./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6cd948af0e0b6c8603db03ff6e3dfbac759cb557 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 10:12:13,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 10:12:13,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 10:12:13,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 10:12:13,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 10:12:13,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 10:12:13,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 10:12:13,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 10:12:13,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 10:12:13,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 10:12:13,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 10:12:13,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 10:12:13,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 10:12:13,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 10:12:13,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 10:12:13,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 10:12:13,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 10:12:13,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 10:12:13,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 10:12:13,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 10:12:13,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 10:12:13,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 10:12:13,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 10:12:13,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 10:12:13,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 10:12:13,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 10:12:13,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 10:12:13,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 10:12:13,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 10:12:13,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 10:12:13,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 10:12:13,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 10:12:13,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 10:12:13,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 10:12:13,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 10:12:13,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 10:12:13,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 10:12:13,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 10:12:13,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 10:12:13,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 10:12:13,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 10:12:13,850 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 10:12:13,881 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 10:12:13,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 10:12:13,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 10:12:13,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 10:12:13,883 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 10:12:13,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 10:12:13,884 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 10:12:13,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 10:12:13,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 10:12:13,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 10:12:13,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 10:12:13,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 10:12:13,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 10:12:13,885 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 10:12:13,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 10:12:13,886 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 10:12:13,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 10:12:13,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 10:12:13,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 10:12:13,886 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 10:12:13,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 10:12:13,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 10:12:13,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 10:12:13,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 10:12:13,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 10:12:13,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 10:12:13,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 10:12:13,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 10:12:13,889 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_463fa13d-689d-41d1-9177-c90086c4e8fa/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(__VERIFIER_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 -> 6cd948af0e0b6c8603db03ff6e3dfbac759cb557 [2019-11-20 10:12:14,068 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 10:12:14,082 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 10:12:14,087 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 10:12:14,089 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 10:12:14,089 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 10:12:14,092 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/bin/uautomizer/../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2019-11-20 10:12:14,162 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/bin/uautomizer/data/db03c8cb3/28ac4fec491b45378285c15e75fe9b24/FLAGa13ff8bac [2019-11-20 10:12:14,565 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 10:12:14,566 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2019-11-20 10:12:14,574 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/bin/uautomizer/data/db03c8cb3/28ac4fec491b45378285c15e75fe9b24/FLAGa13ff8bac [2019-11-20 10:12:14,946 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/bin/uautomizer/data/db03c8cb3/28ac4fec491b45378285c15e75fe9b24 [2019-11-20 10:12:14,949 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 10:12:14,950 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 10:12:14,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 10:12:14,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 10:12:14,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 10:12:14,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:12:14" (1/1) ... [2019-11-20 10:12:14,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@db38654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:12:14, skipping insertion in model container [2019-11-20 10:12:14,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:12:14" (1/1) ... [2019-11-20 10:12:14,966 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 10:12:14,983 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 10:12:15,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:12:15,206 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 10:12:15,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:12:15,330 INFO L192 MainTranslator]: Completed translation [2019-11-20 10:12:15,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:12:15 WrapperNode [2019-11-20 10:12:15,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 10:12:15,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 10:12:15,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 10:12:15,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 10:12:15,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:12:15" (1/1) ... [2019-11-20 10:12:15,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:12:15" (1/1) ... [2019-11-20 10:12:15,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 10:12:15,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 10:12:15,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 10:12:15,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 10:12:15,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:12:15" (1/1) ... [2019-11-20 10:12:15,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:12:15" (1/1) ... [2019-11-20 10:12:15,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:12:15" (1/1) ... [2019-11-20 10:12:15,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:12:15" (1/1) ... [2019-11-20 10:12:15,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:12:15" (1/1) ... [2019-11-20 10:12:15,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:12:15" (1/1) ... [2019-11-20 10:12:15,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:12:15" (1/1) ... [2019-11-20 10:12:15,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 10:12:15,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 10:12:15,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 10:12:15,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 10:12:15,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:12:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/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 [2019-11-20 10:12:15,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 10:12:15,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 10:12:15,625 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 10:12:15,625 INFO L285 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-20 10:12:15,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:12:15 BoogieIcfgContainer [2019-11-20 10:12:15,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 10:12:15,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 10:12:15,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 10:12:15,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 10:12:15,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:12:14" (1/3) ... [2019-11-20 10:12:15,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669b1c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:12:15, skipping insertion in model container [2019-11-20 10:12:15,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:12:15" (2/3) ... [2019-11-20 10:12:15,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669b1c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:12:15, skipping insertion in model container [2019-11-20 10:12:15,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:12:15" (3/3) ... [2019-11-20 10:12:15,634 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2019-11-20 10:12:15,644 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 10:12:15,651 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 10:12:15,662 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 10:12:15,686 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 10:12:15,687 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 10:12:15,687 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 10:12:15,687 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 10:12:15,687 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 10:12:15,688 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 10:12:15,688 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 10:12:15,688 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 10:12:15,704 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-20 10:12:15,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-20 10:12:15,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:12:15,714 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-20 10:12:15,715 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 10:12:15,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:12:15,724 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-11-20 10:12:15,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:12:15,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306513507] [2019-11-20 10:12:15,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:12:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:12:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:12:15,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306513507] [2019-11-20 10:12:15,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:12:15,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 10:12:15,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331073958] [2019-11-20 10:12:15,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 10:12:15,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:12:15,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 10:12:15,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:12:15,976 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-20 10:12:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:12:16,035 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-11-20 10:12:16,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 10:12:16,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-20 10:12:16,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:12:16,051 INFO L225 Difference]: With dead ends: 17 [2019-11-20 10:12:16,051 INFO L226 Difference]: Without dead ends: 7 [2019-11-20 10:12:16,055 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:12:16,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-20 10:12:16,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-20 10:12:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-20 10:12:16,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-20 10:12:16,081 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-11-20 10:12:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:12:16,081 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-20 10:12:16,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 10:12:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-20 10:12:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-20 10:12:16,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:12:16,082 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-20 10:12:16,083 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 10:12:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:12:16,083 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2019-11-20 10:12:16,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:12:16,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234606422] [2019-11-20 10:12:16,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:12:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:12:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:12:16,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234606422] [2019-11-20 10:12:16,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788423683] [2019-11-20 10:12:16,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/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 [2019-11-20 10:12:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:12:16,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 10:12:16,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:12:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:12:16,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:12:16,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-11-20 10:12:16,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881823271] [2019-11-20 10:12:16,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 10:12:16,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:12:16,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 10:12:16,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 10:12:16,273 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2019-11-20 10:12:16,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:12:16,297 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-11-20 10:12:16,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 10:12:16,298 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-20 10:12:16,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:12:16,299 INFO L225 Difference]: With dead ends: 12 [2019-11-20 10:12:16,299 INFO L226 Difference]: Without dead ends: 8 [2019-11-20 10:12:16,300 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 10:12:16,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-20 10:12:16,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-20 10:12:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-20 10:12:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-20 10:12:16,303 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-11-20 10:12:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:12:16,303 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-20 10:12:16,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 10:12:16,304 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-20 10:12:16,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-20 10:12:16,304 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:12:16,304 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-11-20 10:12:16,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:12:16,505 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 10:12:16,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:12:16,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 2 times [2019-11-20 10:12:16,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:12:16,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253047165] [2019-11-20 10:12:16,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:12:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:12:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:12:16,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253047165] [2019-11-20 10:12:16,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185173036] [2019-11-20 10:12:16,624 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/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 [2019-11-20 10:12:16,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 10:12:16,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:12:16,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 10:12:16,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:12:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:12:16,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:12:16,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-20 10:12:16,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600329576] [2019-11-20 10:12:16,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 10:12:16,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:12:16,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 10:12:16,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-20 10:12:16,689 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2019-11-20 10:12:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:12:16,720 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-11-20 10:12:16,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 10:12:16,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-11-20 10:12:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:12:16,721 INFO L225 Difference]: With dead ends: 13 [2019-11-20 10:12:16,722 INFO L226 Difference]: Without dead ends: 9 [2019-11-20 10:12:16,722 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-20 10:12:16,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-20 10:12:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-20 10:12:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-20 10:12:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-20 10:12:16,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2019-11-20 10:12:16,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:12:16,727 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-20 10:12:16,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 10:12:16,727 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-20 10:12:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-20 10:12:16,728 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:12:16,728 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2019-11-20 10:12:16,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:12:16,936 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 10:12:16,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:12:16,937 INFO L82 PathProgramCache]: Analyzing trace with hash 516237138, now seen corresponding path program 3 times [2019-11-20 10:12:16,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:12:16,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862305300] [2019-11-20 10:12:16,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:12:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:12:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:12:17,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862305300] [2019-11-20 10:12:17,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740555220] [2019-11-20 10:12:17,026 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/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 [2019-11-20 10:12:17,059 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 10:12:17,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:12:17,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 10:12:17,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:12:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:12:17,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:12:17,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-20 10:12:17,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870767255] [2019-11-20 10:12:17,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 10:12:17,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:12:17,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 10:12:17,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-20 10:12:17,096 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2019-11-20 10:12:17,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:12:17,136 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-11-20 10:12:17,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 10:12:17,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2019-11-20 10:12:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:12:17,139 INFO L225 Difference]: With dead ends: 14 [2019-11-20 10:12:17,139 INFO L226 Difference]: Without dead ends: 10 [2019-11-20 10:12:17,140 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-20 10:12:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-20 10:12:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-20 10:12:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-20 10:12:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-11-20 10:12:17,143 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2019-11-20 10:12:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:12:17,144 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-11-20 10:12:17,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 10:12:17,144 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-11-20 10:12:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 10:12:17,144 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:12:17,144 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2019-11-20 10:12:17,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:12:17,345 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 10:12:17,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:12:17,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1174852536, now seen corresponding path program 4 times [2019-11-20 10:12:17,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:12:17,346 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430772659] [2019-11-20 10:12:17,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:12:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:12:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:12:17,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430772659] [2019-11-20 10:12:17,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960370573] [2019-11-20 10:12:17,488 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/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 [2019-11-20 10:12:17,517 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 10:12:17,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:12:17,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 10:12:17,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:12:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:12:17,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:12:17,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-20 10:12:17,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935105155] [2019-11-20 10:12:17,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 10:12:17,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:12:17,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 10:12:17,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-20 10:12:17,546 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2019-11-20 10:12:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:12:17,597 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-20 10:12:17,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 10:12:17,597 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-11-20 10:12:17,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:12:17,598 INFO L225 Difference]: With dead ends: 15 [2019-11-20 10:12:17,598 INFO L226 Difference]: Without dead ends: 11 [2019-11-20 10:12:17,599 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-20 10:12:17,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-20 10:12:17,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-20 10:12:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-20 10:12:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-20 10:12:17,602 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2019-11-20 10:12:17,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:12:17,603 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-20 10:12:17,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 10:12:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-20 10:12:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 10:12:17,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:12:17,604 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1] [2019-11-20 10:12:17,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:12:17,804 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 10:12:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:12:17,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2059024878, now seen corresponding path program 5 times [2019-11-20 10:12:17,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:12:17,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768903846] [2019-11-20 10:12:17,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:12:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:12:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:12:17,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768903846] [2019-11-20 10:12:17,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172049636] [2019-11-20 10:12:17,958 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/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 [2019-11-20 10:12:17,993 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-20 10:12:17,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:12:17,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 10:12:17,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:12:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:12:18,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:12:18,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-20 10:12:18,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921769633] [2019-11-20 10:12:18,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 10:12:18,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:12:18,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 10:12:18,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-20 10:12:18,029 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2019-11-20 10:12:18,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:12:18,089 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-11-20 10:12:18,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 10:12:18,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2019-11-20 10:12:18,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:12:18,091 INFO L225 Difference]: With dead ends: 16 [2019-11-20 10:12:18,091 INFO L226 Difference]: Without dead ends: 12 [2019-11-20 10:12:18,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-20 10:12:18,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-20 10:12:18,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-20 10:12:18,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-20 10:12:18,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-20 10:12:18,094 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-11-20 10:12:18,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:12:18,095 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-20 10:12:18,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 10:12:18,095 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-20 10:12:18,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 10:12:18,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:12:18,095 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2019-11-20 10:12:18,300 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:12:18,300 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 10:12:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:12:18,300 INFO L82 PathProgramCache]: Analyzing trace with hash 596403592, now seen corresponding path program 6 times [2019-11-20 10:12:18,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:12:18,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235174067] [2019-11-20 10:12:18,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:12:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:12:20,440 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 12 [2019-11-20 10:12:22,452 WARN L838 $PredicateComparison]: unable to prove that (<= (* 536870912 (div (+ (* c_ULTIMATE.start_main_~y~0 178956971) 715827879) 536870912)) (+ (* 178956971 c_ULTIMATE.start_main_~y~0) 178956968)) is different from false [2019-11-20 10:12:25,819 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 12 [2019-11-20 10:12:27,831 WARN L838 $PredicateComparison]: unable to prove that (<= (* 2147483648 (div (+ (* c_ULTIMATE.start_main_~y~0 715827883) 2863311519) 2147483648)) (+ (* 715827883 c_ULTIMATE.start_main_~y~0) 715827872)) is different from false [2019-11-20 10:12:29,880 WARN L191 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 18 [2019-11-20 10:12:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2019-11-20 10:12:29,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235174067] [2019-11-20 10:12:29,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137949388] [2019-11-20 10:12:29,903 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/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 [2019-11-20 10:12:29,961 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-20 10:12:29,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:12:29,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 10:12:29,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:12:39,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:12:39,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:12:39,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:12:39,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:12:39,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:12:39,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:12:39,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:12:39,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:12:39,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:12:39,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:12:39,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:13:20,806 WARN L191 SmtUtils]: Spent 20.46 s on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2019-11-20 10:13:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:13:21,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:13:21,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-20 10:13:21,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955191116] [2019-11-20 10:13:21,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 10:13:21,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:13:21,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 10:13:21,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=164, Unknown=12, NotChecked=54, Total=272 [2019-11-20 10:13:21,143 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 17 states. [2019-11-20 10:13:44,647 WARN L191 SmtUtils]: Spent 22.51 s on a formula simplification that was a NOOP. DAG size: 59 [2019-11-20 10:13:49,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:13:49,637 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-11-20 10:13:49,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 10:13:49,638 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 11 [2019-11-20 10:13:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:13:49,638 INFO L225 Difference]: With dead ends: 20 [2019-11-20 10:13:49,639 INFO L226 Difference]: Without dead ends: 14 [2019-11-20 10:13:49,639 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 88.1s TimeCoverageRelationStatistics Valid=53, Invalid=214, Unknown=13, NotChecked=62, Total=342 [2019-11-20 10:13:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-20 10:13:49,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-20 10:13:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 10:13:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-11-20 10:13:49,645 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-11-20 10:13:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:13:49,645 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-11-20 10:13:49,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 10:13:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-11-20 10:13:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 10:13:49,646 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:13:49,646 INFO L410 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1] [2019-11-20 10:13:49,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:13:49,848 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 10:13:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:13:49,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1966493384, now seen corresponding path program 7 times [2019-11-20 10:13:49,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:13:49,848 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409733335] [2019-11-20 10:13:49,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:13:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:13:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 10:13:49,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409733335] [2019-11-20 10:13:49,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305521753] [2019-11-20 10:13:49,974 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/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 [2019-11-20 10:13:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:13:50,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 10:13:50,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:13:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 10:13:50,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:13:50,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-20 10:13:50,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838038755] [2019-11-20 10:13:50,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 10:13:50,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:13:50,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 10:13:50,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-20 10:13:50,044 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2019-11-20 10:13:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:13:50,090 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-11-20 10:13:50,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 10:13:50,091 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-11-20 10:13:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:13:50,092 INFO L225 Difference]: With dead ends: 14 [2019-11-20 10:13:50,092 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 10:13:50,092 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-20 10:13:50,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 10:13:50,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 10:13:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 10:13:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 10:13:50,093 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2019-11-20 10:13:50,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:13:50,093 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 10:13:50,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 10:13:50,093 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 10:13:50,094 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 10:13:50,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:13:50,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 10:13:50,517 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2019-11-20 10:13:50,520 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 10:13:50,520 INFO L444 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-20 10:13:50,520 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 10:13:50,520 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 10:13:50,520 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-20 10:13:50,520 INFO L440 ceAbstractionStarter]: At program point L14-2(lines 14 17) the Hoare annotation is: (let ((.cse10 (div (- ULTIMATE.start_main_~y~0) (- 2)))) (let ((.cse4 (div (- .cse10) (- 2)))) (let ((.cse3 (div (- .cse4) (- 2)))) (let ((.cse9 (div (- .cse3) (- 2)))) (let ((.cse1 (= (mod .cse4 (- 2)) 0)) (.cse2 (= 0 (mod .cse10 (- 2)))) (.cse7 (= (mod .cse3 (- 2)) 0)) (.cse6 (div (- .cse9) (- 2))) (.cse8 (= 0 (mod .cse9 (- 2)))) (.cse0 (= 0 (mod ULTIMATE.start_main_~y~0 (- 2))))) (or (and (<= ULTIMATE.start_main_~x~0 3) .cse0 .cse1 .cse2 (<= 1 .cse3) (<= 3 ULTIMATE.start_main_~x~0) (<= .cse3 1)) (and (<= ULTIMATE.start_main_~y~0 1) (<= ULTIMATE.start_main_~x~0 0) (<= 1 ULTIMATE.start_main_~y~0) (<= 0 ULTIMATE.start_main_~x~0)) (and .cse0 (<= 1 .cse4) .cse2 (<= .cse4 1) (<= ULTIMATE.start_main_~x~0 2) (<= 2 ULTIMATE.start_main_~x~0)) (let ((.cse5 (div (- .cse6) (- 2)))) (and (<= 6 ULTIMATE.start_main_~x~0) .cse0 .cse1 .cse2 (<= .cse5 1) (<= 1 .cse5) (= 0 (mod .cse6 (- 2))) .cse7 .cse8 (<= ULTIMATE.start_main_~x~0 6))) (and .cse0 (<= ULTIMATE.start_main_~x~0 4) .cse1 .cse2 (<= 4 ULTIMATE.start_main_~x~0) (<= .cse9 1) (<= 1 .cse9) .cse7) (and .cse0 (<= .cse6 1) .cse1 .cse2 (<= 5 ULTIMATE.start_main_~x~0) .cse7 (<= 1 .cse6) (<= ULTIMATE.start_main_~x~0 5) .cse8) (and .cse0 (<= 1 ULTIMATE.start_main_~x~0) (<= .cse10 1) (<= 1 .cse10) (<= ULTIMATE.start_main_~x~0 1)))))))) [2019-11-20 10:13:50,520 INFO L444 ceAbstractionStarter]: For program point L14-3(lines 14 17) no Hoare annotation was computed. [2019-11-20 10:13:50,521 INFO L444 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-20 10:13:50,521 INFO L447 ceAbstractionStarter]: At program point L4-2(lines 1 20) the Hoare annotation is: true [2019-11-20 10:13:50,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 10:13:50 BoogieIcfgContainer [2019-11-20 10:13:50,542 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 10:13:50,542 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 10:13:50,542 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 10:13:50,542 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 10:13:50,543 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:12:15" (3/4) ... [2019-11-20 10:13:50,546 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 10:13:50,554 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-20 10:13:50,554 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 10:13:50,589 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_463fa13d-689d-41d1-9177-c90086c4e8fa/bin/uautomizer/witness.graphml [2019-11-20 10:13:50,589 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 10:13:50,590 INFO L168 Benchmark]: Toolchain (without parser) took 95639.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.9 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -111.2 MB). Peak memory consumption was 69.7 MB. Max. memory is 11.5 GB. [2019-11-20 10:13:50,591 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:13:50,591 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.9 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -225.5 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-11-20 10:13:50,592 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.76 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:13:50,592 INFO L168 Benchmark]: Boogie Preprocessor took 17.81 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:13:50,592 INFO L168 Benchmark]: RCFGBuilder took 246.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-20 10:13:50,593 INFO L168 Benchmark]: TraceAbstraction took 94914.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 89.3 MB). Peak memory consumption was 89.3 MB. Max. memory is 11.5 GB. [2019-11-20 10:13:50,593 INFO L168 Benchmark]: Witness Printer took 47.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-20 10:13:50,596 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 379.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.9 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -225.5 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.76 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.81 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 246.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 94914.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 89.3 MB). Peak memory consumption was 89.3 MB. Max. memory is 11.5 GB. * Witness Printer took 47.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((((((((((x <= 3 && 0 == y % -2) && -(-y / -2) / -2 % -2 == 0) && 0 == -y / -2 % -2) && 1 <= -(-(-y / -2) / -2) / -2) && 3 <= x) && -(-(-y / -2) / -2) / -2 <= 1) || (((y <= 1 && x <= 0) && 1 <= y) && 0 <= x)) || (((((0 == y % -2 && 1 <= -(-y / -2) / -2) && 0 == -y / -2 % -2) && -(-y / -2) / -2 <= 1) && x <= 2) && 2 <= x)) || (((((((((6 <= x && 0 == y % -2) && -(-y / -2) / -2 % -2 == 0) && 0 == -y / -2 % -2) && -(-(-(-(-(-y / -2) / -2) / -2) / -2) / -2) / -2 <= 1) && 1 <= -(-(-(-(-(-y / -2) / -2) / -2) / -2) / -2) / -2) && 0 == -(-(-(-(-y / -2) / -2) / -2) / -2) / -2 % -2) && -(-(-y / -2) / -2) / -2 % -2 == 0) && 0 == -(-(-(-y / -2) / -2) / -2) / -2 % -2) && x <= 6)) || (((((((0 == y % -2 && x <= 4) && -(-y / -2) / -2 % -2 == 0) && 0 == -y / -2 % -2) && 4 <= x) && -(-(-(-y / -2) / -2) / -2) / -2 <= 1) && 1 <= -(-(-(-y / -2) / -2) / -2) / -2) && -(-(-y / -2) / -2) / -2 % -2 == 0)) || ((((((((0 == y % -2 && -(-(-(-(-y / -2) / -2) / -2) / -2) / -2 <= 1) && -(-y / -2) / -2 % -2 == 0) && 0 == -y / -2 % -2) && 5 <= x) && -(-(-y / -2) / -2) / -2 % -2 == 0) && 1 <= -(-(-(-(-y / -2) / -2) / -2) / -2) / -2) && x <= 5) && 0 == -(-(-(-y / -2) / -2) / -2) / -2 % -2)) || ((((0 == y % -2 && 1 <= x) && -y / -2 <= 1) && 1 <= -y / -2) && x <= 1) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Result: SAFE, OverallTime: 94.8s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 28.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 38 SDtfs, 2 SDslu, 100 SDs, 0 SdLazy, 258 SolverSat, 22 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 88.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 10 NumberOfFragments, 429 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 63.6s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 118 ConstructedInterpolants, 1 QuantifiedInterpolants, 16750 SizeOfPredicates, 8 NumberOfNonLiveVariables, 243 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 30/184 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...