./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/gcd_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/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 9c20edfd7ede05443471560aa2c7be34d4e8c171 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 16:05:16,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 16:05:16,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 16:05:16,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 16:05:16,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 16:05:16,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 16:05:16,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 16:05:16,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 16:05:16,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 16:05:16,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 16:05:16,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 16:05:16,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 16:05:16,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 16:05:16,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 16:05:16,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 16:05:16,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 16:05:16,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 16:05:16,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 16:05:16,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 16:05:16,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 16:05:16,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 16:05:16,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 16:05:16,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 16:05:16,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 16:05:16,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 16:05:16,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 16:05:16,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 16:05:16,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 16:05:16,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 16:05:16,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 16:05:16,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 16:05:16,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 16:05:16,769 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 16:05:16,770 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 16:05:16,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 16:05:16,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 16:05:16,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 16:05:16,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 16:05:16,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 16:05:16,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 16:05:16,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 16:05:16,775 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 16:05:16,803 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 16:05:16,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 16:05:16,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 16:05:16,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 16:05:16,805 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 16:05:16,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 16:05:16,806 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 16:05:16,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 16:05:16,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 16:05:16,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 16:05:16,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 16:05:16,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 16:05:16,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 16:05:16,807 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 16:05:16,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 16:05:16,808 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 16:05:16,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 16:05:16,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 16:05:16,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 16:05:16,809 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 16:05:16,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 16:05:16,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 16:05:16,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 16:05:16,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 16:05:16,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 16:05:16,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 16:05:16,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 16:05:16,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 16:05:16,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 16:05:16,811 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_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c20edfd7ede05443471560aa2c7be34d4e8c171 [2020-12-01 16:05:17,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 16:05:17,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 16:05:17,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 16:05:17,129 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 16:05:17,130 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 16:05:17,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/bin/uautomizer/../../sv-benchmarks/c/bitvector/gcd_4.c [2020-12-01 16:05:17,242 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/bin/uautomizer/data/bbf14f678/e09553a82a7c4378ac48a3030613af1c/FLAG79e516bdd [2020-12-01 16:05:17,805 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 16:05:17,806 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/sv-benchmarks/c/bitvector/gcd_4.c [2020-12-01 16:05:17,819 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/bin/uautomizer/data/bbf14f678/e09553a82a7c4378ac48a3030613af1c/FLAG79e516bdd [2020-12-01 16:05:18,164 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/bin/uautomizer/data/bbf14f678/e09553a82a7c4378ac48a3030613af1c [2020-12-01 16:05:18,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 16:05:18,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 16:05:18,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 16:05:18,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 16:05:18,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 16:05:18,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 04:05:18" (1/1) ... [2020-12-01 16:05:18,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d51af63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:05:18, skipping insertion in model container [2020-12-01 16:05:18,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 04:05:18" (1/1) ... [2020-12-01 16:05:18,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 16:05:18,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 16:05:18,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 16:05:18,462 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 16:05:18,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 16:05:18,512 INFO L208 MainTranslator]: Completed translation [2020-12-01 16:05:18,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:05:18 WrapperNode [2020-12-01 16:05:18,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 16:05:18,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 16:05:18,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 16:05:18,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 16:05:18,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:05:18" (1/1) ... [2020-12-01 16:05:18,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:05:18" (1/1) ... [2020-12-01 16:05:18,569 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 16:05:18,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 16:05:18,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 16:05:18,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 16:05:18,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:05:18" (1/1) ... [2020-12-01 16:05:18,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:05:18" (1/1) ... [2020-12-01 16:05:18,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:05:18" (1/1) ... [2020-12-01 16:05:18,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:05:18" (1/1) ... [2020-12-01 16:05:18,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:05:18" (1/1) ... [2020-12-01 16:05:18,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:05:18" (1/1) ... [2020-12-01 16:05:18,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:05:18" (1/1) ... [2020-12-01 16:05:18,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 16:05:18,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 16:05:18,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 16:05:18,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 16:05:18,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:05:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/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 [2020-12-01 16:05:18,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 16:05:18,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 16:05:18,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 16:05:18,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 16:05:18,930 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 16:05:18,931 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-01 16:05:18,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:05:18 BoogieIcfgContainer [2020-12-01 16:05:18,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 16:05:18,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 16:05:18,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 16:05:18,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 16:05:18,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 04:05:18" (1/3) ... [2020-12-01 16:05:18,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bde01c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 04:05:18, skipping insertion in model container [2020-12-01 16:05:18,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:05:18" (2/3) ... [2020-12-01 16:05:18,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bde01c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 04:05:18, skipping insertion in model container [2020-12-01 16:05:18,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:05:18" (3/3) ... [2020-12-01 16:05:18,943 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2020-12-01 16:05:18,973 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 16:05:18,987 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-01 16:05:19,008 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-01 16:05:19,035 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 16:05:19,036 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 16:05:19,036 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 16:05:19,036 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 16:05:19,036 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 16:05:19,036 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 16:05:19,037 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 16:05:19,053 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 16:05:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-01 16:05:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-01 16:05:19,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 16:05:19,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 16:05:19,106 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 16:05:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:05:19,112 INFO L82 PathProgramCache]: Analyzing trace with hash 121403650, now seen corresponding path program 1 times [2020-12-01 16:05:19,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:05:19,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185297419] [2020-12-01 16:05:19,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:05:19,223 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 16:05:19,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210096134] [2020-12-01 16:05:19,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/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 [2020-12-01 16:05:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:05:19,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-01 16:05:19,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 16:05:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:05:19,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185297419] [2020-12-01 16:05:19,493 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 16:05:19,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210096134] [2020-12-01 16:05:19,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 16:05:19,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 16:05:19,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383252624] [2020-12-01 16:05:19,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 16:05:19,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 16:05:19,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 16:05:19,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 16:05:19,531 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-12-01 16:05:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 16:05:19,601 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2020-12-01 16:05:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 16:05:19,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-01 16:05:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 16:05:19,614 INFO L225 Difference]: With dead ends: 67 [2020-12-01 16:05:19,615 INFO L226 Difference]: Without dead ends: 35 [2020-12-01 16:05:19,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 16:05:19,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-01 16:05:19,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2020-12-01 16:05:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-01 16:05:19,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-01 16:05:19,650 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 8 [2020-12-01 16:05:19,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 16:05:19,650 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-01 16:05:19,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 16:05:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-01 16:05:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 16:05:19,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 16:05:19,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 16:05:19,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-01 16:05:19,865 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 16:05:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:05:19,866 INFO L82 PathProgramCache]: Analyzing trace with hash -60379342, now seen corresponding path program 1 times [2020-12-01 16:05:19,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:05:19,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166475827] [2020-12-01 16:05:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:05:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:05:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:05:19,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166475827] [2020-12-01 16:05:19,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 16:05:19,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 16:05:19,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312411579] [2020-12-01 16:05:19,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 16:05:19,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 16:05:19,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 16:05:19,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 16:05:19,945 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 3 states. [2020-12-01 16:05:19,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 16:05:19,966 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-01 16:05:19,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 16:05:19,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-01 16:05:19,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 16:05:19,968 INFO L225 Difference]: With dead ends: 38 [2020-12-01 16:05:19,968 INFO L226 Difference]: Without dead ends: 22 [2020-12-01 16:05:19,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 16:05:19,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-01 16:05:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-01 16:05:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-01 16:05:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-01 16:05:19,975 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2020-12-01 16:05:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 16:05:19,975 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-01 16:05:19,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 16:05:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-01 16:05:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 16:05:19,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 16:05:19,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 16:05:19,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 16:05:19,977 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 16:05:19,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:05:19,978 INFO L82 PathProgramCache]: Analyzing trace with hash 108865487, now seen corresponding path program 1 times [2020-12-01 16:05:19,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:05:19,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315938400] [2020-12-01 16:05:19,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:05:19,997 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 16:05:19,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680962711] [2020-12-01 16:05:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/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 [2020-12-01 16:05:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:05:20,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 16:05:20,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 16:05:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:05:20,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315938400] [2020-12-01 16:05:20,140 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 16:05:20,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680962711] [2020-12-01 16:05:20,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 16:05:20,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-01 16:05:20,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127936508] [2020-12-01 16:05:20,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 16:05:20,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 16:05:20,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 16:05:20,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 16:05:20,144 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-12-01 16:05:20,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 16:05:20,176 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-12-01 16:05:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 16:05:20,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-01 16:05:20,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 16:05:20,178 INFO L225 Difference]: With dead ends: 39 [2020-12-01 16:05:20,178 INFO L226 Difference]: Without dead ends: 24 [2020-12-01 16:05:20,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 16:05:20,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-01 16:05:20,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-01 16:05:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-01 16:05:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-01 16:05:20,184 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12 [2020-12-01 16:05:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 16:05:20,184 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-01 16:05:20,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 16:05:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-01 16:05:20,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-01 16:05:20,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 16:05:20,186 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 16:05:20,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 16:05:20,410 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 16:05:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:05:20,410 INFO L82 PathProgramCache]: Analyzing trace with hash -326322836, now seen corresponding path program 1 times [2020-12-01 16:05:20,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:05:20,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951663986] [2020-12-01 16:05:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:05:20,427 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 16:05:20,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011277285] [2020-12-01 16:05:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/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 [2020-12-01 16:05:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:05:20,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-01 16:05:20,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 16:05:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:05:20,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951663986] [2020-12-01 16:05:20,596 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 16:05:20,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011277285] [2020-12-01 16:05:20,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 16:05:20,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-01 16:05:20,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854237204] [2020-12-01 16:05:20,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 16:05:20,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 16:05:20,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 16:05:20,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-01 16:05:20,599 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-12-01 16:05:20,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 16:05:20,678 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-12-01 16:05:20,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 16:05:20,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-01 16:05:20,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 16:05:20,682 INFO L225 Difference]: With dead ends: 41 [2020-12-01 16:05:20,682 INFO L226 Difference]: Without dead ends: 26 [2020-12-01 16:05:20,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-01 16:05:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-01 16:05:20,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-01 16:05:20,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-01 16:05:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-01 16:05:20,701 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2020-12-01 16:05:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 16:05:20,702 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-01 16:05:20,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 16:05:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-01 16:05:20,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-01 16:05:20,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 16:05:20,703 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 16:05:20,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 16:05:20,909 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 16:05:20,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:05:20,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1930473527, now seen corresponding path program 2 times [2020-12-01 16:05:20,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:05:20,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396238786] [2020-12-01 16:05:20,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:05:20,924 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 16:05:20,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173528551] [2020-12-01 16:05:20,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/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 [2020-12-01 16:05:21,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 16:05:21,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 16:05:21,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-01 16:05:21,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 16:05:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:05:21,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396238786] [2020-12-01 16:05:21,083 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 16:05:21,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173528551] [2020-12-01 16:05:21,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 16:05:21,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-01 16:05:21,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828241684] [2020-12-01 16:05:21,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 16:05:21,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 16:05:21,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 16:05:21,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-01 16:05:21,086 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 6 states. [2020-12-01 16:05:21,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 16:05:21,177 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-12-01 16:05:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 16:05:21,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-01 16:05:21,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 16:05:21,179 INFO L225 Difference]: With dead ends: 43 [2020-12-01 16:05:21,179 INFO L226 Difference]: Without dead ends: 28 [2020-12-01 16:05:21,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-01 16:05:21,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-01 16:05:21,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-01 16:05:21,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-01 16:05:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-01 16:05:21,197 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2020-12-01 16:05:21,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 16:05:21,198 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-01 16:05:21,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 16:05:21,198 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-01 16:05:21,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-01 16:05:21,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 16:05:21,199 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 16:05:21,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 16:05:21,413 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 16:05:21,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:05:21,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1626028314, now seen corresponding path program 3 times [2020-12-01 16:05:21,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:05:21,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768147177] [2020-12-01 16:05:21,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:05:21,429 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 16:05:21,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28228386] [2020-12-01 16:05:21,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/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 [2020-12-01 16:05:21,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-01 16:05:21,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 16:05:21,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 16:05:21,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 16:05:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:05:21,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768147177] [2020-12-01 16:05:21,639 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 16:05:21,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28228386] [2020-12-01 16:05:21,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 16:05:21,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-01 16:05:21,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76473779] [2020-12-01 16:05:21,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 16:05:21,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 16:05:21,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 16:05:21,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-01 16:05:21,642 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-12-01 16:05:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 16:05:21,686 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-12-01 16:05:21,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 16:05:21,687 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-01 16:05:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 16:05:21,688 INFO L225 Difference]: With dead ends: 47 [2020-12-01 16:05:21,688 INFO L226 Difference]: Without dead ends: 30 [2020-12-01 16:05:21,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-01 16:05:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-01 16:05:21,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-01 16:05:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-01 16:05:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-01 16:05:21,693 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 18 [2020-12-01 16:05:21,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 16:05:21,694 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-01 16:05:21,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 16:05:21,694 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-01 16:05:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-01 16:05:21,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 16:05:21,695 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 16:05:21,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-01 16:05:21,921 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 16:05:21,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:05:21,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1921301375, now seen corresponding path program 4 times [2020-12-01 16:05:21,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:05:21,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130175356] [2020-12-01 16:05:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:05:21,936 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 16:05:21,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338767491] [2020-12-01 16:05:21,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/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 [2020-12-01 16:05:21,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 16:05:21,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 16:05:21,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-01 16:05:21,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 16:05:22,242 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 16:05:22,245 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 16:05:22,252 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 16:05:22,259 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 16:05:22,264 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 16:05:22,272 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 16:05:22,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-01 16:05:22,293 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 16:05:22,299 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-01 16:05:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:05:22,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130175356] [2020-12-01 16:05:22,335 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 16:05:22,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338767491] [2020-12-01 16:05:22,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 16:05:22,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-01 16:05:22,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832791557] [2020-12-01 16:05:22,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 16:05:22,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 16:05:22,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 16:05:22,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-12-01 16:05:22,337 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 11 states. [2020-12-01 16:05:22,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 16:05:22,746 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-12-01 16:05:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-01 16:05:22,747 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-12-01 16:05:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 16:05:22,749 INFO L225 Difference]: With dead ends: 59 [2020-12-01 16:05:22,749 INFO L226 Difference]: Without dead ends: 44 [2020-12-01 16:05:22,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-12-01 16:05:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-01 16:05:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-12-01 16:05:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-01 16:05:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-12-01 16:05:22,765 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 20 [2020-12-01 16:05:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 16:05:22,765 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-12-01 16:05:22,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 16:05:22,766 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-12-01 16:05:22,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 16:05:22,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 16:05:22,768 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 16:05:22,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 16:05:22,981 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 16:05:22,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:05:22,982 INFO L82 PathProgramCache]: Analyzing trace with hash 465533924, now seen corresponding path program 1 times [2020-12-01 16:05:22,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:05:22,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392286728] [2020-12-01 16:05:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:05:22,994 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 16:05:22,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242731257] [2020-12-01 16:05:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/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 [2020-12-01 16:05:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:05:23,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-01 16:05:23,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 16:05:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-01 16:05:23,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392286728] [2020-12-01 16:05:23,269 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 16:05:23,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242731257] [2020-12-01 16:05:23,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 16:05:23,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-01 16:05:23,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615992845] [2020-12-01 16:05:23,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 16:05:23,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 16:05:23,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 16:05:23,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-01 16:05:23,272 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2020-12-01 16:05:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 16:05:23,491 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-12-01 16:05:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 16:05:23,492 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-01 16:05:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 16:05:23,494 INFO L225 Difference]: With dead ends: 44 [2020-12-01 16:05:23,494 INFO L226 Difference]: Without dead ends: 32 [2020-12-01 16:05:23,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-01 16:05:23,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-01 16:05:23,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-01 16:05:23,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-01 16:05:23,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-01 16:05:23,504 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 22 [2020-12-01 16:05:23,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 16:05:23,504 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-01 16:05:23,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 16:05:23,504 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-01 16:05:23,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 16:05:23,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 16:05:23,507 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 16:05:23,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 16:05:23,733 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 16:05:23,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:05:23,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1401524834, now seen corresponding path program 5 times [2020-12-01 16:05:23,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:05:23,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178446270] [2020-12-01 16:05:23,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:05:23,746 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 16:05:23,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472311758] [2020-12-01 16:05:23,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/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 [2020-12-01 16:05:23,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-01 16:05:23,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 16:05:23,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-01 16:05:23,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 16:05:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:05:24,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178446270] [2020-12-01 16:05:24,119 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 16:05:24,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472311758] [2020-12-01 16:05:24,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 16:05:24,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-01 16:05:24,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964673803] [2020-12-01 16:05:24,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-01 16:05:24,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 16:05:24,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-01 16:05:24,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-01 16:05:24,128 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-12-01 16:05:24,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 16:05:24,225 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-01 16:05:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 16:05:24,226 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-01 16:05:24,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 16:05:24,227 INFO L225 Difference]: With dead ends: 32 [2020-12-01 16:05:24,227 INFO L226 Difference]: Without dead ends: 0 [2020-12-01 16:05:24,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-01 16:05:24,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-01 16:05:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-01 16:05:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-01 16:05:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-01 16:05:24,229 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-12-01 16:05:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 16:05:24,229 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 16:05:24,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-01 16:05:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-01 16:05:24,230 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-01 16:05:24,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-01 16:05:24,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-01 16:05:24,950 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-12-01 16:05:24,954 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-12-01 16:05:24,954 INFO L262 CegarLoopResult]: For program point L15-1(lines 13 29) no Hoare annotation was computed. [2020-12-01 16:05:24,954 INFO L262 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-12-01 16:05:24,955 INFO L258 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (let ((.cse0 (* 3 ULTIMATE.start_main_~y~0))) (and (= ULTIMATE.start_main_~x~0 (+ .cse0 ULTIMATE.start_gcd_test_~a)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~y~0 18) (= ULTIMATE.start_main_~x~0 (+ |ULTIMATE.start_gcd_test_#res| .cse0)) (= (+ ULTIMATE.start_main_~g~0 .cse0) 63) (= ULTIMATE.start_main_~x~0 63))) [2020-12-01 16:05:24,955 INFO L262 CegarLoopResult]: For program point L7-3(lines 7 9) no Hoare annotation was computed. [2020-12-01 16:05:24,955 INFO L262 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-12-01 16:05:24,955 INFO L262 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-12-01 16:05:24,956 INFO L258 CegarLoopResult]: At program point L7-5(lines 6 11) the Hoare annotation is: (let ((.cse0 (* 3 ULTIMATE.start_main_~y~0))) (and (= ULTIMATE.start_main_~x~0 (+ .cse0 ULTIMATE.start_gcd_test_~a)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~y~0 18) (= ULTIMATE.start_main_~x~0 (+ |ULTIMATE.start_gcd_test_#res| .cse0)) (= (+ ULTIMATE.start_main_~g~0 .cse0) 63) (= ULTIMATE.start_main_~x~0 63))) [2020-12-01 16:05:24,956 INFO L262 CegarLoopResult]: For program point L7-6(lines 7 9) no Hoare annotation was computed. [2020-12-01 16:05:24,956 INFO L262 CegarLoopResult]: For program point L3-2(line 3) no Hoare annotation was computed. [2020-12-01 16:05:24,956 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-01 16:05:24,956 INFO L265 CegarLoopResult]: At program point L7-8(lines 6 11) the Hoare annotation is: true [2020-12-01 16:05:24,956 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-01 16:05:24,956 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-01 16:05:24,957 INFO L258 CegarLoopResult]: At program point L28(lines 12 29) the Hoare annotation is: (let ((.cse0 (* 2 ULTIMATE.start_gcd_test_~a))) (and (= ULTIMATE.start_main_~x~0 (+ |ULTIMATE.start_gcd_test_#res| (* ULTIMATE.start_main_~y~0 3))) (<= (+ ULTIMATE.start_gcd_test_~b .cse0) 18) (<= ULTIMATE.start_main_~x~0 (+ (* 3 ULTIMATE.start_gcd_test_~b) (* 7 ULTIMATE.start_gcd_test_~a))) (= ULTIMATE.start_main_~y~0 18) (= ULTIMATE.start_main_~x~0 63) (<= .cse0 18))) [2020-12-01 16:05:24,957 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-12-01 16:05:24,957 INFO L262 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-12-01 16:05:24,957 INFO L262 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-12-01 16:05:24,958 INFO L262 CegarLoopResult]: For program point L8-2(line 8) no Hoare annotation was computed. [2020-12-01 16:05:24,958 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-01 16:05:24,958 INFO L262 CegarLoopResult]: For program point L21-2(lines 21 27) no Hoare annotation was computed. [2020-12-01 16:05:24,958 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-12-01 16:05:24,958 INFO L262 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-12-01 16:05:24,959 INFO L258 CegarLoopResult]: At program point L22-2(lines 21 27) the Hoare annotation is: (let ((.cse6 (<= ULTIMATE.start_gcd_test_~b 18)) (.cse7 (<= 18 ULTIMATE.start_gcd_test_~b)) (.cse5 (= ULTIMATE.start_gcd_test_~b 18)) (.cse8 (+ ULTIMATE.start_gcd_test_~b ULTIMATE.start_gcd_test_~a)) (.cse2 (= ULTIMATE.start_main_~y~0 18)) (.cse1 (* 3 ULTIMATE.start_gcd_test_~b)) (.cse3 (= ULTIMATE.start_main_~x~0 63))) (or (let ((.cse0 (* 2 ULTIMATE.start_gcd_test_~a))) (and (<= (+ ULTIMATE.start_gcd_test_~b .cse0) 18) (<= ULTIMATE.start_main_~x~0 (+ .cse1 (* 7 ULTIMATE.start_gcd_test_~a))) .cse2 .cse3 (<= .cse0 18))) (let ((.cse4 (+ .cse1 ULTIMATE.start_gcd_test_~a))) (and (<= ULTIMATE.start_main_~x~0 .cse4) .cse2 (<= .cse4 63) .cse3 .cse5)) (and .cse6 .cse7 .cse2 .cse3 (= ULTIMATE.start_gcd_test_~a ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 .cse8) .cse6 .cse7 .cse2 .cse3) (let ((.cse9 (+ (* 2 ULTIMATE.start_gcd_test_~b) ULTIMATE.start_gcd_test_~a))) (and .cse2 (<= 63 .cse9) (<= .cse9 63) .cse3 .cse5)) (and (<= .cse8 18) (<= 18 (div (+ ULTIMATE.start_gcd_test_~b 63) 4)) .cse2 (<= ULTIMATE.start_main_~x~0 (+ .cse1 (* 4 ULTIMATE.start_gcd_test_~a))) .cse3))) [2020-12-01 16:05:24,959 INFO L265 CegarLoopResult]: At program point L47(lines 32 48) the Hoare annotation is: true [2020-12-01 16:05:24,959 INFO L262 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-12-01 16:05:24,959 INFO L262 CegarLoopResult]: For program point L14-2(lines 13 29) no Hoare annotation was computed. [2020-12-01 16:05:24,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 04:05:24 BoogieIcfgContainer [2020-12-01 16:05:24,996 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 16:05:24,997 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 16:05:25,009 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 16:05:25,010 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 16:05:25,010 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:05:18" (3/4) ... [2020-12-01 16:05:25,014 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-01 16:05:25,026 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-01 16:05:25,028 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-01 16:05:25,029 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-01 16:05:25,029 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-01 16:05:25,065 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((x == \result + y * 3 && b + 2 * a <= 18) && x <= 3 * b + 7 * a) && y == 18) && x == 63) && 2 * a <= 18 [2020-12-01 16:05:25,066 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((x == 3 * y + a && 1 == cond) && y == 18) && x == \result + 3 * y) && g + 3 * y == 63) && x == 63 [2020-12-01 16:05:25,068 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((x == 3 * y + a && 1 == cond) && y == 18) && x == \result + 3 * y) && g + 3 * y == 63) && x == 63 [2020-12-01 16:05:25,105 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_afdf3ba2-2fbb-419e-bdb6-b0bb6bdb6143/bin/uautomizer/witness.graphml [2020-12-01 16:05:25,109 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 16:05:25,111 INFO L168 Benchmark]: Toolchain (without parser) took 6939.88 ms. Allocated memory was 88.1 MB in the beginning and 138.4 MB in the end (delta: 50.3 MB). Free memory was 56.4 MB in the beginning and 97.6 MB in the end (delta: -41.2 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2020-12-01 16:05:25,112 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 88.1 MB. Free memory was 45.6 MB in the beginning and 45.5 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 16:05:25,115 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.46 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 56.2 MB in the beginning and 92.5 MB in the end (delta: -36.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 16:05:25,116 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.59 ms. Allocated memory is still 115.3 MB. Free memory was 92.5 MB in the beginning and 91.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 16:05:25,116 INFO L168 Benchmark]: Boogie Preprocessor took 34.39 ms. Allocated memory is still 115.3 MB. Free memory was 91.1 MB in the beginning and 89.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 16:05:25,117 INFO L168 Benchmark]: RCFGBuilder took 319.70 ms. Allocated memory is still 115.3 MB. Free memory was 89.8 MB in the beginning and 76.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-01 16:05:25,117 INFO L168 Benchmark]: TraceAbstraction took 6061.34 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 75.8 MB in the beginning and 100.7 MB in the end (delta: -24.9 MB). Peak memory consumption was 61.8 MB. Max. memory is 16.1 GB. [2020-12-01 16:05:25,119 INFO L168 Benchmark]: Witness Printer took 112.88 ms. Allocated memory is still 138.4 MB. Free memory was 100.7 MB in the beginning and 97.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 16:05:25,121 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 88.1 MB. Free memory was 45.6 MB in the beginning and 45.5 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 338.46 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 56.2 MB in the beginning and 92.5 MB in the end (delta: -36.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.59 ms. Allocated memory is still 115.3 MB. Free memory was 92.5 MB in the beginning and 91.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.39 ms. Allocated memory is still 115.3 MB. Free memory was 91.1 MB in the beginning and 89.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 319.70 ms. Allocated memory is still 115.3 MB. Free memory was 89.8 MB in the beginning and 76.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6061.34 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 75.8 MB in the beginning and 100.7 MB in the end (delta: -24.9 MB). Peak memory consumption was 61.8 MB. Max. memory is 16.1 GB. * Witness Printer took 112.88 ms. Allocated memory is still 138.4 MB. Free memory was 100.7 MB in the beginning and 97.6 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: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: ((((x == 3 * y + a && 1 == cond) && y == 18) && x == \result + 3 * y) && g + 3 * y == 63) && x == 63 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: ((((x == \result + y * 3 && b + 2 * a <= 18) && x <= 3 * b + 7 * a) && y == 18) && x == 63) && 2 * a <= 18 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: ((((x == 3 * y + a && 1 == cond) && y == 18) && x == \result + 3 * y) && g + 3 * y == 63) && x == 63 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((((((((b + 2 * a <= 18 && x <= 3 * b + 7 * a) && y == 18) && x == 63) && 2 * a <= 18) || ((((x <= 3 * b + a && y == 18) && 3 * b + a <= 63) && x == 63) && b == 18)) || ((((b <= 18 && 18 <= b) && y == 18) && x == 63) && a == x)) || ((((x == b + a && b <= 18) && 18 <= b) && y == 18) && x == 63)) || ((((y == 18 && 63 <= 2 * b + a) && 2 * b + a <= 63) && x == 63) && b == 18)) || ((((b + a <= 18 && 18 <= (b + 63) / 4) && y == 18) && x <= 3 * b + 4 * a) && x == 63) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.4s, OverallIterations: 9, TraceHistogramMax: 6, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 96 SDslu, 325 SDs, 0 SdLazy, 436 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 23 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 19 NumberOfFragments, 238 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 183 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 142 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 133 ConstructedInterpolants, 1 QuantifiedInterpolants, 18870 SizeOfPredicates, 51 NumberOfNonLiveVariables, 600 ConjunctsInSsa, 114 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 28/116 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...