022-11-20 10:52:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:06,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 162565 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-20 10:54:13,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:13,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141992249] [2022-11-20 10:54:13,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141992249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:13,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280218280] [2022-11-20 10:54:13,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:54:13,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:13,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:13,319 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:13,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:54:14,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:54:14,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:14,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 3746 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-20 10:54:14,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 162565 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-20 10:54:16,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 162565 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-20 10:58:00,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280218280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:00,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:58:00,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [406, 406, 406] total 811 [2022-11-20 10:58:00,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287751666] [2022-11-20 10:58:00,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:00,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-11-20 10:58:00,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:00,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-11-20 10:58:00,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328455, Invalid=328455, Unknown=0, NotChecked=0, Total=656910 [2022-11-20 10:58:00,939 INFO L87 Difference]: Start difference. First operand 840 states and 841 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) [2022-11-20 10:58:29,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:29,698 INFO L93 Difference]: Finished difference Result 1681 states and 2087 transitions. [2022-11-20 10:58:29,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-11-20 10:58:29,700 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 839 [2022-11-20 10:58:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:29,707 INFO L225 Difference]: With dead ends: 1681 [2022-11-20 10:58:29,708 INFO L226 Difference]: Without dead ends: 1650 [2022-11-20 10:58:29,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2082 GetRequests, 1273 SyntacticMatches, 0 SemanticMatches, 809 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 296.6s TimeCoverageRelationStatistics Valid=328455, Invalid=328455, Unknown=0, NotChecked=0, Total=656910 [2022-11-20 10:58:29,746 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 808 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:29,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 50 Invalid, 2037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-20 10:58:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-11-20 10:58:29,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1650. [2022-11-20 10:58:29,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 1.0012128562765312) internal successors, (1651), 1649 states have internal predecessors, (1651), 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) [2022-11-20 10:58:29,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 1651 transitions. [2022-11-20 10:58:29,810 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 1651 transitions. Word has length 839 [2022-11-20 10:58:29,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:29,811 INFO L495 AbstractCegarLoop]: Abstraction has 1650 states and 1651 transitions. [2022-11-20 10:58:29,813 INFO L496 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) [2022-11-20 10:58:29,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 1651 transitions. [2022-11-20 10:58:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1650 [2022-11-20 10:58:29,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:29,839 INFO L195 NwaCegarLoop]: trace histogram [808, 808, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:29,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:30,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4c644b-17e6-48ea-9e94-0ede8527573c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:30,055 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:30,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:30,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1552424762, now seen corresponding path program 11 times [2022-11-20 10:58:30,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:30,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238124472] [2022-11-20 10:58:30,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:30,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat