./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer --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 e0b85db7f19d029ed27be7f6b92a191abc3110f8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 22:34:55,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:34:55,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:34:55,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:34:55,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:34:55,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:34:55,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:34:55,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:34:55,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:34:55,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:34:55,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:34:55,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:34:55,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:34:55,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:34:55,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:34:55,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:34:55,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:34:55,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:34:55,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:34:55,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:34:55,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:34:55,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:34:55,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:34:55,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:34:55,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:34:55,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:34:55,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:34:55,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:34:55,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:34:55,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:34:55,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:34:55,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:34:55,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:34:55,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:34:55,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:34:55,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:34:55,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:34:55,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:34:55,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:34:55,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:34:55,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:34:55,452 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 22:34:55,490 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:34:55,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:34:55,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:34:55,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:34:55,493 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:34:55,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:34:55,494 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 22:34:55,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:34:55,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 22:34:55,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:34:55,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 22:34:55,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 22:34:55,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 22:34:55,497 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 22:34:55,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:34:55,497 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:34:55,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 22:34:55,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:34:55,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:34:55,498 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 22:34:55,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 22:34:55,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:34:55,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:34:55,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 22:34:55,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 22:34:55,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:34:55,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 22:34:55,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 22:34:55,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:34:55,500 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-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0b85db7f19d029ed27be7f6b92a191abc3110f8 [2020-11-29 22:34:55,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:34:55,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:34:55,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:34:55,849 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:34:55,850 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:34:55,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i [2020-11-29 22:34:55,934 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/data/ae3107b62/053edcbcc95840da98339c95485d15b2/FLAG3e84e0e25 [2020-11-29 22:34:56,569 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:34:56,570 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i [2020-11-29 22:34:56,596 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/data/ae3107b62/053edcbcc95840da98339c95485d15b2/FLAG3e84e0e25 [2020-11-29 22:34:56,835 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/data/ae3107b62/053edcbcc95840da98339c95485d15b2 [2020-11-29 22:34:56,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:34:56,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:34:56,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:34:56,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:34:56,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:34:56,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:34:56" (1/1) ... [2020-11-29 22:34:56,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d19051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:34:56, skipping insertion in model container [2020-11-29 22:34:56,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:34:56" (1/1) ... [2020-11-29 22:34:56,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:34:56,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:34:57,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:34:57,248 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:34:57,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:34:57,342 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:34:57,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:34:57 WrapperNode [2020-11-29 22:34:57,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:34:57,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:34:57,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:34:57,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:34:57,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:34:57" (1/1) ... [2020-11-29 22:34:57,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:34:57" (1/1) ... [2020-11-29 22:34:57,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:34:57,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:34:57,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:34:57,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:34:57,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:34:57" (1/1) ... [2020-11-29 22:34:57,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:34:57" (1/1) ... [2020-11-29 22:34:57,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:34:57" (1/1) ... [2020-11-29 22:34:57,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:34:57" (1/1) ... [2020-11-29 22:34:57,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:34:57" (1/1) ... [2020-11-29 22:34:57,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:34:57" (1/1) ... [2020-11-29 22:34:57,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:34:57" (1/1) ... [2020-11-29 22:34:57,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:34:57,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:34:57,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:34:57,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:34:57,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:34:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:34:57,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 22:34:57,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 22:34:57,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 22:34:57,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 22:34:57,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 22:34:57,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 22:34:57,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 22:34:57,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 22:34:57,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:34:57,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:34:58,400 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:34:58,401 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-11-29 22:34:58,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:34:58 BoogieIcfgContainer [2020-11-29 22:34:58,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:34:58,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 22:34:58,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 22:34:58,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 22:34:58,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 10:34:56" (1/3) ... [2020-11-29 22:34:58,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e02bd4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:34:58, skipping insertion in model container [2020-11-29 22:34:58,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:34:57" (2/3) ... [2020-11-29 22:34:58,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e02bd4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:34:58, skipping insertion in model container [2020-11-29 22:34:58,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:34:58" (3/3) ... [2020-11-29 22:34:58,416 INFO L111 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-11-29 22:34:58,430 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 22:34:58,434 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 22:34:58,446 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 22:34:58,483 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 22:34:58,483 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 22:34:58,483 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 22:34:58,483 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:34:58,483 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:34:58,483 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 22:34:58,484 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:34:58,484 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 22:34:58,498 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-11-29 22:34:58,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 22:34:58,504 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:34:58,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:34:58,505 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:34:58,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:34:58,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1416944146, now seen corresponding path program 1 times [2020-11-29 22:34:58,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:34:58,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084344457] [2020-11-29 22:34:58,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:34:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:34:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:34:58,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084344457] [2020-11-29 22:34:58,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:34:58,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 22:34:58,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670888611] [2020-11-29 22:34:58,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 22:34:58,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:34:58,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 22:34:58,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 22:34:58,749 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 2 states. [2020-11-29 22:34:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:34:58,779 INFO L93 Difference]: Finished difference Result 103 states and 163 transitions. [2020-11-29 22:34:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 22:34:58,781 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-11-29 22:34:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:34:58,793 INFO L225 Difference]: With dead ends: 103 [2020-11-29 22:34:58,794 INFO L226 Difference]: Without dead ends: 45 [2020-11-29 22:34:58,804 INFO L677 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 [2020-11-29 22:34:58,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-29 22:34:58,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-29 22:34:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 22:34:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-11-29 22:34:58,851 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 18 [2020-11-29 22:34:58,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:34:58,852 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-11-29 22:34:58,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 22:34:58,852 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-11-29 22:34:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 22:34:58,855 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:34:58,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:34:58,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 22:34:58,856 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:34:58,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:34:58,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1171444280, now seen corresponding path program 1 times [2020-11-29 22:34:58,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:34:58,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587189110] [2020-11-29 22:34:58,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:34:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:34:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:34:58,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587189110] [2020-11-29 22:34:58,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:34:58,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:34:58,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677224836] [2020-11-29 22:34:58,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 22:34:58,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:34:58,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:34:58,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:34:58,998 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 3 states. [2020-11-29 22:34:59,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:34:59,018 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-11-29 22:34:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:34:59,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-29 22:34:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:34:59,021 INFO L225 Difference]: With dead ends: 75 [2020-11-29 22:34:59,022 INFO L226 Difference]: Without dead ends: 53 [2020-11-29 22:34:59,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:34:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-29 22:34:59,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-29 22:34:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-29 22:34:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 75 transitions. [2020-11-29 22:34:59,031 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 75 transitions. Word has length 23 [2020-11-29 22:34:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:34:59,031 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 75 transitions. [2020-11-29 22:34:59,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 22:34:59,031 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 75 transitions. [2020-11-29 22:34:59,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 22:34:59,032 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:34:59,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:34:59,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 22:34:59,033 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:34:59,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:34:59,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1613486293, now seen corresponding path program 1 times [2020-11-29 22:34:59,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:34:59,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097186249] [2020-11-29 22:34:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:34:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:34:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:34:59,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097186249] [2020-11-29 22:34:59,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:34:59,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:34:59,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906978422] [2020-11-29 22:34:59,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 22:34:59,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:34:59,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:34:59,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:34:59,118 INFO L87 Difference]: Start difference. First operand 53 states and 75 transitions. Second operand 3 states. [2020-11-29 22:34:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:34:59,152 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-11-29 22:34:59,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:34:59,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-11-29 22:34:59,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:34:59,154 INFO L225 Difference]: With dead ends: 93 [2020-11-29 22:34:59,156 INFO L226 Difference]: Without dead ends: 55 [2020-11-29 22:34:59,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:34:59,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-29 22:34:59,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-11-29 22:34:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 22:34:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2020-11-29 22:34:59,174 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 29 [2020-11-29 22:34:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:34:59,175 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2020-11-29 22:34:59,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 22:34:59,176 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2020-11-29 22:34:59,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 22:34:59,178 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:34:59,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:34:59,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 22:34:59,179 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:34:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:34:59,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1832341011, now seen corresponding path program 1 times [2020-11-29 22:34:59,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:34:59,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203288986] [2020-11-29 22:34:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:34:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:34:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:34:59,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203288986] [2020-11-29 22:34:59,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:34:59,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 22:34:59,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525161246] [2020-11-29 22:34:59,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:34:59,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:34:59,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:34:59,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:34:59,302 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand 5 states. [2020-11-29 22:34:59,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:34:59,492 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-11-29 22:34:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:34:59,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-11-29 22:34:59,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:34:59,498 INFO L225 Difference]: With dead ends: 84 [2020-11-29 22:34:59,498 INFO L226 Difference]: Without dead ends: 78 [2020-11-29 22:34:59,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:34:59,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-29 22:34:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2020-11-29 22:34:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 22:34:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions. [2020-11-29 22:34:59,513 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 29 [2020-11-29 22:34:59,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:34:59,514 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions. [2020-11-29 22:34:59,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:34:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions. [2020-11-29 22:34:59,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 22:34:59,516 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:34:59,517 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:34:59,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 22:34:59,517 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:34:59,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:34:59,518 INFO L82 PathProgramCache]: Analyzing trace with hash -526312690, now seen corresponding path program 1 times [2020-11-29 22:34:59,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:34:59,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007608357] [2020-11-29 22:34:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:34:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:34:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:34:59,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007608357] [2020-11-29 22:34:59,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:34:59,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 22:34:59,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133144116] [2020-11-29 22:34:59,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:34:59,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:34:59,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:34:59,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:34:59,639 INFO L87 Difference]: Start difference. First operand 64 states and 89 transitions. Second operand 5 states. [2020-11-29 22:34:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:34:59,813 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-11-29 22:34:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:34:59,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-11-29 22:34:59,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:34:59,815 INFO L225 Difference]: With dead ends: 86 [2020-11-29 22:34:59,815 INFO L226 Difference]: Without dead ends: 76 [2020-11-29 22:34:59,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:34:59,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-29 22:34:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-11-29 22:34:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-29 22:34:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-11-29 22:34:59,823 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 31 [2020-11-29 22:34:59,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:34:59,823 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-11-29 22:34:59,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:34:59,824 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-11-29 22:34:59,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 22:34:59,825 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:34:59,825 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:34:59,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 22:34:59,825 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:34:59,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:34:59,826 INFO L82 PathProgramCache]: Analyzing trace with hash 665736462, now seen corresponding path program 1 times [2020-11-29 22:34:59,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:34:59,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087084399] [2020-11-29 22:34:59,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:34:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:34:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:34:59,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087084399] [2020-11-29 22:34:59,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:34:59,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 22:34:59,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408930517] [2020-11-29 22:34:59,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:34:59,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:34:59,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:34:59,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:34:59,904 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 5 states. [2020-11-29 22:35:00,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:35:00,185 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-11-29 22:35:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:35:00,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-11-29 22:35:00,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:35:00,187 INFO L225 Difference]: With dead ends: 86 [2020-11-29 22:35:00,187 INFO L226 Difference]: Without dead ends: 73 [2020-11-29 22:35:00,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:35:00,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-29 22:35:00,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2020-11-29 22:35:00,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-29 22:35:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2020-11-29 22:35:00,194 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 31 [2020-11-29 22:35:00,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:35:00,195 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2020-11-29 22:35:00,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:35:00,195 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2020-11-29 22:35:00,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 22:35:00,197 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:35:00,197 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:35:00,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 22:35:00,197 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:35:00,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:35:00,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1093383942, now seen corresponding path program 1 times [2020-11-29 22:35:00,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:35:00,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195866072] [2020-11-29 22:35:00,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:35:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:35:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:00,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195866072] [2020-11-29 22:35:00,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405096339] [2020-11-29 22:35:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:35:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:35:00,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 22:35:00,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:35:00,622 INFO L384 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 [2020-11-29 22:35:00,623 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:00,630 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:00,631 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:00,631 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-29 22:35:00,664 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:00,665 INFO L384 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 11 treesize of output 15 [2020-11-29 22:35:00,665 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:00,693 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:00,699 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-11-29 22:35:00,700 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:00,708 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:00,709 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:00,709 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:18 [2020-11-29 22:35:00,734 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-11-29 22:35:00,735 INFO L384 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 27 treesize of output 11 [2020-11-29 22:35:00,736 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:00,740 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:00,740 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:00,740 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:12 [2020-11-29 22:35:00,768 INFO L384 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 0 case distinctions, treesize of input 19 treesize of output 18 [2020-11-29 22:35:00,769 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:00,778 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:00,781 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-29 22:35:00,781 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:19 [2020-11-29 22:35:00,848 INFO L384 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 0 case distinctions, treesize of input 22 treesize of output 10 [2020-11-29 22:35:00,851 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:00,856 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:00,858 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:00,859 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:26, output treesize:3 [2020-11-29 22:35:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:00,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:35:00,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 22:35:00,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226357477] [2020-11-29 22:35:00,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 22:35:00,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:35:00,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 22:35:00,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:35:00,872 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand 9 states. [2020-11-29 22:35:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:35:01,190 INFO L93 Difference]: Finished difference Result 88 states and 114 transitions. [2020-11-29 22:35:01,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 22:35:01,190 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-11-29 22:35:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:35:01,191 INFO L225 Difference]: With dead ends: 88 [2020-11-29 22:35:01,192 INFO L226 Difference]: Without dead ends: 80 [2020-11-29 22:35:01,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-11-29 22:35:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-29 22:35:01,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-11-29 22:35:01,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-29 22:35:01,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 90 transitions. [2020-11-29 22:35:01,208 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 90 transitions. Word has length 33 [2020-11-29 22:35:01,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:35:01,209 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 90 transitions. [2020-11-29 22:35:01,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 22:35:01,210 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 90 transitions. [2020-11-29 22:35:01,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 22:35:01,213 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:35:01,214 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:35:01,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 22:35:01,415 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:35:01,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:35:01,415 INFO L82 PathProgramCache]: Analyzing trace with hash -293072966, now seen corresponding path program 1 times [2020-11-29 22:35:01,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:35:01,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552395030] [2020-11-29 22:35:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:35:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:35:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:01,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552395030] [2020-11-29 22:35:01,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167660595] [2020-11-29 22:35:01,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:35:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:35:01,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 22:35:01,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:35:01,716 INFO L384 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 [2020-11-29 22:35:01,717 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:01,719 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:01,719 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:01,720 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-29 22:35:01,746 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:01,746 INFO L384 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 11 treesize of output 15 [2020-11-29 22:35:01,747 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:01,759 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:01,768 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-11-29 22:35:01,769 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:01,783 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:01,784 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:01,784 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:18 [2020-11-29 22:35:01,814 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-11-29 22:35:01,814 INFO L384 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 27 treesize of output 11 [2020-11-29 22:35:01,815 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:01,822 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:01,822 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:01,823 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:12 [2020-11-29 22:35:01,842 INFO L384 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 0 case distinctions, treesize of input 19 treesize of output 18 [2020-11-29 22:35:01,843 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:01,860 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:01,862 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-29 22:35:01,862 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:19 [2020-11-29 22:35:01,920 INFO L384 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 0 case distinctions, treesize of input 22 treesize of output 10 [2020-11-29 22:35:01,921 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:01,927 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:01,929 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:01,929 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:26, output treesize:3 [2020-11-29 22:35:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:01,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:35:01,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 22:35:01,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988367663] [2020-11-29 22:35:01,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 22:35:01,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:35:01,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 22:35:01,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:35:01,935 INFO L87 Difference]: Start difference. First operand 66 states and 90 transitions. Second operand 9 states. [2020-11-29 22:35:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:35:02,378 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2020-11-29 22:35:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 22:35:02,380 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-11-29 22:35:02,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:35:02,381 INFO L225 Difference]: With dead ends: 97 [2020-11-29 22:35:02,381 INFO L226 Difference]: Without dead ends: 91 [2020-11-29 22:35:02,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-11-29 22:35:02,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-29 22:35:02,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2020-11-29 22:35:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-29 22:35:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 104 transitions. [2020-11-29 22:35:02,388 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 104 transitions. Word has length 33 [2020-11-29 22:35:02,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:35:02,388 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 104 transitions. [2020-11-29 22:35:02,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 22:35:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 104 transitions. [2020-11-29 22:35:02,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 22:35:02,389 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:35:02,390 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:35:02,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:35:02,590 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:35:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:35:02,591 INFO L82 PathProgramCache]: Analyzing trace with hash -2047331787, now seen corresponding path program 1 times [2020-11-29 22:35:02,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:35:02,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107575899] [2020-11-29 22:35:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:35:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:35:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:02,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107575899] [2020-11-29 22:35:02,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463414469] [2020-11-29 22:35:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:35:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:35:02,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 22:35:02,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:35:02,999 INFO L384 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 [2020-11-29 22:35:02,999 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,003 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:03,003 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,003 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-29 22:35:03,044 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:03,045 INFO L384 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 11 treesize of output 15 [2020-11-29 22:35:03,045 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,058 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:03,058 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,059 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:11 [2020-11-29 22:35:03,113 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-11-29 22:35:03,113 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,124 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:03,131 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-11-29 22:35:03,131 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,152 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:03,155 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,156 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:49, output treesize:29 [2020-11-29 22:35:03,203 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_41|], 2=[|v_#memory_$Pointer$.base_43|, |v_#memory_$Pointer$.offset_41|]} [2020-11-29 22:35:03,208 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2020-11-29 22:35:03,208 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,224 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:03,245 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:03,245 INFO L384 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 132 [2020-11-29 22:35:03,248 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-11-29 22:35:03,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:35:03,249 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,266 INFO L625 ElimStorePlain]: treesize reduction 48, result has 61.0 percent of original size [2020-11-29 22:35:03,269 INFO L384 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 49 [2020-11-29 22:35:03,269 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,281 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:03,281 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,281 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:130, output treesize:30 [2020-11-29 22:35:03,327 INFO L384 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 39 treesize of output 21 [2020-11-29 22:35:03,328 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,338 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:03,342 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-11-29 22:35:03,342 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,351 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:03,352 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,352 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:7 [2020-11-29 22:35:03,360 INFO L384 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 15 treesize of output 7 [2020-11-29 22:35:03,361 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,362 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:03,363 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:03,363 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 22:35:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:03,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:35:03,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-29 22:35:03,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685279826] [2020-11-29 22:35:03,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 22:35:03,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:35:03,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 22:35:03,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-11-29 22:35:03,368 INFO L87 Difference]: Start difference. First operand 77 states and 104 transitions. Second operand 14 states. [2020-11-29 22:35:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:35:04,045 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-11-29 22:35:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 22:35:04,045 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-11-29 22:35:04,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:35:04,046 INFO L225 Difference]: With dead ends: 101 [2020-11-29 22:35:04,046 INFO L226 Difference]: Without dead ends: 95 [2020-11-29 22:35:04,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-11-29 22:35:04,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-29 22:35:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 81. [2020-11-29 22:35:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-29 22:35:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 109 transitions. [2020-11-29 22:35:04,054 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 109 transitions. Word has length 35 [2020-11-29 22:35:04,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:35:04,054 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 109 transitions. [2020-11-29 22:35:04,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 22:35:04,054 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 109 transitions. [2020-11-29 22:35:04,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 22:35:04,055 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:35:04,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:35:04,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:35:04,280 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:35:04,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:35:04,280 INFO L82 PathProgramCache]: Analyzing trace with hash -860258640, now seen corresponding path program 1 times [2020-11-29 22:35:04,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:35:04,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050795990] [2020-11-29 22:35:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:35:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:35:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:04,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050795990] [2020-11-29 22:35:04,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225152374] [2020-11-29 22:35:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:35:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:35:04,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-29 22:35:04,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:35:04,633 INFO L384 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 [2020-11-29 22:35:04,634 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,638 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:04,639 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,639 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-29 22:35:04,686 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:04,686 INFO L384 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 11 treesize of output 15 [2020-11-29 22:35:04,687 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,694 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:04,695 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,695 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:11 [2020-11-29 22:35:04,730 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-11-29 22:35:04,730 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,747 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:04,761 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-11-29 22:35:04,762 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,775 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:04,776 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,776 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:49, output treesize:29 [2020-11-29 22:35:04,808 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_42|], 2=[|v_#memory_$Pointer$.offset_43|, |v_#memory_$Pointer$.base_45|]} [2020-11-29 22:35:04,812 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2020-11-29 22:35:04,812 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,823 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:04,828 INFO L384 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 82 [2020-11-29 22:35:04,829 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,836 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:04,863 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:04,863 INFO L384 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 105 [2020-11-29 22:35:04,865 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 2, 1] term [2020-11-29 22:35:04,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:35:04,866 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,879 INFO L625 ElimStorePlain]: treesize reduction 48, result has 38.5 percent of original size [2020-11-29 22:35:04,879 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,879 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:130, output treesize:30 [2020-11-29 22:35:04,925 INFO L384 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 39 treesize of output 21 [2020-11-29 22:35:04,925 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,933 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:04,937 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-11-29 22:35:04,938 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,948 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:04,950 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,950 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:7 [2020-11-29 22:35:04,964 INFO L384 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 15 treesize of output 7 [2020-11-29 22:35:04,964 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,968 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:04,968 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:04,968 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 22:35:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:04,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:35:04,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-11-29 22:35:04,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125510237] [2020-11-29 22:35:04,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 22:35:04,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:35:04,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 22:35:04,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-11-29 22:35:04,995 INFO L87 Difference]: Start difference. First operand 81 states and 109 transitions. Second operand 15 states. [2020-11-29 22:35:05,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:35:05,605 INFO L93 Difference]: Finished difference Result 103 states and 132 transitions. [2020-11-29 22:35:05,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 22:35:05,606 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-11-29 22:35:05,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:35:05,607 INFO L225 Difference]: With dead ends: 103 [2020-11-29 22:35:05,607 INFO L226 Difference]: Without dead ends: 91 [2020-11-29 22:35:05,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-11-29 22:35:05,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-29 22:35:05,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2020-11-29 22:35:05,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 22:35:05,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2020-11-29 22:35:05,613 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 37 [2020-11-29 22:35:05,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:35:05,613 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2020-11-29 22:35:05,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 22:35:05,613 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2020-11-29 22:35:05,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 22:35:05,614 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:35:05,614 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:35:05,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:35:05,815 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:35:05,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:35:05,815 INFO L82 PathProgramCache]: Analyzing trace with hash 331790512, now seen corresponding path program 2 times [2020-11-29 22:35:05,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:35:05,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222357147] [2020-11-29 22:35:05,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:35:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:35:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:06,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222357147] [2020-11-29 22:35:06,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386761614] [2020-11-29 22:35:06,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:35:06,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:35:06,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:35:06,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-29 22:35:06,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:35:06,196 INFO L384 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 [2020-11-29 22:35:06,196 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,213 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:06,213 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,213 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-29 22:35:06,234 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:06,234 INFO L384 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 11 treesize of output 15 [2020-11-29 22:35:06,234 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,241 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:06,241 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,241 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-11-29 22:35:06,252 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-11-29 22:35:06,253 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,267 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:06,273 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-11-29 22:35:06,273 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,284 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:06,286 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,286 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-11-29 22:35:06,302 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_43|], 2=[|v_#memory_$Pointer$.offset_45|, |v_#memory_$Pointer$.base_47|]} [2020-11-29 22:35:06,305 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2020-11-29 22:35:06,306 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,352 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:06,356 INFO L384 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2020-11-29 22:35:06,356 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,370 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:06,399 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:06,400 INFO L384 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 85 [2020-11-29 22:35:06,401 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 2, 1] term [2020-11-29 22:35:06,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:35:06,402 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,431 INFO L625 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2020-11-29 22:35:06,432 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,432 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-11-29 22:35:06,475 INFO L384 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 31 treesize of output 19 [2020-11-29 22:35:06,476 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,486 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:06,489 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-11-29 22:35:06,490 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,497 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:06,499 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,499 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-11-29 22:35:06,505 INFO L384 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 15 treesize of output 7 [2020-11-29 22:35:06,505 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,509 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:06,509 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:06,509 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 22:35:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:06,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:35:06,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-11-29 22:35:06,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644072513] [2020-11-29 22:35:06,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 22:35:06,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:35:06,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 22:35:06,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-29 22:35:06,555 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 11 states. [2020-11-29 22:35:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:35:06,893 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-11-29 22:35:06,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 22:35:06,893 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-11-29 22:35:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:35:06,894 INFO L225 Difference]: With dead ends: 96 [2020-11-29 22:35:06,894 INFO L226 Difference]: Without dead ends: 81 [2020-11-29 22:35:06,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-11-29 22:35:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-29 22:35:06,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2020-11-29 22:35:06,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-29 22:35:06,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2020-11-29 22:35:06,899 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 37 [2020-11-29 22:35:06,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:35:06,899 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2020-11-29 22:35:06,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 22:35:06,899 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2020-11-29 22:35:06,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 22:35:06,900 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:35:06,900 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:35:07,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-29 22:35:07,101 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:35:07,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:35:07,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1306822559, now seen corresponding path program 2 times [2020-11-29 22:35:07,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:35:07,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241337585] [2020-11-29 22:35:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:35:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:35:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:07,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241337585] [2020-11-29 22:35:07,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308548248] [2020-11-29 22:35:07,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:35:07,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:35:07,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:35:07,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 22:35:07,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:35:07,463 INFO L384 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 [2020-11-29 22:35:07,464 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:07,470 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:07,470 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:07,470 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-29 22:35:07,495 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:07,496 INFO L384 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 11 treesize of output 15 [2020-11-29 22:35:07,496 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:07,509 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:07,514 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-11-29 22:35:07,514 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:07,526 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:07,527 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:07,527 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2020-11-29 22:35:07,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:35:07,538 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-11-29 22:35:07,538 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:07,547 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:07,547 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:07,548 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:15 [2020-11-29 22:35:07,556 INFO L384 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 0 case distinctions, treesize of input 19 treesize of output 18 [2020-11-29 22:35:07,556 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:07,566 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:07,567 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:07,567 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-11-29 22:35:07,624 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-11-29 22:35:07,625 INFO L384 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 34 treesize of output 21 [2020-11-29 22:35:07,625 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:07,640 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:07,641 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-29 22:35:07,641 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:22 [2020-11-29 22:35:07,728 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:07,728 INFO L384 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 2 case distinctions, treesize of input 26 treesize of output 76 [2020-11-29 22:35:07,729 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:07,771 INFO L625 ElimStorePlain]: treesize reduction 32, result has 58.4 percent of original size [2020-11-29 22:35:07,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:35:07,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:35:07,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:35:07,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:35:07,788 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-29 22:35:07,789 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:33, output treesize:45 [2020-11-29 22:35:07,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:35:07,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:35:07,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:35:07,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:35:07,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:35:07,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:35:07,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:35:07,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:35:07,984 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 5, 1] term [2020-11-29 22:35:07,988 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-11-29 22:35:08,091 INFO L384 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 0 case distinctions, treesize of input 22 treesize of output 10 [2020-11-29 22:35:08,092 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:08,108 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:08,109 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:08,109 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-11-29 22:35:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:08,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:35:08,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2020-11-29 22:35:08,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626423732] [2020-11-29 22:35:08,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 22:35:08,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:35:08,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 22:35:08,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-11-29 22:35:08,123 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand 17 states. [2020-11-29 22:35:13,086 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-11-29 22:35:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:35:13,318 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-11-29 22:35:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 22:35:13,319 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-11-29 22:35:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:35:13,320 INFO L225 Difference]: With dead ends: 96 [2020-11-29 22:35:13,320 INFO L226 Difference]: Without dead ends: 90 [2020-11-29 22:35:13,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=127, Invalid=574, Unknown=1, NotChecked=0, Total=702 [2020-11-29 22:35:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-29 22:35:13,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2020-11-29 22:35:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-29 22:35:13,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2020-11-29 22:35:13,334 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 37 [2020-11-29 22:35:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:35:13,335 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2020-11-29 22:35:13,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 22:35:13,335 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2020-11-29 22:35:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 22:35:13,338 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:35:13,338 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:35:13,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:35:13,540 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:35:13,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:35:13,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1056055519, now seen corresponding path program 1 times [2020-11-29 22:35:13,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:35:13,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145986285] [2020-11-29 22:35:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:35:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:35:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:13,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145986285] [2020-11-29 22:35:13,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470819612] [2020-11-29 22:35:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:35:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:35:13,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-29 22:35:13,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:35:13,908 INFO L384 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 [2020-11-29 22:35:13,909 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:13,911 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:13,911 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:13,911 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-29 22:35:13,975 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:13,975 INFO L384 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 17 treesize of output 39 [2020-11-29 22:35:13,976 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:14,007 INFO L625 ElimStorePlain]: treesize reduction 14, result has 69.6 percent of original size [2020-11-29 22:35:14,011 INFO L384 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 [2020-11-29 22:35:14,011 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:14,021 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:14,022 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:14,022 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:28 [2020-11-29 22:35:14,070 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-11-29 22:35:14,070 INFO L384 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 27 treesize of output 11 [2020-11-29 22:35:14,071 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:14,083 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:14,084 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:14,084 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2020-11-29 22:35:14,148 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:14,148 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 16 treesize of output 26 [2020-11-29 22:35:14,149 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:14,163 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:14,169 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-11-29 22:35:14,169 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:14,181 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:14,181 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:14,181 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:38, output treesize:27 [2020-11-29 22:35:14,249 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-11-29 22:35:14,249 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2020-11-29 22:35:14,250 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:14,262 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:14,263 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-29 22:35:14,263 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:27 [2020-11-29 22:35:14,330 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2020-11-29 22:35:14,331 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:14,345 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:14,349 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-29 22:35:14,349 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:34 [2020-11-29 22:35:14,446 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-11-29 22:35:14,448 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:14,464 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:14,466 INFO L545 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:14,466 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:41, output treesize:3 [2020-11-29 22:35:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:14,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:35:14,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2020-11-29 22:35:14,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059432701] [2020-11-29 22:35:14,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 22:35:14,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:35:14,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 22:35:14,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-11-29 22:35:14,503 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand 20 states. [2020-11-29 22:35:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:35:15,719 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2020-11-29 22:35:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 22:35:15,720 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2020-11-29 22:35:15,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:35:15,721 INFO L225 Difference]: With dead ends: 120 [2020-11-29 22:35:15,721 INFO L226 Difference]: Without dead ends: 112 [2020-11-29 22:35:15,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 22:35:15,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-29 22:35:15,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 86. [2020-11-29 22:35:15,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-29 22:35:15,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 114 transitions. [2020-11-29 22:35:15,727 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 114 transitions. Word has length 37 [2020-11-29 22:35:15,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:35:15,727 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 114 transitions. [2020-11-29 22:35:15,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 22:35:15,728 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 114 transitions. [2020-11-29 22:35:15,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-29 22:35:15,729 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:35:15,729 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:35:15,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:35:15,944 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:35:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:35:15,944 INFO L82 PathProgramCache]: Analyzing trace with hash 2099505628, now seen corresponding path program 1 times [2020-11-29 22:35:15,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:35:15,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212120653] [2020-11-29 22:35:15,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:35:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:35:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:16,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212120653] [2020-11-29 22:35:16,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459695399] [2020-11-29 22:35:16,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:35:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:35:16,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-29 22:35:16,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:35:16,292 INFO L384 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 [2020-11-29 22:35:16,292 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:16,293 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:16,294 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:16,294 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-29 22:35:16,346 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:16,346 INFO L384 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 17 treesize of output 39 [2020-11-29 22:35:16,347 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:16,377 INFO L625 ElimStorePlain]: treesize reduction 14, result has 69.6 percent of original size [2020-11-29 22:35:16,382 INFO L384 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 [2020-11-29 22:35:16,382 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:16,394 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:16,394 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:16,394 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:28 [2020-11-29 22:35:16,453 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-11-29 22:35:16,454 INFO L384 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 27 treesize of output 11 [2020-11-29 22:35:16,454 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:16,464 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:16,464 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:16,464 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2020-11-29 22:35:16,515 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:16,516 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 16 treesize of output 26 [2020-11-29 22:35:16,516 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:16,529 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:16,534 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-11-29 22:35:16,534 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:16,547 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:16,547 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:16,547 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:38, output treesize:27 [2020-11-29 22:35:16,595 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-11-29 22:35:16,595 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2020-11-29 22:35:16,595 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:16,603 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:16,604 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-29 22:35:16,604 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:27 [2020-11-29 22:35:16,661 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2020-11-29 22:35:16,661 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:16,676 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:16,679 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-29 22:35:16,679 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:34 [2020-11-29 22:35:16,762 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-11-29 22:35:16,763 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:16,772 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:16,774 INFO L545 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:16,774 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:41, output treesize:3 [2020-11-29 22:35:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:16,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:35:16,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2020-11-29 22:35:16,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528838184] [2020-11-29 22:35:16,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 22:35:16,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:35:16,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 22:35:16,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-11-29 22:35:16,808 INFO L87 Difference]: Start difference. First operand 86 states and 114 transitions. Second operand 20 states. [2020-11-29 22:35:17,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:35:17,755 INFO L93 Difference]: Finished difference Result 130 states and 163 transitions. [2020-11-29 22:35:17,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 22:35:17,756 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-11-29 22:35:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:35:17,757 INFO L225 Difference]: With dead ends: 130 [2020-11-29 22:35:17,757 INFO L226 Difference]: Without dead ends: 120 [2020-11-29 22:35:17,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 22:35:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-29 22:35:17,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2020-11-29 22:35:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-29 22:35:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2020-11-29 22:35:17,768 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 39 [2020-11-29 22:35:17,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:35:17,768 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2020-11-29 22:35:17,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 22:35:17,768 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2020-11-29 22:35:17,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-29 22:35:17,770 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:35:17,770 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:35:17,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 22:35:17,985 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:35:17,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:35:17,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1003412516, now seen corresponding path program 3 times [2020-11-29 22:35:17,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:35:17,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427351384] [2020-11-29 22:35:17,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:35:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:35:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:18,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427351384] [2020-11-29 22:35:18,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13174528] [2020-11-29 22:35:18,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:35:18,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 22:35:18,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:35:18,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 61 conjunts are in the unsatisfiable core [2020-11-29 22:35:18,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:35:18,475 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2020-11-29 22:35:18,479 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,489 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:18,489 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,489 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:9 [2020-11-29 22:35:18,520 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:18,521 INFO L384 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 17 treesize of output 39 [2020-11-29 22:35:18,521 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,555 INFO L625 ElimStorePlain]: treesize reduction 14, result has 63.2 percent of original size [2020-11-29 22:35:18,555 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,555 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2020-11-29 22:35:18,599 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-11-29 22:35:18,599 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,613 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:18,616 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-11-29 22:35:18,616 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,630 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:18,633 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,633 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:40 [2020-11-29 22:35:18,676 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:18,676 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 30 [2020-11-29 22:35:18,677 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,698 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:18,700 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_59|], 2=[|v_#memory_$Pointer$.base_54|, |v_#memory_$Pointer$.offset_47|]} [2020-11-29 22:35:18,705 INFO L384 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 [2020-11-29 22:35:18,706 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,740 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:18,760 INFO L350 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2020-11-29 22:35:18,761 INFO L384 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 39 treesize of output 27 [2020-11-29 22:35:18,761 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,796 INFO L625 ElimStorePlain]: treesize reduction 8, result has 87.3 percent of original size [2020-11-29 22:35:18,800 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-11-29 22:35:18,801 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,816 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:18,816 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,816 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:89, output treesize:40 [2020-11-29 22:35:18,883 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:18,884 INFO L384 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 149 [2020-11-29 22:35:18,885 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[10, 3, 2, 1] term [2020-11-29 22:35:18,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-11-29 22:35:18,886 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,949 INFO L625 ElimStorePlain]: treesize reduction 26, result has 85.6 percent of original size [2020-11-29 22:35:18,952 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 105 [2020-11-29 22:35:18,953 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,975 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:18,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:35:18,980 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 19 [2020-11-29 22:35:18,980 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,997 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:18,997 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:18,997 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:162, output treesize:118 [2020-11-29 22:35:19,049 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_int_61|], 6=[|v_#memory_$Pointer$.offset_49|, |v_#memory_$Pointer$.base_56|]} [2020-11-29 22:35:19,064 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 54 [2020-11-29 22:35:19,064 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:19,099 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:19,148 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:19,148 INFO L384 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 278 treesize of output 257 [2020-11-29 22:35:19,150 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:19,204 INFO L625 ElimStorePlain]: treesize reduction 100, result has 61.8 percent of original size [2020-11-29 22:35:19,238 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:19,238 INFO L384 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 159 treesize of output 145 [2020-11-29 22:35:19,240 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 3, 2, 1] term [2020-11-29 22:35:19,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-29 22:35:19,241 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:19,286 INFO L625 ElimStorePlain]: treesize reduction 108, result has 49.3 percent of original size [2020-11-29 22:35:19,287 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:35:19,287 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:307, output treesize:105 [2020-11-29 22:35:19,427 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:19,427 INFO L384 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 68 [2020-11-29 22:35:19,429 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-11-29 22:35:19,430 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-11-29 22:35:19,431 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 22:35:19,474 INFO L625 ElimStorePlain]: treesize reduction 22, result has 71.1 percent of original size [2020-11-29 22:35:19,478 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2020-11-29 22:35:19,479 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:35:19,491 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:35:19,492 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-29 22:35:19,492 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:30 [2020-11-29 22:35:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:35:19,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:35:19,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-29 22:35:19,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824837023] [2020-11-29 22:35:19,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 22:35:19,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:35:19,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 22:35:19,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-11-29 22:35:19,598 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand 20 states. [2020-11-29 22:35:20,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:35:20,410 INFO L93 Difference]: Finished difference Result 135 states and 169 transitions. [2020-11-29 22:35:20,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 22:35:20,411 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-11-29 22:35:20,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:35:20,412 INFO L225 Difference]: With dead ends: 135 [2020-11-29 22:35:20,412 INFO L226 Difference]: Without dead ends: 127 [2020-11-29 22:35:20,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2020-11-29 22:35:20,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-11-29 22:35:20,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 107. [2020-11-29 22:35:20,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-29 22:35:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2020-11-29 22:35:20,419 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 39 [2020-11-29 22:35:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:35:20,419 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2020-11-29 22:35:20,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 22:35:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2020-11-29 22:35:20,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-29 22:35:20,420 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:35:20,420 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:35:20,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 22:35:20,621 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:35:20,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:35:20,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1726504804, now seen corresponding path program 1 times [2020-11-29 22:35:20,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:35:20,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088228034] [2020-11-29 22:35:20,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:35:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:35:20,669 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:35:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:35:20,700 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:35:20,740 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:35:20,740 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 22:35:20,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-29 22:35:20,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 10:35:20 BoogieIcfgContainer [2020-11-29 22:35:20,824 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 22:35:20,824 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:35:20,824 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:35:20,825 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:35:20,825 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:34:58" (3/4) ... [2020-11-29 22:35:20,827 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 22:35:20,890 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a5c19de4-228c-4584-8fd4-790a73316569/bin/uautomizer/witness.graphml [2020-11-29 22:35:20,890 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:35:20,891 INFO L168 Benchmark]: Toolchain (without parser) took 24049.13 ms. Allocated memory was 98.6 MB in the beginning and 174.1 MB in the end (delta: 75.5 MB). Free memory was 62.8 MB in the beginning and 109.4 MB in the end (delta: -46.6 MB). Peak memory consumption was 28.3 MB. Max. memory is 16.1 GB. [2020-11-29 22:35:20,892 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 98.6 MB. Free memory was 69.7 MB in the beginning and 69.6 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:35:20,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 497.30 ms. Allocated memory is still 98.6 MB. Free memory was 62.7 MB in the beginning and 62.7 MB in the end (delta: -21.7 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 22:35:20,893 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.21 ms. Allocated memory is still 98.6 MB. Free memory was 62.7 MB in the beginning and 60.2 MB in the end (delta: 2.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:35:20,893 INFO L168 Benchmark]: Boogie Preprocessor took 38.19 ms. Allocated memory is still 98.6 MB. Free memory was 60.2 MB in the beginning and 58.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:35:20,893 INFO L168 Benchmark]: RCFGBuilder took 965.23 ms. Allocated memory is still 98.6 MB. Free memory was 58.2 MB in the beginning and 63.4 MB in the end (delta: -5.3 MB). Peak memory consumption was 25.7 MB. Max. memory is 16.1 GB. [2020-11-29 22:35:20,894 INFO L168 Benchmark]: TraceAbstraction took 22419.76 ms. Allocated memory was 98.6 MB in the beginning and 174.1 MB in the end (delta: 75.5 MB). Free memory was 63.0 MB in the beginning and 113.6 MB in the end (delta: -50.6 MB). Peak memory consumption was 26.0 MB. Max. memory is 16.1 GB. [2020-11-29 22:35:20,894 INFO L168 Benchmark]: Witness Printer took 66.21 ms. Allocated memory is still 174.1 MB. Free memory was 113.6 MB in the beginning and 109.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:35:20,896 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 98.6 MB. Free memory was 69.7 MB in the beginning and 69.6 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 497.30 ms. Allocated memory is still 98.6 MB. Free memory was 62.7 MB in the beginning and 62.7 MB in the end (delta: -21.7 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.21 ms. Allocated memory is still 98.6 MB. Free memory was 62.7 MB in the beginning and 60.2 MB in the end (delta: 2.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.19 ms. Allocated memory is still 98.6 MB. Free memory was 60.2 MB in the beginning and 58.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 965.23 ms. Allocated memory is still 98.6 MB. Free memory was 58.2 MB in the beginning and 63.4 MB in the end (delta: -5.3 MB). Peak memory consumption was 25.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22419.76 ms. Allocated memory was 98.6 MB in the beginning and 174.1 MB in the end (delta: 75.5 MB). Free memory was 63.0 MB in the beginning and 113.6 MB in the end (delta: -50.6 MB). Peak memory consumption was 26.0 MB. Max. memory is 16.1 GB. * Witness Printer took 66.21 ms. Allocated memory is still 174.1 MB. Free memory was 113.6 MB in the beginning and 109.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L552] struct TreeNode* root = malloc(sizeof(*root)), *n; [L553] root->left = ((void *)0) [L554] root->right = ((void *)0) [L555] COND FALSE !(__VERIFIER_nondet_int()) [L574] n = ((void *)0) [L575] struct TreeNode* pred; [L576] COND TRUE \read(*root) [L577] pred = ((void *)0) [L578] n = root [L579] EXPR n->left [L579] n->left || n->right [L579] EXPR n->right [L579] n->left || n->right [L579] COND FALSE !(n->left || n->right) [L586] COND FALSE !(\read(*pred)) [L592] root = ((void *)0) [L576] COND FALSE !(\read(*root)) [L595] List a = (List) malloc(sizeof(struct node)); [L596] COND FALSE !(a == 0) [L597] List t; [L598] List p = a; [L599] COND TRUE __VERIFIER_nondet_int() [L600] p->h = 1 [L601] t = (List) malloc(sizeof(struct node)) [L602] COND FALSE !(t == 0) [L603] p->n = t [L604] EXPR p->n [L604] p = p->n [L599] COND FALSE !(__VERIFIER_nondet_int()) [L606] COND TRUE __VERIFIER_nondet_int() [L607] p->h = 2 [L608] t = (List) malloc(sizeof(struct node)) [L609] COND FALSE !(t == 0) [L610] p->n = t [L611] EXPR p->n [L611] p = p->n [L606] COND FALSE !(__VERIFIER_nondet_int()) [L613] p->h = 3 [L614] p = a [L615] EXPR p->h [L615] COND FALSE !(p->h == 2) [L617] EXPR p->h [L617] COND TRUE p->h == 1 [L618] EXPR p->n [L618] p = p->n [L617] EXPR p->h [L617] COND FALSE !(p->h == 1) [L619] EXPR p->h [L619] COND TRUE p->h != 3 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list_and_tree_cnstr-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 22.2s, OverallIterations: 16, TraceHistogramMax: 3, AutomataDifference: 11.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 870 SDtfs, 836 SDslu, 4454 SDs, 0 SdLazy, 2661 SolverSat, 316 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 7.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 517 GetRequests, 303 SyntacticMatches, 6 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 193 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 854 NumberOfCodeBlocks, 854 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 791 ConstructedInterpolants, 26 QuantifiedInterpolants, 223107 SizeOfPredicates, 119 NumberOfNonLiveVariables, 1537 ConjunctsInSsa, 332 ConjunctsInUnsatCore, 24 InterpolantComputations, 6 PerfectInterpolantSequences, 42/134 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...