./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound10.c --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_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/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 0bc6a4fccf15f71e757bedea1c51d4def5df9848 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 20:26:55,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:26:55,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:26:55,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:26:55,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:26:55,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:26:55,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:26:55,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:26:55,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:26:55,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:26:55,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:26:55,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:26:55,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:26:55,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:26:55,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:26:55,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:26:55,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:26:55,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:26:55,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:26:55,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:26:55,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:26:55,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:26:55,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:26:55,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:26:55,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:26:55,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:26:55,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:26:55,641 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:26:55,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:26:55,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:26:55,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:26:55,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:26:55,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:26:55,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:26:55,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:26:55,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:26:55,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:26:55,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:26:55,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:26:55,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:26:55,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:26:55,658 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 20:26:55,709 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:26:55,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:26:55,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:26:55,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:26:55,712 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:26:55,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:26:55,713 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:26:55,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:26:55,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:26:55,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:26:55,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:26:55,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:26:55,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:26:55,716 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:26:55,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:26:55,717 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:26:55,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:26:55,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:26:55,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:26:55,718 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:26:55,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:26:55,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:26:55,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:26:55,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:26:55,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:26:55,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:26:55,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:26:55,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:26:55,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:26:55,721 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_cc81af74-e508-4d88-a479-74ee04d0b5a6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bc6a4fccf15f71e757bedea1c51d4def5df9848 [2020-11-29 20:26:56,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:26:56,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:26:56,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:26:56,068 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:26:56,070 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:26:56,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound10.c [2020-11-29 20:26:56,171 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/data/d0022809e/02d17ee50ae64bc3bf85bdd335356e13/FLAG9de117122 [2020-11-29 20:26:56,661 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:26:56,662 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound10.c [2020-11-29 20:26:56,669 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/data/d0022809e/02d17ee50ae64bc3bf85bdd335356e13/FLAG9de117122 [2020-11-29 20:26:57,022 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/data/d0022809e/02d17ee50ae64bc3bf85bdd335356e13 [2020-11-29 20:26:57,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:26:57,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:26:57,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:26:57,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:26:57,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:26:57,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:26:57" (1/1) ... [2020-11-29 20:26:57,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33404e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:57, skipping insertion in model container [2020-11-29 20:26:57,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:26:57" (1/1) ... [2020-11-29 20:26:57,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:26:57,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:26:57,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:26:57,313 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:26:57,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:26:57,351 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:26:57,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:57 WrapperNode [2020-11-29 20:26:57,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:26:57,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:26:57,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:26:57,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:26:57,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:57" (1/1) ... [2020-11-29 20:26:57,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:57" (1/1) ... [2020-11-29 20:26:57,416 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:26:57,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:26:57,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:26:57,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:26:57,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:57" (1/1) ... [2020-11-29 20:26:57,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:57" (1/1) ... [2020-11-29 20:26:57,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:57" (1/1) ... [2020-11-29 20:26:57,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:57" (1/1) ... [2020-11-29 20:26:57,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:57" (1/1) ... [2020-11-29 20:26:57,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:57" (1/1) ... [2020-11-29 20:26:57,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:57" (1/1) ... [2020-11-29 20:26:57,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:26:57,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:26:57,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:26:57,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:26:57,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/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 20:26:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 20:26:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:26:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:26:57,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:26:57,947 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:26:57,947 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-11-29 20:26:57,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:26:57 BoogieIcfgContainer [2020-11-29 20:26:57,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:26:57,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:26:57,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:26:57,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:26:57,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:26:57" (1/3) ... [2020-11-29 20:26:57,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c781c27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:26:57, skipping insertion in model container [2020-11-29 20:26:57,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:57" (2/3) ... [2020-11-29 20:26:57,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c781c27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:26:57, skipping insertion in model container [2020-11-29 20:26:57,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:26:57" (3/3) ... [2020-11-29 20:26:57,979 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound10.c [2020-11-29 20:26:57,992 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:26:57,998 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-29 20:26:58,012 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-29 20:26:58,042 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:26:58,042 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:26:58,042 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:26:58,043 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:26:58,043 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:26:58,043 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:26:58,043 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:26:58,044 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:26:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-11-29 20:26:58,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 20:26:58,067 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:58,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:58,068 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:58,075 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2020-11-29 20:26:58,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:26:58,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3283461] [2020-11-29 20:26:58,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:26:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:58,242 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 20:26:58,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3283461] [2020-11-29 20:26:58,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:26:58,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 20:26:58,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859663857] [2020-11-29 20:26:58,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 20:26:58,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:26:58,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 20:26:58,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:26:58,269 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-11-29 20:26:58,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:58,288 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-11-29 20:26:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 20:26:58,290 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-29 20:26:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:58,300 INFO L225 Difference]: With dead ends: 39 [2020-11-29 20:26:58,300 INFO L226 Difference]: Without dead ends: 17 [2020-11-29 20:26:58,304 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 20:26:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-29 20:26:58,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-29 20:26:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 20:26:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-29 20:26:58,353 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2020-11-29 20:26:58,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:58,354 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-29 20:26:58,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 20:26:58,354 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-29 20:26:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 20:26:58,355 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:58,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:58,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:26:58,356 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:58,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2020-11-29 20:26:58,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:26:58,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359233663] [2020-11-29 20:26:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:26:58,386 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:26:58,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824643013] [2020-11-29 20:26:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/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 20:26:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:58,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 20:26:58,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:26:58,609 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 20:26:58,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:26:58,748 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 20:26:58,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359233663] [2020-11-29 20:26:58,749 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:26:58,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824643013] [2020-11-29 20:26:58,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:26:58,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 20:26:58,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158736133] [2020-11-29 20:26:58,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:26:58,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:26:58,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:26:58,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:26:58,753 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2020-11-29 20:26:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:59,155 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-11-29 20:26:59,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:26:59,157 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-29 20:26:59,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:59,157 INFO L225 Difference]: With dead ends: 29 [2020-11-29 20:26:59,158 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 20:26:59,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:26:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 20:26:59,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-11-29 20:26:59,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 20:26:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-29 20:26:59,172 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2020-11-29 20:26:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:59,173 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-29 20:26:59,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:26:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-29 20:26:59,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:26:59,175 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:59,175 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:59,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 20:26:59,395 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:59,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:59,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1122200418, now seen corresponding path program 1 times [2020-11-29 20:26:59,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:26:59,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682239613] [2020-11-29 20:26:59,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:26:59,430 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:26:59,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011526447] [2020-11-29 20:26:59,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/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 20:26:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:59,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 20:26:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:26:59,547 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 20:26:59,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:26:59,631 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 20:26:59,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:26:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:59,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682239613] [2020-11-29 20:26:59,833 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:26:59,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011526447] [2020-11-29 20:26:59,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:26:59,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-29 20:26:59,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521709968] [2020-11-29 20:26:59,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 20:26:59,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:26:59,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 20:26:59,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:26:59,836 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-11-29 20:27:00,127 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-11-29 20:27:05,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:05,668 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-11-29 20:27:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:27:05,669 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-29 20:27:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:05,670 INFO L225 Difference]: With dead ends: 35 [2020-11-29 20:27:05,670 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 20:27:05,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:27:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 20:27:05,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2020-11-29 20:27:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 20:27:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-29 20:27:05,679 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2020-11-29 20:27:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:05,679 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-29 20:27:05,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 20:27:05,680 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-29 20:27:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:27:05,680 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:05,680 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:05,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:05,882 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:05,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:05,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1120353376, now seen corresponding path program 1 times [2020-11-29 20:27:05,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:05,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344557359] [2020-11-29 20:27:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:05,921 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:05,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818237853] [2020-11-29 20:27:05,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/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 20:27:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:27:05,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 20:27:05,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:27:06,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344557359] [2020-11-29 20:27:06,107 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:06,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818237853] [2020-11-29 20:27:06,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:06,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-29 20:27:06,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731520247] [2020-11-29 20:27:06,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:27:06,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:06,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:27:06,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:27:06,110 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-11-29 20:27:06,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:06,311 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-11-29 20:27:06,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:27:06,311 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-29 20:27:06,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:06,312 INFO L225 Difference]: With dead ends: 37 [2020-11-29 20:27:06,313 INFO L226 Difference]: Without dead ends: 35 [2020-11-29 20:27:06,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:27:06,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-29 20:27:06,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2020-11-29 20:27:06,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 20:27:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-29 20:27:06,324 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2020-11-29 20:27:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:06,325 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-29 20:27:06,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:27:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-29 20:27:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 20:27:06,327 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:06,327 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:06,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:06,541 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:06,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:06,542 INFO L82 PathProgramCache]: Analyzing trace with hash 558640405, now seen corresponding path program 1 times [2020-11-29 20:27:06,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:06,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788418585] [2020-11-29 20:27:06,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:06,566 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:06,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292785796] [2020-11-29 20:27:06,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/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 20:27:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:27:06,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 20:27:06,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:06,695 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 20:27:06,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:27:06,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788418585] [2020-11-29 20:27:06,897 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:06,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292785796] [2020-11-29 20:27:06,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:06,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 20:27:06,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638177753] [2020-11-29 20:27:06,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:27:06,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:06,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:27:06,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:27:06,900 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-11-29 20:27:07,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:07,289 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-11-29 20:27:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:27:07,292 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-11-29 20:27:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:07,292 INFO L225 Difference]: With dead ends: 34 [2020-11-29 20:27:07,292 INFO L226 Difference]: Without dead ends: 30 [2020-11-29 20:27:07,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:27:07,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-29 20:27:07,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-11-29 20:27:07,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 20:27:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-29 20:27:07,299 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 17 [2020-11-29 20:27:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:07,299 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-29 20:27:07,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:27:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-11-29 20:27:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 20:27:07,300 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:07,300 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:07,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:07,526 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:07,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:07,527 INFO L82 PathProgramCache]: Analyzing trace with hash -250706221, now seen corresponding path program 1 times [2020-11-29 20:27:07,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:07,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805537741] [2020-11-29 20:27:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:07,546 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:07,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173907976] [2020-11-29 20:27:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/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 20:27:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:27:07,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 20:27:07,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:07,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:07,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:27:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:27:07,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805537741] [2020-11-29 20:27:07,905 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:07,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173907976] [2020-11-29 20:27:07,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:07,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 20:27:07,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204176449] [2020-11-29 20:27:07,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:27:07,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:07,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:27:07,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:27:07,907 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-11-29 20:27:08,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:08,154 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-11-29 20:27:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 20:27:08,154 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-11-29 20:27:08,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:08,155 INFO L225 Difference]: With dead ends: 36 [2020-11-29 20:27:08,155 INFO L226 Difference]: Without dead ends: 32 [2020-11-29 20:27:08,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:27:08,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-29 20:27:08,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-11-29 20:27:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-29 20:27:08,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-29 20:27:08,162 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-11-29 20:27:08,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:08,162 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-29 20:27:08,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:27:08,163 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-29 20:27:08,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 20:27:08,163 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:08,163 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:08,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 20:27:08,378 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:08,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:08,379 INFO L82 PathProgramCache]: Analyzing trace with hash 32148948, now seen corresponding path program 2 times [2020-11-29 20:27:08,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:08,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899144525] [2020-11-29 20:27:08,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:08,390 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:08,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676565095] [2020-11-29 20:27:08,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/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 20:27:08,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:27:08,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:27:08,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 20:27:08,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:08,542 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 20:27:08,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:08,597 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 20:27:08,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:27:08,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899144525] [2020-11-29 20:27:08,828 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:08,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676565095] [2020-11-29 20:27:08,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:08,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-29 20:27:08,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219468625] [2020-11-29 20:27:08,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 20:27:08,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:08,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 20:27:08,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:27:08,831 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 12 states. [2020-11-29 20:27:09,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:09,618 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-11-29 20:27:09,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:27:09,618 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-11-29 20:27:09,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:09,619 INFO L225 Difference]: With dead ends: 43 [2020-11-29 20:27:09,619 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 20:27:09,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2020-11-29 20:27:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 20:27:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-11-29 20:27:09,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 20:27:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-11-29 20:27:09,627 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2020-11-29 20:27:09,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:09,627 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-11-29 20:27:09,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 20:27:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-11-29 20:27:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 20:27:09,628 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:09,628 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:09,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:09,832 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:09,832 INFO L82 PathProgramCache]: Analyzing trace with hash 33995990, now seen corresponding path program 1 times [2020-11-29 20:27:09,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:09,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601790971] [2020-11-29 20:27:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:09,846 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:09,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469561689] [2020-11-29 20:27:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/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 20:27:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:27:09,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 20:27:09,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:27:10,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601790971] [2020-11-29 20:27:10,022 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:10,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469561689] [2020-11-29 20:27:10,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:10,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 20:27:10,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907410493] [2020-11-29 20:27:10,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:27:10,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:10,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:27:10,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:27:10,024 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-11-29 20:27:10,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:10,301 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-11-29 20:27:10,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 20:27:10,304 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-29 20:27:10,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:10,304 INFO L225 Difference]: With dead ends: 48 [2020-11-29 20:27:10,305 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 20:27:10,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:27:10,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 20:27:10,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-11-29 20:27:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-29 20:27:10,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-11-29 20:27:10,323 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19 [2020-11-29 20:27:10,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:10,328 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-11-29 20:27:10,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:27:10,329 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-11-29 20:27:10,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 20:27:10,330 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:10,330 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:10,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:10,546 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:10,547 INFO L82 PathProgramCache]: Analyzing trace with hash -360878062, now seen corresponding path program 2 times [2020-11-29 20:27:10,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:10,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284133233] [2020-11-29 20:27:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:10,561 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:10,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737257376] [2020-11-29 20:27:10,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/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 20:27:10,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:27:10,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:27:10,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-29 20:27:10,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:27:10,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284133233] [2020-11-29 20:27:10,849 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:10,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737257376] [2020-11-29 20:27:10,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:10,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 20:27:10,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146706666] [2020-11-29 20:27:10,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:27:10,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:10,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:27:10,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:27:10,851 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 9 states. [2020-11-29 20:27:11,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:11,173 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-11-29 20:27:11,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:27:11,174 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-11-29 20:27:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:11,175 INFO L225 Difference]: With dead ends: 53 [2020-11-29 20:27:11,175 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 20:27:11,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:27:11,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 20:27:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-11-29 20:27:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 20:27:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-29 20:27:11,197 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 19 [2020-11-29 20:27:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:11,199 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-29 20:27:11,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:27:11,199 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-29 20:27:11,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 20:27:11,201 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:11,202 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:11,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 20:27:11,418 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:11,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:11,419 INFO L82 PathProgramCache]: Analyzing trace with hash -359031020, now seen corresponding path program 2 times [2020-11-29 20:27:11,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:11,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106206675] [2020-11-29 20:27:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:11,433 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:11,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776257874] [2020-11-29 20:27:11,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/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 20:27:11,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:27:11,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:27:11,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 20:27:11,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:27:11,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106206675] [2020-11-29 20:27:11,673 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:11,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776257874] [2020-11-29 20:27:11,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:11,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 20:27:11,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010655794] [2020-11-29 20:27:11,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:27:11,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:11,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:27:11,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:27:11,675 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 9 states. [2020-11-29 20:27:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:12,049 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-11-29 20:27:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:27:12,050 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-11-29 20:27:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:12,050 INFO L225 Difference]: With dead ends: 56 [2020-11-29 20:27:12,050 INFO L226 Difference]: Without dead ends: 54 [2020-11-29 20:27:12,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-11-29 20:27:12,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-29 20:27:12,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-11-29 20:27:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 20:27:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-29 20:27:12,061 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 19 [2020-11-29 20:27:12,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:12,061 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-29 20:27:12,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:27:12,061 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-29 20:27:12,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 20:27:12,062 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:12,062 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:12,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:12,282 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:12,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:12,283 INFO L82 PathProgramCache]: Analyzing trace with hash -609342175, now seen corresponding path program 1 times [2020-11-29 20:27:12,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:12,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212509584] [2020-11-29 20:27:12,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:12,295 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:12,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545006006] [2020-11-29 20:27:12,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:27:12,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 20:27:12,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:27:12,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212509584] [2020-11-29 20:27:12,539 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:12,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545006006] [2020-11-29 20:27:12,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:12,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 20:27:12,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451448079] [2020-11-29 20:27:12,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:27:12,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:12,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:27:12,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:27:12,541 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 7 states. [2020-11-29 20:27:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:12,718 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-11-29 20:27:12,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:27:12,720 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-11-29 20:27:12,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:12,721 INFO L225 Difference]: With dead ends: 53 [2020-11-29 20:27:12,721 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 20:27:12,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:27:12,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 20:27:12,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-11-29 20:27:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 20:27:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-29 20:27:12,734 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 22 [2020-11-29 20:27:12,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:12,736 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-29 20:27:12,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:27:12,736 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-29 20:27:12,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 20:27:12,736 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:12,737 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:12,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:12,953 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:12,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1418688801, now seen corresponding path program 2 times [2020-11-29 20:27:12,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:12,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983407152] [2020-11-29 20:27:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:12,963 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:12,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31176735] [2020-11-29 20:27:12,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:13,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:27:13,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:27:13,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 20:27:13,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:13,241 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 20:27:13,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:13,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:13,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:27:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:27:13,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983407152] [2020-11-29 20:27:13,366 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:13,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31176735] [2020-11-29 20:27:13,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:13,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-29 20:27:13,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304183710] [2020-11-29 20:27:13,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 20:27:13,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:13,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 20:27:13,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:27:13,369 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 12 states. [2020-11-29 20:27:13,786 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-11-29 20:27:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:13,900 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-11-29 20:27:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:27:13,900 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-11-29 20:27:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:13,901 INFO L225 Difference]: With dead ends: 53 [2020-11-29 20:27:13,901 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 20:27:13,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-11-29 20:27:13,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 20:27:13,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-11-29 20:27:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 20:27:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-29 20:27:13,911 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 22 [2020-11-29 20:27:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:13,912 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-29 20:27:13,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 20:27:13,912 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-29 20:27:13,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 20:27:13,913 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:13,913 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:14,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-29 20:27:14,126 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:14,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:14,127 INFO L82 PathProgramCache]: Analyzing trace with hash -132782498, now seen corresponding path program 3 times [2020-11-29 20:27:14,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:14,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219239910] [2020-11-29 20:27:14,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:14,157 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:14,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326317018] [2020-11-29 20:27:14,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:14,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 20:27:14,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:27:14,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-29 20:27:14,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:14,418 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 20:27:14,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:14,461 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 20:27:14,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:14,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:14,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:14,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:14,692 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 6, 1] term [2020-11-29 20:27:14,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:15,091 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-11-29 20:27:15,095 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 7, 1] term [2020-11-29 20:27:15,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:15,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:15,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:15,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:15,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:15,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:15,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:15,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:15,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:27:15,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219239910] [2020-11-29 20:27:15,578 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:15,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326317018] [2020-11-29 20:27:15,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:15,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-29 20:27:15,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150470663] [2020-11-29 20:27:15,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 20:27:15,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:15,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 20:27:15,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:27:15,581 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 14 states. [2020-11-29 20:27:15,846 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2020-11-29 20:27:16,058 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-11-29 20:27:16,242 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-11-29 20:27:17,643 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2020-11-29 20:27:18,116 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2020-11-29 20:27:19,664 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2020-11-29 20:27:19,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:19,731 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-11-29 20:27:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 20:27:19,731 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-11-29 20:27:19,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:19,732 INFO L225 Difference]: With dead ends: 57 [2020-11-29 20:27:19,732 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 20:27:19,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2020-11-29 20:27:19,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 20:27:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-11-29 20:27:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 20:27:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-11-29 20:27:19,746 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2020-11-29 20:27:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:19,747 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-11-29 20:27:19,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 20:27:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-11-29 20:27:19,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 20:27:19,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:19,748 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:19,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 20:27:19,974 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:19,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:19,975 INFO L82 PathProgramCache]: Analyzing trace with hash -130935456, now seen corresponding path program 3 times [2020-11-29 20:27:19,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:19,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958778431] [2020-11-29 20:27:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:19,985 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:19,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549450706] [2020-11-29 20:27:19,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:20,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 20:27:20,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:27:20,061 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 49 conjunts are in the unsatisfiable core [2020-11-29 20:27:20,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:20,090 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 20:27:20,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:20,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:20,275 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-11-29 20:27:20,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:20,367 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 20:27:20,367 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:20,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:20,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:27:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:27:20,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958778431] [2020-11-29 20:27:20,710 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:20,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549450706] [2020-11-29 20:27:20,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:20,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 20:27:20,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985829988] [2020-11-29 20:27:20,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 20:27:20,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 20:27:20,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:27:20,711 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 13 states. [2020-11-29 20:27:21,312 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2020-11-29 20:27:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:21,672 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-11-29 20:27:21,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 20:27:21,673 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-11-29 20:27:21,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:21,674 INFO L225 Difference]: With dead ends: 58 [2020-11-29 20:27:21,674 INFO L226 Difference]: Without dead ends: 52 [2020-11-29 20:27:21,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-29 20:27:21,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-29 20:27:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-11-29 20:27:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 20:27:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-11-29 20:27:21,698 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2020-11-29 20:27:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:21,698 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-11-29 20:27:21,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 20:27:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-11-29 20:27:21,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 20:27:21,706 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:21,707 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:21,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 20:27:21,934 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:21,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:21,935 INFO L82 PathProgramCache]: Analyzing trace with hash -525809508, now seen corresponding path program 4 times [2020-11-29 20:27:21,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:21,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210469259] [2020-11-29 20:27:21,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:21,946 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:21,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395913701] [2020-11-29 20:27:21,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:22,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:27:22,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:27:22,025 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 56 conjunts are in the unsatisfiable core [2020-11-29 20:27:22,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:22,473 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2020-11-29 20:27:22,708 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-11-29 20:27:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:27:22,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210469259] [2020-11-29 20:27:22,786 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:22,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395913701] [2020-11-29 20:27:22,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:22,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 20:27:22,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197430836] [2020-11-29 20:27:22,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 20:27:22,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:22,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 20:27:22,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:27:22,788 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 13 states. [2020-11-29 20:27:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:23,346 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-11-29 20:27:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:27:23,346 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-11-29 20:27:23,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:23,347 INFO L225 Difference]: With dead ends: 60 [2020-11-29 20:27:23,347 INFO L226 Difference]: Without dead ends: 54 [2020-11-29 20:27:23,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-11-29 20:27:23,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-29 20:27:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2020-11-29 20:27:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 20:27:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-11-29 20:27:23,358 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2020-11-29 20:27:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:23,358 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-11-29 20:27:23,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 20:27:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-11-29 20:27:23,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 20:27:23,359 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:23,359 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:23,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:23,560 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:23,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1412646176, now seen corresponding path program 5 times [2020-11-29 20:27:23,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:23,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380892868] [2020-11-29 20:27:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:23,566 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:23,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528295769] [2020-11-29 20:27:23,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:23,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-29 20:27:23,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:27:23,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 20:27:23,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:27:23,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380892868] [2020-11-29 20:27:23,774 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:23,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528295769] [2020-11-29 20:27:23,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:23,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 20:27:23,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455723151] [2020-11-29 20:27:23,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:27:23,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:23,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:27:23,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:27:23,776 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 5 states. [2020-11-29 20:27:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:24,313 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-11-29 20:27:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:27:24,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-11-29 20:27:24,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:24,314 INFO L225 Difference]: With dead ends: 61 [2020-11-29 20:27:24,315 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 20:27:24,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:27:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 20:27:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-29 20:27:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-29 20:27:24,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-11-29 20:27:24,344 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 24 [2020-11-29 20:27:24,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:24,345 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-11-29 20:27:24,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:27:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-11-29 20:27:24,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 20:27:24,351 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:24,352 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:24,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 20:27:24,578 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:24,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:24,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1410799134, now seen corresponding path program 6 times [2020-11-29 20:27:24,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:24,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145674866] [2020-11-29 20:27:24,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:24,587 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:24,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131725786] [2020-11-29 20:27:24,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:24,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-29 20:27:24,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:27:24,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 20:27:24,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:27:24,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145674866] [2020-11-29 20:27:24,926 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:24,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131725786] [2020-11-29 20:27:24,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:24,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-29 20:27:24,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370660574] [2020-11-29 20:27:24,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 20:27:24,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:24,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 20:27:24,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:27:24,928 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 10 states. [2020-11-29 20:27:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:25,526 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-11-29 20:27:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 20:27:25,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-11-29 20:27:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:25,529 INFO L225 Difference]: With dead ends: 65 [2020-11-29 20:27:25,529 INFO L226 Difference]: Without dead ends: 63 [2020-11-29 20:27:25,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-11-29 20:27:25,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-29 20:27:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2020-11-29 20:27:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-29 20:27:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-11-29 20:27:25,551 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 24 [2020-11-29 20:27:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:25,551 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-11-29 20:27:25,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 20:27:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-11-29 20:27:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 20:27:25,552 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:25,553 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:25,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 20:27:25,778 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:25,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:25,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1805673186, now seen corresponding path program 7 times [2020-11-29 20:27:25,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:25,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869776041] [2020-11-29 20:27:25,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:25,787 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:25,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312753687] [2020-11-29 20:27:25,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:27:25,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-29 20:27:25,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:25,859 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 20:27:25,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:26,086 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-11-29 20:27:26,087 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 20:27:26,088 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:26,302 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-11-29 20:27:26,793 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-29 20:27:26,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:26,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:27,004 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2020-11-29 20:27:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:27:27,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869776041] [2020-11-29 20:27:27,145 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:27,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312753687] [2020-11-29 20:27:27,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:27,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-29 20:27:27,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515029117] [2020-11-29 20:27:27,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 20:27:27,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:27,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 20:27:27,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:27:27,150 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 12 states. [2020-11-29 20:27:28,704 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-11-29 20:27:29,458 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2020-11-29 20:27:29,914 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-11-29 20:27:31,218 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-11-29 20:27:32,316 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2020-11-29 20:27:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:33,670 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-11-29 20:27:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:27:33,671 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-11-29 20:27:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:33,671 INFO L225 Difference]: With dead ends: 71 [2020-11-29 20:27:33,671 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 20:27:33,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:27:33,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 20:27:33,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2020-11-29 20:27:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-29 20:27:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-11-29 20:27:33,691 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 24 [2020-11-29 20:27:33,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:33,692 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-11-29 20:27:33,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 20:27:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-11-29 20:27:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 20:27:33,693 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:33,693 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:33,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 20:27:33,918 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:33,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:33,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1803826144, now seen corresponding path program 3 times [2020-11-29 20:27:33,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:33,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301843552] [2020-11-29 20:27:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:33,928 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:33,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387125698] [2020-11-29 20:27:33,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:47,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 20:27:47,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:27:47,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-29 20:27:47,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:47,681 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 20:27:47,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:47,716 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 20:27:47,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:47,911 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-11-29 20:27:47,912 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 20:27:47,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:48,077 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-11-29 20:27:48,372 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-11-29 20:27:48,785 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-11-29 20:27:49,006 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-11-29 20:27:49,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:49,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:27:49,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:27:49,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:27:49,040 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:27:49,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:27:49,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:27:49,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:27:49,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:27:49,622 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-11-29 20:27:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:27:49,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301843552] [2020-11-29 20:27:49,649 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:27:49,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387125698] [2020-11-29 20:27:49,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:27:49,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 20:27:49,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259895698] [2020-11-29 20:27:49,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 20:27:49,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:49,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 20:27:49,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:27:49,651 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 13 states. [2020-11-29 20:27:50,327 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2020-11-29 20:27:51,145 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-11-29 20:27:52,092 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-11-29 20:27:53,555 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-11-29 20:27:55,664 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2020-11-29 20:27:56,359 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2020-11-29 20:27:59,212 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-11-29 20:27:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:59,216 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-11-29 20:27:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:27:59,217 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-11-29 20:27:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:59,217 INFO L225 Difference]: With dead ends: 58 [2020-11-29 20:27:59,217 INFO L226 Difference]: Without dead ends: 56 [2020-11-29 20:27:59,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:27:59,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-29 20:27:59,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2020-11-29 20:27:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 20:27:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-11-29 20:27:59,232 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 24 [2020-11-29 20:27:59,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:59,233 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-11-29 20:27:59,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 20:27:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-11-29 20:27:59,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 20:27:59,234 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:59,234 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:59,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:59,446 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:27:59,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:59,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1438818641, now seen corresponding path program 2 times [2020-11-29 20:27:59,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:59,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443963575] [2020-11-29 20:27:59,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:59,460 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:27:59,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548385984] [2020-11-29 20:27:59,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:59,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:27:59,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:27:59,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-29 20:27:59,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:28:00,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:01,204 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-11-29 20:28:01,208 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 7, 1] term [2020-11-29 20:28:01,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:01,525 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-11-29 20:28:02,262 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-11-29 20:28:02,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:28:02,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:02,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:02,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:02,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:02,290 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:02,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:02,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:02,511 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-11-29 20:28:02,813 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-29 20:28:02,937 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 1 [2020-11-29 20:28:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:28:03,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443963575] [2020-11-29 20:28:03,060 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:28:03,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548385984] [2020-11-29 20:28:03,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:28:03,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-29 20:28:03,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313658840] [2020-11-29 20:28:03,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 20:28:03,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:28:03,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 20:28:03,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:28:03,063 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 14 states. [2020-11-29 20:28:04,635 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-11-29 20:28:05,796 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-11-29 20:28:06,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:28:06,075 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-11-29 20:28:06,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 20:28:06,075 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-11-29 20:28:06,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:28:06,076 INFO L225 Difference]: With dead ends: 61 [2020-11-29 20:28:06,076 INFO L226 Difference]: Without dead ends: 57 [2020-11-29 20:28:06,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2020-11-29 20:28:06,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-29 20:28:06,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2020-11-29 20:28:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 20:28:06,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-11-29 20:28:06,089 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2020-11-29 20:28:06,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:28:06,089 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-11-29 20:28:06,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 20:28:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-11-29 20:28:06,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 20:28:06,090 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:28:06,090 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:28:06,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:28:06,298 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:28:06,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:28:06,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1661359253, now seen corresponding path program 3 times [2020-11-29 20:28:06,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:28:06,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528726354] [2020-11-29 20:28:06,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:28:06,305 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:28:06,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215546468] [2020-11-29 20:28:06,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:28:06,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 20:28:06,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:28:06,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 20:28:06,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:28:06,582 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 20:28:06,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:06,635 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 20:28:06,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:06,988 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-11-29 20:28:06,990 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 20:28:06,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:07,743 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-11-29 20:28:08,628 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-11-29 20:28:08,641 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:08,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:08,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:08,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:08,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:08,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:08,680 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:08,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:08,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:09,643 WARN L193 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 1 [2020-11-29 20:28:11,409 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2020-11-29 20:28:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 20:28:11,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528726354] [2020-11-29 20:28:11,630 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:28:11,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215546468] [2020-11-29 20:28:11,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:28:11,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-11-29 20:28:11,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253646865] [2020-11-29 20:28:11,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 20:28:11,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:28:11,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 20:28:11,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:28:11,633 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 13 states. [2020-11-29 20:28:13,317 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-11-29 20:28:18,441 WARN L193 SmtUtils]: Spent 5.01 s on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-11-29 20:28:21,433 WARN L193 SmtUtils]: Spent 2.94 s on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2020-11-29 20:28:29,511 WARN L193 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-11-29 20:28:31,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:28:31,951 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-11-29 20:28:31,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 20:28:31,951 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-11-29 20:28:31,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:28:31,952 INFO L225 Difference]: With dead ends: 67 [2020-11-29 20:28:31,952 INFO L226 Difference]: Without dead ends: 63 [2020-11-29 20:28:31,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-11-29 20:28:31,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-29 20:28:31,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2020-11-29 20:28:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 20:28:31,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-11-29 20:28:31,966 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2020-11-29 20:28:31,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:28:31,967 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-11-29 20:28:31,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 20:28:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-11-29 20:28:31,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 20:28:31,968 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:28:31,968 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:28:32,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-29 20:28:32,176 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:28:32,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:28:32,177 INFO L82 PathProgramCache]: Analyzing trace with hash 852012627, now seen corresponding path program 3 times [2020-11-29 20:28:32,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:28:32,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108914976] [2020-11-29 20:28:32,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:28:32,183 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:28:32,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296381834] [2020-11-29 20:28:32,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:28:32,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 20:28:32,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:28:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 20:28:32,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:28:32,536 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 20:28:32,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:32,828 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-11-29 20:28:32,830 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 20:28:32,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:33,104 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-11-29 20:28:33,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:28:33,115 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:28:35,132 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 30 DAG size of output: 1 [2020-11-29 20:28:36,966 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 29 DAG size of output: 13 [2020-11-29 20:28:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 20:28:37,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108914976] [2020-11-29 20:28:37,010 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:28:37,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296381834] [2020-11-29 20:28:37,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:28:37,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-29 20:28:37,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825441392] [2020-11-29 20:28:37,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 20:28:37,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:28:37,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 20:28:37,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:28:37,012 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 10 states. [2020-11-29 20:28:37,476 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-11-29 20:28:39,038 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-11-29 20:28:39,221 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-11-29 20:28:43,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:28:43,463 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-11-29 20:28:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 20:28:43,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-11-29 20:28:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:28:43,478 INFO L225 Difference]: With dead ends: 48 [2020-11-29 20:28:43,478 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 20:28:43,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-11-29 20:28:43,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 20:28:43,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 20:28:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 20:28:43,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 20:28:43,480 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-11-29 20:28:43,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:28:43,480 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 20:28:43,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 20:28:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 20:28:43,480 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 20:28:43,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-29 20:28:43,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 20:28:43,791 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 50 [2020-11-29 20:28:44,054 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 53 [2020-11-29 20:28:46,500 WARN L193 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-11-29 20:28:50,735 WARN L193 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-11-29 20:28:50,738 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-11-29 20:28:50,739 INFO L277 CegarLoopResult]: At program point L52(lines 21 53) the Hoare annotation is: true [2020-11-29 20:28:50,739 INFO L274 CegarLoopResult]: For program point L15(lines 15 16) no Hoare annotation was computed. [2020-11-29 20:28:50,739 INFO L274 CegarLoopResult]: For program point L15-1(lines 15 16) no Hoare annotation was computed. [2020-11-29 20:28:50,739 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-11-29 20:28:50,739 INFO L274 CegarLoopResult]: For program point L11-2(line 11) no Hoare annotation was computed. [2020-11-29 20:28:50,739 INFO L274 CegarLoopResult]: For program point L40(lines 40 45) no Hoare annotation was computed. [2020-11-29 20:28:50,739 INFO L274 CegarLoopResult]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2020-11-29 20:28:50,739 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 20:28:50,739 INFO L270 CegarLoopResult]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse3 (* 2 ULTIMATE.start_main_~Y~0))) (let ((.cse0 (<= ULTIMATE.start_main_~Y~0 10)) (.cse1 (<= .cse3 (+ ULTIMATE.start_main_~v~0 (* 2 ULTIMATE.start_main_~X~0)))) (.cse4 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse5 (<= 0 ULTIMATE.start_main_~Y~0)) (.cse6 (<= ULTIMATE.start_main_~X~0 10))) (or (let ((.cse2 (+ ULTIMATE.start_main_~v~0 ULTIMATE.start_main_~X~0))) (and .cse0 (= ULTIMATE.start_main_~x~0 0) .cse1 (<= .cse2 .cse3) (<= .cse3 .cse2) (= ULTIMATE.start_main_~y~0 0) .cse4 .cse5 .cse6)) (and (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1)) .cse0 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 0 ULTIMATE.start_main_~X~0) .cse1 (= (+ (* (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~Y~0) 2) (* ULTIMATE.start_main_~Y~0 2)) (+ ULTIMATE.start_main_~v~0 (* (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~X~0) 2) ULTIMATE.start_main_~X~0)) (<= (* 4 ULTIMATE.start_main_~Y~0) (+ ULTIMATE.start_main_~v~0 (* 4 ULTIMATE.start_main_~X~0))) .cse4 .cse5 .cse6)))) [2020-11-29 20:28:50,739 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 20:28:50,739 INFO L274 CegarLoopResult]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2020-11-29 20:28:50,740 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 20:28:50,740 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-11-29 20:28:50,740 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 20:28:50,740 INFO L274 CegarLoopResult]: For program point L14(lines 14 17) no Hoare annotation was computed. [2020-11-29 20:28:50,740 INFO L270 CegarLoopResult]: At program point L14-1(lines 36 37) the Hoare annotation is: (let ((.cse7 (* 2 ULTIMATE.start_main_~Y~0))) (let ((.cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse1 (<= ULTIMATE.start_main_~Y~0 10)) (.cse2 (<= .cse7 (+ ULTIMATE.start_main_~v~0 (* 2 ULTIMATE.start_main_~X~0)))) (.cse3 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse4 (<= 0 ULTIMATE.start_main_~Y~0)) (.cse5 (<= ULTIMATE.start_main_~X~0 10))) (or (and .cse0 (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1)) .cse1 (<= 0 ULTIMATE.start_main_~X~0) .cse2 (= (+ (* (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~Y~0) 2) (* ULTIMATE.start_main_~Y~0 2)) (+ ULTIMATE.start_main_~v~0 (* (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~X~0) 2) ULTIMATE.start_main_~X~0)) (<= (* 4 ULTIMATE.start_main_~Y~0) (+ ULTIMATE.start_main_~v~0 (* 4 ULTIMATE.start_main_~X~0))) .cse3 .cse4 .cse5) (let ((.cse6 (+ ULTIMATE.start_main_~v~0 ULTIMATE.start_main_~X~0))) (and .cse0 .cse1 (= ULTIMATE.start_main_~x~0 0) .cse2 (<= .cse6 .cse7) (<= .cse7 .cse6) (= ULTIMATE.start_main_~y~0 0) .cse3 .cse4 .cse5))))) [2020-11-29 20:28:50,740 INFO L274 CegarLoopResult]: For program point L14-2(lines 14 17) no Hoare annotation was computed. [2020-11-29 20:28:50,740 INFO L277 CegarLoopResult]: At program point L14-3(lines 13 19) the Hoare annotation is: true [2020-11-29 20:28:50,740 INFO L274 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-11-29 20:28:50,740 INFO L274 CegarLoopResult]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2020-11-29 20:28:50,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:28:50 BoogieIcfgContainer [2020-11-29 20:28:50,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:28:50,760 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:28:50,760 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:28:50,760 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:28:50,761 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:26:57" (3/4) ... [2020-11-29 20:28:50,765 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 20:28:50,777 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-29 20:28:50,777 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 20:28:50,778 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 20:28:50,779 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 20:28:50,823 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cc81af74-e508-4d88-a479-74ee04d0b5a6/bin/uautomizer/witness.graphml [2020-11-29 20:28:50,823 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:28:50,824 INFO L168 Benchmark]: Toolchain (without parser) took 113797.19 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 56.5 MB in the beginning and 128.3 MB in the end (delta: -71.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:28:50,825 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 88.1 MB. Free memory was 47.6 MB in the beginning and 47.6 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:28:50,826 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.88 ms. Allocated memory is still 88.1 MB. Free memory was 56.2 MB in the beginning and 64.8 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 20:28:50,826 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.00 ms. Allocated memory is still 88.1 MB. Free memory was 64.8 MB in the beginning and 63.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:28:50,827 INFO L168 Benchmark]: Boogie Preprocessor took 56.95 ms. Allocated memory is still 88.1 MB. Free memory was 63.3 MB in the beginning and 62.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:28:50,827 INFO L168 Benchmark]: RCFGBuilder took 468.15 ms. Allocated memory is still 88.1 MB. Free memory was 62.2 MB in the beginning and 49.1 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 20:28:50,828 INFO L168 Benchmark]: TraceAbstraction took 112789.09 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 48.8 MB in the beginning and 131.4 MB in the end (delta: -82.7 MB). Peak memory consumption was 79.2 MB. Max. memory is 16.1 GB. [2020-11-29 20:28:50,828 INFO L168 Benchmark]: Witness Printer took 63.53 ms. Allocated memory is still 157.3 MB. Free memory was 131.4 MB in the beginning and 128.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:28:50,831 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 88.1 MB. Free memory was 47.6 MB in the beginning and 47.6 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 322.88 ms. Allocated memory is still 88.1 MB. Free memory was 56.2 MB in the beginning and 64.8 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.00 ms. Allocated memory is still 88.1 MB. Free memory was 64.8 MB in the beginning and 63.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.95 ms. Allocated memory is still 88.1 MB. Free memory was 63.3 MB in the beginning and 62.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 468.15 ms. Allocated memory is still 88.1 MB. Free memory was 62.2 MB in the beginning and 49.1 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 112789.09 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 48.8 MB in the beginning and 131.4 MB in the end (delta: -82.7 MB). Peak memory consumption was 79.2 MB. Max. memory is 16.1 GB. * Witness Printer took 63.53 ms. Allocated memory is still 157.3 MB. Free memory was 131.4 MB in the beginning and 128.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((((((1 == cond && x <= X + 1) && Y <= 10) && 0 <= X) && 2 * Y <= v + 2 * X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X) && 4 * Y <= v + 4 * X) && cond == 1) && 0 <= Y) && X <= 10) || (((((((((1 == cond && Y <= 10) && x == 0) && 2 * Y <= v + 2 * X) && v + X <= 2 * Y) && 2 * Y <= v + X) && y == 0) && cond == 1) && 0 <= Y) && X <= 10) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: ((((((((Y <= 10 && x == 0) && 2 * Y <= v + 2 * X) && v + X <= 2 * Y) && 2 * Y <= v + X) && y == 0) && cond == 1) && 0 <= Y) && X <= 10) || (((((((((x <= X + 1 && Y <= 10) && 1 <= cond) && 0 <= X) && 2 * Y <= v + 2 * X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X) && 4 * Y <= v + 4 * X) && cond == 1) && 0 <= Y) && X <= 10) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 105.6s, OverallIterations: 22, TraceHistogramMax: 4, AutomataDifference: 62.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 7.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 634 SDslu, 868 SDs, 0 SdLazy, 2513 SolverSat, 327 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 27.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 550 GetRequests, 246 SyntacticMatches, 5 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 44.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 22 MinimizatonAttempts, 150 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 22 NumberOfFragments, 211 HoareAnnotationTreeSize, 4 FomulaSimplifications, 7439668 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 4 FomulaSimplificationsInter, 152 FormulaSimplificationTreeSizeReductionInter, 6.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 14.9s SatisfiabilityAnalysisTime, 22.0s InterpolantComputationTime, 449 NumberOfCodeBlocks, 411 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 427 ConstructedInterpolants, 24 QuantifiedInterpolants, 138278 SizeOfPredicates, 267 NumberOfNonLiveVariables, 2038 ConjunctsInSsa, 621 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 97/287 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 correct! Received shutdown request...