./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/hash_fun.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-data/hash_fun.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y --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 0abab60f5c601fd8191c1a2aa712d4ab55460e987c7d41ca7527c2934792cc0b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:38:23,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:38:23,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:38:23,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:38:23,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:38:23,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:38:23,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:38:23,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:38:23,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:38:23,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:38:23,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:38:23,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:38:23,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:38:23,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:38:23,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:38:23,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:38:23,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:38:23,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:38:23,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:38:23,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:38:23,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:38:23,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:38:23,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:38:23,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:38:23,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:38:23,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:38:23,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:38:23,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:38:23,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:38:23,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:38:23,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:38:23,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:38:23,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:38:23,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:38:23,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:38:23,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:38:23,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:38:23,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:38:23,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:38:23,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:38:23,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:38:23,514 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:38:23,567 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:38:23,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:38:23,568 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:38:23,568 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:38:23,573 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:38:23,574 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:38:23,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:38:23,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:38:23,576 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:38:23,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:38:23,577 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:38:23,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:38:23,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:38:23,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:38:23,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:38:23,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:38:23,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:38:23,580 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:38:23,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:38:23,580 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:38:23,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:38:23,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:38:23,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:38:23,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:38:23,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:38:23,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:38:23,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:38:23,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:38:23,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:38:23,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:38:23,586 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:38:23,586 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:38:23,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:38:23,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:38:23,587 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_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0abab60f5c601fd8191c1a2aa712d4ab55460e987c7d41ca7527c2934792cc0b [2021-11-13 18:38:23,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:38:23,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:38:23,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:38:23,932 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:38:23,933 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:38:23,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/heap-data/hash_fun.i [2021-11-13 18:38:24,050 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/data/21b015acc/c0cc74ec1cbe40dbbbad16559930fece/FLAGbbbd2158f [2021-11-13 18:38:24,773 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:38:24,773 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/sv-benchmarks/c/heap-data/hash_fun.i [2021-11-13 18:38:24,808 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/data/21b015acc/c0cc74ec1cbe40dbbbad16559930fece/FLAGbbbd2158f [2021-11-13 18:38:24,988 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/data/21b015acc/c0cc74ec1cbe40dbbbad16559930fece [2021-11-13 18:38:24,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:38:24,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:38:25,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:38:25,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:38:25,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:38:25,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:38:24" (1/1) ... [2021-11-13 18:38:25,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b72f3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:25, skipping insertion in model container [2021-11-13 18:38:25,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:38:24" (1/1) ... [2021-11-13 18:38:25,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:38:25,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:38:25,453 WARN L228 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_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/sv-benchmarks/c/heap-data/hash_fun.i[23732,23745] [2021-11-13 18:38:25,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:38:25,467 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:38:25,516 WARN L228 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_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/sv-benchmarks/c/heap-data/hash_fun.i[23732,23745] [2021-11-13 18:38:25,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:38:25,555 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:38:25,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:25 WrapperNode [2021-11-13 18:38:25,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:38:25,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:38:25,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:38:25,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:38:25,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:25" (1/1) ... [2021-11-13 18:38:25,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:25" (1/1) ... [2021-11-13 18:38:25,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:38:25,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:38:25,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:38:25,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:38:25,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:25" (1/1) ... [2021-11-13 18:38:25,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:25" (1/1) ... [2021-11-13 18:38:25,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:25" (1/1) ... [2021-11-13 18:38:25,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:25" (1/1) ... [2021-11-13 18:38:25,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:25" (1/1) ... [2021-11-13 18:38:25,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:25" (1/1) ... [2021-11-13 18:38:25,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:25" (1/1) ... [2021-11-13 18:38:25,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:38:25,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:38:25,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:38:25,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:38:25,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:25" (1/1) ... [2021-11-13 18:38:25,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:38:25,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:25,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:38:25,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:38:25,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:38:25,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:38:25,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:38:25,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:38:25,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:38:25,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:38:25,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:38:25,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:38:25,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:38:25,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:38:25,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:38:26,114 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:38:26,115 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 18:38:26,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:38:26 BoogieIcfgContainer [2021-11-13 18:38:26,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:38:26,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:38:26,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:38:26,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:38:26,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:38:24" (1/3) ... [2021-11-13 18:38:26,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ec4226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:38:26, skipping insertion in model container [2021-11-13 18:38:26,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:25" (2/3) ... [2021-11-13 18:38:26,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ec4226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:38:26, skipping insertion in model container [2021-11-13 18:38:26,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:38:26" (3/3) ... [2021-11-13 18:38:26,127 INFO L111 eAbstractionObserver]: Analyzing ICFG hash_fun.i [2021-11-13 18:38:26,133 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:38:26,133 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:38:26,245 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:38:26,253 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:38:26,254 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:38:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 18:38:26,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:26,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:26,295 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:26,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:26,327 INFO L85 PathProgramCache]: Analyzing trace with hash 859985196, now seen corresponding path program 1 times [2021-11-13 18:38:26,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:26,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163680087] [2021-11-13 18:38:26,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:26,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:26,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:26,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163680087] [2021-11-13 18:38:26,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163680087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:26,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:38:26,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:38:26,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838605009] [2021-11-13 18:38:26,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:26,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:38:26,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:26,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:38:26,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:38:26,599 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:26,617 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-11-13 18:38:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:38:26,620 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-13 18:38:26,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:26,630 INFO L225 Difference]: With dead ends: 30 [2021-11-13 18:38:26,631 INFO L226 Difference]: Without dead ends: 15 [2021-11-13 18:38:26,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:38:26,638 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.67ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:26,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.67ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:38:26,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-13 18:38:26,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-13 18:38:26,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-11-13 18:38:26,681 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2021-11-13 18:38:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:26,681 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-11-13 18:38:26,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-11-13 18:38:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-13 18:38:26,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:26,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:26,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:38:26,684 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:26,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1231547617, now seen corresponding path program 1 times [2021-11-13 18:38:26,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:26,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174833625] [2021-11-13 18:38:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:26,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:26,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:26,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174833625] [2021-11-13 18:38:26,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174833625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:26,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:38:26,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:38:26,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799730387] [2021-11-13 18:38:26,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:26,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:38:26,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:26,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:38:26,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:38:26,815 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:26,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:26,897 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-11-13 18:38:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:38:26,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-13 18:38:26,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:26,899 INFO L225 Difference]: With dead ends: 29 [2021-11-13 18:38:26,899 INFO L226 Difference]: Without dead ends: 20 [2021-11-13 18:38:26,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:38:26,902 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.42ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:26,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 11 Unknown, 0 Unchecked, 1.42ms Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 39.28ms Time] [2021-11-13 18:38:26,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-13 18:38:26,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-13 18:38:26,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:26,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-11-13 18:38:26,911 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 9 [2021-11-13 18:38:26,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:26,911 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-11-13 18:38:26,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2021-11-13 18:38:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:38:26,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:26,913 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:26,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:38:26,914 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:26,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2121530184, now seen corresponding path program 1 times [2021-11-13 18:38:26,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:26,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914232402] [2021-11-13 18:38:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:26,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:27,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:27,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914232402] [2021-11-13 18:38:27,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914232402] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:27,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763780458] [2021-11-13 18:38:27,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:27,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:27,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:27,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:27,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:38:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:27,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 18:38:27,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:27,609 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 18:38:27,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 40 [2021-11-13 18:38:27,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-13 18:38:27,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-13 18:38:27,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2021-11-13 18:38:27,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2021-11-13 18:38:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:27,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:28,050 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-13 18:38:28,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 19 [2021-11-13 18:38:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:28,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763780458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:38:28,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:38:28,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-11-13 18:38:28,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395811783] [2021-11-13 18:38:28,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:28,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:38:28,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:28,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:38:28,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:38:28,097 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:28,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:28,255 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2021-11-13 18:38:28,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:38:28,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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) Word has length 15 [2021-11-13 18:38:28,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:28,258 INFO L225 Difference]: With dead ends: 30 [2021-11-13 18:38:28,259 INFO L226 Difference]: Without dead ends: 28 [2021-11-13 18:38:28,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:38:28,265 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.69ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:28,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 36 Invalid, 45 Unknown, 0 Unchecked, 5.69ms Time], IncrementalHoareTripleChecker [10 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 75.51ms Time] [2021-11-13 18:38:28,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-13 18:38:28,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-11-13 18:38:28,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:28,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2021-11-13 18:38:28,284 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 15 [2021-11-13 18:38:28,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:28,285 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2021-11-13 18:38:28,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:28,285 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2021-11-13 18:38:28,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:38:28,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:28,288 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:28,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:38:28,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:28,512 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:28,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:28,513 INFO L85 PathProgramCache]: Analyzing trace with hash -2121528262, now seen corresponding path program 1 times [2021-11-13 18:38:28,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:28,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904952576] [2021-11-13 18:38:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:28,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:28,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:28,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904952576] [2021-11-13 18:38:28,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904952576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:28,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532246746] [2021-11-13 18:38:28,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:28,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:28,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:28,649 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:28,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:38:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 18:38:28,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:28,906 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 18:38:28,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 38 [2021-11-13 18:38:28,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-13 18:38:28,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-13 18:38:29,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2021-11-13 18:38:29,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2021-11-13 18:38:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:29,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:29,203 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-13 18:38:29,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 21 [2021-11-13 18:38:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:29,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532246746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:38:29,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:38:29,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-13 18:38:29,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370960834] [2021-11-13 18:38:29,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:29,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:38:29,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:29,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:38:29,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:38:29,245 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:29,414 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-11-13 18:38:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:38:29,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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 15 [2021-11-13 18:38:29,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:29,417 INFO L225 Difference]: With dead ends: 32 [2021-11-13 18:38:29,417 INFO L226 Difference]: Without dead ends: 25 [2021-11-13 18:38:29,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:38:29,425 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.36ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.40ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:29,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 51 Invalid, 62 Unknown, 0 Unchecked, 6.36ms Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 95.40ms Time] [2021-11-13 18:38:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-13 18:38:29,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-13 18:38:29,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-11-13 18:38:29,439 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 15 [2021-11-13 18:38:29,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:29,440 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-11-13 18:38:29,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-11-13 18:38:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-13 18:38:29,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:29,442 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:29,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:38:29,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-13 18:38:29,663 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:29,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:29,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2123144338, now seen corresponding path program 1 times [2021-11-13 18:38:29,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:29,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568445569] [2021-11-13 18:38:29,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:29,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:29,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:29,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568445569] [2021-11-13 18:38:29,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568445569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:29,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785878369] [2021-11-13 18:38:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:29,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:29,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:29,847 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:29,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:38:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:29,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 18:38:29,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:29,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-13 18:38:30,106 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-13 18:38:30,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 79 [2021-11-13 18:38:30,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:38:30,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 71 [2021-11-13 18:38:30,144 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-13 18:38:30,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 58 [2021-11-13 18:38:30,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:38:30,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-11-13 18:38:30,164 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-13 18:38:30,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 44 treesize of output 44 [2021-11-13 18:38:30,375 INFO L354 Elim1Store]: treesize reduction 75, result has 14.8 percent of original size [2021-11-13 18:38:30,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 73 [2021-11-13 18:38:30,396 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-13 18:38:30,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 64 treesize of output 57 [2021-11-13 18:38:30,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:38:30,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 39 [2021-11-13 18:38:30,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:38:30,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-11-13 18:38:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:30,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:31,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785878369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:38:31,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:38:31,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-13 18:38:31,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051473997] [2021-11-13 18:38:31,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:31,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:38:31,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:31,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:38:31,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:38:31,017 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:31,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:31,100 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-11-13 18:38:31,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:38:31,101 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-13 18:38:31,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:31,102 INFO L225 Difference]: With dead ends: 44 [2021-11-13 18:38:31,103 INFO L226 Difference]: Without dead ends: 30 [2021-11-13 18:38:31,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:38:31,104 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.77ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 74.81ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:31,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 47 Unknown, 0 Unchecked, 1.77ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 14 Unchecked, 74.81ms Time] [2021-11-13 18:38:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-13 18:38:31,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-13 18:38:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-11-13 18:38:31,111 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 20 [2021-11-13 18:38:31,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:31,112 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-11-13 18:38:31,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:31,112 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-11-13 18:38:31,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-13 18:38:31,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:31,114 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:31,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:38:31,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:31,335 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:31,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:31,336 INFO L85 PathProgramCache]: Analyzing trace with hash -153301193, now seen corresponding path program 2 times [2021-11-13 18:38:31,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:31,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174331811] [2021-11-13 18:38:31,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:31,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:31,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:31,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174331811] [2021-11-13 18:38:31,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174331811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:31,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385041587] [2021-11-13 18:38:31,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:38:31,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:31,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:31,665 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:31,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:38:31,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:38:31,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:38:31,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-13 18:38:31,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:31,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-13 18:38:31,868 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 18:38:31,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 51 [2021-11-13 18:38:31,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-11-13 18:38:31,894 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-13 18:38:31,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 53 [2021-11-13 18:38:31,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2021-11-13 18:38:32,166 INFO L354 Elim1Store]: treesize reduction 211, result has 9.8 percent of original size [2021-11-13 18:38:32,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 148 treesize of output 128 [2021-11-13 18:38:32,187 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-13 18:38:32,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2021-11-13 18:38:32,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:38:32,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 83 [2021-11-13 18:38:32,217 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-13 18:38:32,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 86 [2021-11-13 18:38:32,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:38:32,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2021-11-13 18:38:32,244 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-11-13 18:38:32,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 78 [2021-11-13 18:38:32,535 INFO L354 Elim1Store]: treesize reduction 75, result has 14.8 percent of original size [2021-11-13 18:38:32,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 134 treesize of output 99 [2021-11-13 18:38:32,553 INFO L354 Elim1Store]: treesize reduction 49, result has 5.8 percent of original size [2021-11-13 18:38:32,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 98 treesize of output 87 [2021-11-13 18:38:32,570 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-13 18:38:32,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 63 [2021-11-13 18:38:32,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:38:32,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 67 [2021-11-13 18:38:32,759 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-13 18:38:32,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 51 [2021-11-13 18:38:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:32,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:33,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147749 treesize of output 145573 [2021-11-13 18:38:39,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-13 18:38:39,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:38:39,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-13 18:38:39,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441302405] [2021-11-13 18:38:39,465 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:39,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:38:39,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:38:39,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:38:39,467 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:39,693 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-11-13 18:38:39,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:38:39,694 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 26 [2021-11-13 18:38:39,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:39,695 INFO L225 Difference]: With dead ends: 41 [2021-11-13 18:38:39,695 INFO L226 Difference]: Without dead ends: 39 [2021-11-13 18:38:39,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:38:39,696 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:39,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 60 Invalid, 75 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 97.91ms Time] [2021-11-13 18:38:39,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-13 18:38:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-11-13 18:38:39,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-11-13 18:38:39,704 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 26 [2021-11-13 18:38:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:39,704 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-11-13 18:38:39,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:39,705 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-11-13 18:38:39,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-13 18:38:39,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:39,706 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:39,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:38:39,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:39,928 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:39,929 INFO L85 PathProgramCache]: Analyzing trace with hash -153299271, now seen corresponding path program 1 times [2021-11-13 18:38:39,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:39,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220099079] [2021-11-13 18:38:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:39,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:40,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:40,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220099079] [2021-11-13 18:38:40,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220099079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:40,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803787769] [2021-11-13 18:38:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:40,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:40,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:40,127 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:40,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:38:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:40,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-13 18:38:40,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:40,318 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-13 18:38:40,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-11-13 18:38:40,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-13 18:38:40,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 28 [2021-11-13 18:38:40,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 18:38:40,647 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-11-13 18:38:40,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 150 treesize of output 130 [2021-11-13 18:38:40,672 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-13 18:38:40,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 89 [2021-11-13 18:38:40,689 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-13 18:38:40,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 92 [2021-11-13 18:38:40,701 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-11-13 18:38:40,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 89 treesize of output 89 [2021-11-13 18:38:40,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:38:40,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 78 [2021-11-13 18:38:41,028 INFO L354 Elim1Store]: treesize reduction 85, result has 3.4 percent of original size [2021-11-13 18:38:41,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 137 treesize of output 92 [2021-11-13 18:38:41,049 INFO L354 Elim1Store]: treesize reduction 49, result has 5.8 percent of original size [2021-11-13 18:38:41,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 88 [2021-11-13 18:38:41,065 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-13 18:38:41,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 66 [2021-11-13 18:38:41,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:38:41,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 66 [2021-11-13 18:38:41,232 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-13 18:38:41,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 54 [2021-11-13 18:38:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:41,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:41,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4769013 treesize of output 4699381 [2021-11-13 18:39:03,322 WARN L227 SmtUtils]: Spent 21.44s on a formula simplification. DAG size of input: 1012 DAG size of output: 1012 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-13 18:40:42,973 WARN L227 SmtUtils]: Spent 1.66m on a formula simplification. DAG size of input: 1014 DAG size of output: 1010 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-13 18:40:43,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73352 treesize of output 73350 [2021-11-13 18:40:44,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-13 18:40:44,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:40:44,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-13 18:40:44,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498032830] [2021-11-13 18:40:44,368 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:40:44,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:40:44,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:44,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:40:44,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:40:44,370 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:44,650 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-11-13 18:40:44,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:40:44,653 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 26 [2021-11-13 18:40:44,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:44,653 INFO L225 Difference]: With dead ends: 43 [2021-11-13 18:40:44,654 INFO L226 Difference]: Without dead ends: 36 [2021-11-13 18:40:44,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:40:44,655 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.52ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:44,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 72 Unknown, 0 Unchecked, 1.52ms Time], IncrementalHoareTripleChecker [10 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 142.55ms Time] [2021-11-13 18:40:44,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-13 18:40:44,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-11-13 18:40:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-11-13 18:40:44,661 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 26 [2021-11-13 18:40:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:44,661 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-11-13 18:40:44,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-11-13 18:40:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 18:40:44,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:44,667 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-13 18:40:44,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:40:44,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 18:40:44,883 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:44,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1774735439, now seen corresponding path program 3 times [2021-11-13 18:40:44,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:44,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354138982] [2021-11-13 18:40:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:44,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:40:45,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:45,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354138982] [2021-11-13 18:40:45,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354138982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:45,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373503064] [2021-11-13 18:40:45,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:40:45,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:45,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:45,203 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:45,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:40:45,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:40:45,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:40:45,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-13 18:40:45,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:45,481 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-13 18:40:45,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 78 [2021-11-13 18:40:45,513 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-13 18:40:45,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 67 [2021-11-13 18:40:45,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:40:45,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2021-11-13 18:40:45,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 58 treesize of output 57 [2021-11-13 18:40:45,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:40:45,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 52 [2021-11-13 18:40:45,812 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-11-13 18:40:45,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 106 [2021-11-13 18:40:45,844 INFO L354 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2021-11-13 18:40:45,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 104 [2021-11-13 18:40:45,855 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 18:40:45,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 87 [2021-11-13 18:40:45,873 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-11-13 18:40:45,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 112 treesize of output 112 [2021-11-13 18:40:45,893 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-13 18:40:45,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 96 [2021-11-13 18:40:46,245 INFO L354 Elim1Store]: treesize reduction 111, result has 2.6 percent of original size [2021-11-13 18:40:46,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 137 treesize of output 90 [2021-11-13 18:40:46,273 INFO L354 Elim1Store]: treesize reduction 73, result has 8.8 percent of original size [2021-11-13 18:40:46,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 91 treesize of output 91 [2021-11-13 18:40:46,567 INFO L354 Elim1Store]: treesize reduction 115, result has 2.5 percent of original size [2021-11-13 18:40:46,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 124 treesize of output 97 [2021-11-13 18:40:46,592 INFO L354 Elim1Store]: treesize reduction 97, result has 3.0 percent of original size [2021-11-13 18:40:46,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 103 treesize of output 91 [2021-11-13 18:40:46,709 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 18:40:46,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 55 [2021-11-13 18:40:46,718 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 18:40:46,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 30 [2021-11-13 18:40:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:40:46,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:52,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1515 treesize of output 1513 [2021-11-13 18:41:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:18,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373503064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:18,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:18,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-11-13 18:41:18,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516306352] [2021-11-13 18:41:18,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:18,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:41:18,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:18,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:41:18,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=216, Unknown=6, NotChecked=0, Total=272 [2021-11-13 18:41:18,410 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:20,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:20,724 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2021-11-13 18:41:20,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:41:20,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-13 18:41:20,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:20,725 INFO L225 Difference]: With dead ends: 60 [2021-11-13 18:41:20,725 INFO L226 Difference]: Without dead ends: 41 [2021-11-13 18:41:20,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=62, Invalid=273, Unknown=7, NotChecked=0, Total=342 [2021-11-13 18:41:20,727 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.20ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 183.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:20,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 282 Invalid, 105 Unknown, 0 Unchecked, 2.20ms Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 38 Unchecked, 183.60ms Time] [2021-11-13 18:41:20,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-13 18:41:20,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-13 18:41:20,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:20,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-11-13 18:41:20,735 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 31 [2021-11-13 18:41:20,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:20,736 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-11-13 18:41:20,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:20,736 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-11-13 18:41:20,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:41:20,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:20,738 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-11-13 18:41:20,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-13 18:41:20,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:20,964 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:20,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:20,964 INFO L85 PathProgramCache]: Analyzing trace with hash -212280090, now seen corresponding path program 4 times [2021-11-13 18:41:20,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:20,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424183877] [2021-11-13 18:41:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:20,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:21,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:21,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424183877] [2021-11-13 18:41:21,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424183877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:21,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182829373] [2021-11-13 18:41:21,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:41:21,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:21,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:21,552 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:21,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e48e5d38-f620-4c6f-8965-c48ce9a2c08a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:41:21,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:41:21,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:21,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-13 18:41:21,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:21,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-13 18:41:21,823 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-13 18:41:21,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 40 [2021-11-13 18:41:21,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-13 18:41:21,853 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-13 18:41:21,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 42 [2021-11-13 18:41:21,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 18:41:22,216 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-11-13 18:41:22,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 162 treesize of output 142 [2021-11-13 18:41:22,242 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-13 18:41:22,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2021-11-13 18:41:22,264 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-13 18:41:22,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 102 [2021-11-13 18:41:22,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:41:22,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 82 [2021-11-13 18:41:22,315 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-13 18:41:22,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 105 treesize of output 120 [2021-11-13 18:41:22,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:41:22,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 106 [2021-11-13 18:41:22,862 INFO L354 Elim1Store]: treesize reduction 114, result has 16.8 percent of original size [2021-11-13 18:41:22,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 208 treesize of output 188 [2021-11-13 18:41:22,905 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-11-13 18:41:22,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 171 treesize of output 125 [2021-11-13 18:41:22,918 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 18:41:22,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 117 [2021-11-13 18:41:22,954 INFO L354 Elim1Store]: treesize reduction 92, result has 24.0 percent of original size [2021-11-13 18:41:22,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 186 treesize of output 182 [2021-11-13 18:41:22,988 INFO L354 Elim1Store]: treesize reduction 76, result has 26.2 percent of original size [2021-11-13 18:41:22,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 153 [2021-11-13 18:41:23,386 INFO L354 Elim1Store]: treesize reduction 101, result has 11.4 percent of original size [2021-11-13 18:41:23,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 201 treesize of output 128 [2021-11-13 18:41:23,408 INFO L354 Elim1Store]: treesize reduction 73, result has 8.8 percent of original size [2021-11-13 18:41:23,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 149 treesize of output 145 [2021-11-13 18:41:23,422 INFO L354 Elim1Store]: treesize reduction 45, result has 25.0 percent of original size [2021-11-13 18:41:23,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 114 [2021-11-13 18:41:23,794 INFO L354 Elim1Store]: treesize reduction 115, result has 2.5 percent of original size [2021-11-13 18:41:23,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 176 treesize of output 125 [2021-11-13 18:41:23,822 INFO L354 Elim1Store]: treesize reduction 97, result has 3.0 percent of original size [2021-11-13 18:41:23,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 155 treesize of output 143 [2021-11-13 18:41:23,838 INFO L354 Elim1Store]: treesize reduction 45, result has 25.0 percent of original size [2021-11-13 18:41:23,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2021-11-13 18:41:24,096 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:41:24,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 150 treesize of output 93 [2021-11-13 18:41:24,111 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-13 18:41:24,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2021-11-13 18:41:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:24,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:29,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39082692439652 treesize of output 39006725205604