./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-1.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_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/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 c7b71b458b3f08f188a62c7539b715f43fd7f97d ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 04:40:01,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 04:40:01,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 04:40:01,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 04:40:01,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 04:40:01,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 04:40:01,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 04:40:01,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 04:40:01,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 04:40:01,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 04:40:01,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 04:40:01,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 04:40:01,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 04:40:01,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 04:40:01,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 04:40:01,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 04:40:01,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 04:40:01,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 04:40:01,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 04:40:01,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 04:40:01,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 04:40:01,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 04:40:01,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 04:40:01,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 04:40:01,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 04:40:01,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 04:40:01,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 04:40:01,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 04:40:01,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 04:40:01,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 04:40:01,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 04:40:01,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 04:40:01,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 04:40:01,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 04:40:01,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 04:40:01,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 04:40:01,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 04:40:01,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 04:40:01,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 04:40:01,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 04:40:01,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 04:40:01,599 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 04:40:01,618 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 04:40:01,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 04:40:01,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 04:40:01,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 04:40:01,620 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 04:40:01,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 04:40:01,621 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 04:40:01,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 04:40:01,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 04:40:01,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 04:40:01,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 04:40:01,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 04:40:01,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 04:40:01,622 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 04:40:01,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 04:40:01,623 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 04:40:01,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 04:40:01,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 04:40:01,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 04:40:01,624 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 04:40:01,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 04:40:01,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 04:40:01,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 04:40:01,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 04:40:01,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 04:40:01,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 04:40:01,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 04:40:01,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 04:40:01,626 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_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/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 -> c7b71b458b3f08f188a62c7539b715f43fd7f97d [2019-11-20 04:40:01,806 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 04:40:01,824 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 04:40:01,830 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 04:40:01,832 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 04:40:01,832 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 04:40:01,834 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-11-20 04:40:01,907 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/bin/uautomizer/data/6792c364a/cf10817604a546368a48d56c4747502b/FLAG694d3cfda [2019-11-20 04:40:02,361 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 04:40:02,362 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-11-20 04:40:02,370 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/bin/uautomizer/data/6792c364a/cf10817604a546368a48d56c4747502b/FLAG694d3cfda [2019-11-20 04:40:02,683 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/bin/uautomizer/data/6792c364a/cf10817604a546368a48d56c4747502b [2019-11-20 04:40:02,686 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 04:40:02,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 04:40:02,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 04:40:02,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 04:40:02,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 04:40:02,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:40:02" (1/1) ... [2019-11-20 04:40:02,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5370413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:40:02, skipping insertion in model container [2019-11-20 04:40:02,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:40:02" (1/1) ... [2019-11-20 04:40:02,706 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 04:40:02,723 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 04:40:02,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:40:02,940 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 04:40:03,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:40:03,059 INFO L192 MainTranslator]: Completed translation [2019-11-20 04:40:03,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:40:03 WrapperNode [2019-11-20 04:40:03,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 04:40:03,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 04:40:03,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 04:40:03,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 04:40:03,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:40:03" (1/1) ... [2019-11-20 04:40:03,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:40:03" (1/1) ... [2019-11-20 04:40:03,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 04:40:03,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 04:40:03,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 04:40:03,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 04:40:03,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:40:03" (1/1) ... [2019-11-20 04:40:03,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:40:03" (1/1) ... [2019-11-20 04:40:03,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:40:03" (1/1) ... [2019-11-20 04:40:03,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:40:03" (1/1) ... [2019-11-20 04:40:03,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:40:03" (1/1) ... [2019-11-20 04:40:03,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:40:03" (1/1) ... [2019-11-20 04:40:03,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:40:03" (1/1) ... [2019-11-20 04:40:03,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 04:40:03,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 04:40:03,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 04:40:03,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 04:40:03,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:40:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/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 04:40:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 04:40:03,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 04:40:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-20 04:40:03,166 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-20 04:40:03,343 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 04:40:03,343 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 04:40:03,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:40:03 BoogieIcfgContainer [2019-11-20 04:40:03,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 04:40:03,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 04:40:03,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 04:40:03,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 04:40:03,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 04:40:02" (1/3) ... [2019-11-20 04:40:03,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d25da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:40:03, skipping insertion in model container [2019-11-20 04:40:03,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:40:03" (2/3) ... [2019-11-20 04:40:03,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d25da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:40:03, skipping insertion in model container [2019-11-20 04:40:03,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:40:03" (3/3) ... [2019-11-20 04:40:03,351 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2019-11-20 04:40:03,373 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 04:40:03,381 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 04:40:03,405 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 04:40:03,437 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 04:40:03,438 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 04:40:03,438 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 04:40:03,438 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 04:40:03,438 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 04:40:03,449 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 04:40:03,449 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 04:40:03,450 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 04:40:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-20 04:40:03,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 04:40:03,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:40:03,482 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:40:03,483 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:40:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:40:03,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1007516703, now seen corresponding path program 1 times [2019-11-20 04:40:03,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:40:03,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789646391] [2019-11-20 04:40:03,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:40:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:03,705 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 04:40:03,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789646391] [2019-11-20 04:40:03,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:40:03,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 04:40:03,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936551655] [2019-11-20 04:40:03,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 04:40:03,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:40:03,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 04:40:03,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:40:03,725 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2019-11-20 04:40:03,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:40:03,840 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-11-20 04:40:03,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 04:40:03,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-20 04:40:03,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:40:03,851 INFO L225 Difference]: With dead ends: 29 [2019-11-20 04:40:03,852 INFO L226 Difference]: Without dead ends: 17 [2019-11-20 04:40:03,855 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:40:03,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-20 04:40:03,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-20 04:40:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 04:40:03,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-20 04:40:03,895 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-11-20 04:40:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:40:03,895 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-20 04:40:03,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 04:40:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-20 04:40:03,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 04:40:03,897 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:40:03,898 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:40:03,898 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:40:03,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:40:03,898 INFO L82 PathProgramCache]: Analyzing trace with hash -453503986, now seen corresponding path program 1 times [2019-11-20 04:40:03,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:40:03,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989627379] [2019-11-20 04:40:03,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:40:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:03,960 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 04:40:03,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989627379] [2019-11-20 04:40:03,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:40:03,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 04:40:03,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994214980] [2019-11-20 04:40:03,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 04:40:03,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:40:03,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 04:40:03,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:40:03,964 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 5 states. [2019-11-20 04:40:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:40:04,035 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-11-20 04:40:04,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 04:40:04,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-20 04:40:04,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:40:04,037 INFO L225 Difference]: With dead ends: 23 [2019-11-20 04:40:04,037 INFO L226 Difference]: Without dead ends: 19 [2019-11-20 04:40:04,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:40:04,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-20 04:40:04,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-20 04:40:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 04:40:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-20 04:40:04,052 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-11-20 04:40:04,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:40:04,053 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-20 04:40:04,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 04:40:04,053 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-20 04:40:04,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 04:40:04,056 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:40:04,056 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:40:04,056 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:40:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:40:04,057 INFO L82 PathProgramCache]: Analyzing trace with hash 511906889, now seen corresponding path program 1 times [2019-11-20 04:40:04,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:40:04,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557036996] [2019-11-20 04:40:04,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:40:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-20 04:40:04,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557036996] [2019-11-20 04:40:04,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273715284] [2019-11-20 04:40:04,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/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 04:40:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:04,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 04:40:04,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:40:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-20 04:40:04,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:40:04,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-20 04:40:04,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733556616] [2019-11-20 04:40:04,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 04:40:04,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:40:04,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 04:40:04,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-20 04:40:04,380 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 8 states. [2019-11-20 04:40:04,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:40:04,495 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2019-11-20 04:40:04,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 04:40:04,499 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-11-20 04:40:04,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:40:04,501 INFO L225 Difference]: With dead ends: 41 [2019-11-20 04:40:04,501 INFO L226 Difference]: Without dead ends: 26 [2019-11-20 04:40:04,502 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-20 04:40:04,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-20 04:40:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-20 04:40:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-20 04:40:04,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-11-20 04:40:04,516 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 22 [2019-11-20 04:40:04,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:40:04,518 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-11-20 04:40:04,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 04:40:04,518 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-11-20 04:40:04,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 04:40:04,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:40:04,523 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:40:04,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:40:04,727 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:40:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:40:04,727 INFO L82 PathProgramCache]: Analyzing trace with hash 178931364, now seen corresponding path program 1 times [2019-11-20 04:40:04,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:40:04,728 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315958914] [2019-11-20 04:40:04,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:40:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 04:40:04,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315958914] [2019-11-20 04:40:04,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190098571] [2019-11-20 04:40:04,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/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 04:40:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:04,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 04:40:04,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:40:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 04:40:04,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:40:04,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-20 04:40:04,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116805221] [2019-11-20 04:40:04,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 04:40:04,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:40:04,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 04:40:04,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-20 04:40:04,945 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 8 states. [2019-11-20 04:40:05,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:40:05,072 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2019-11-20 04:40:05,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 04:40:05,073 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-20 04:40:05,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:40:05,075 INFO L225 Difference]: With dead ends: 47 [2019-11-20 04:40:05,076 INFO L226 Difference]: Without dead ends: 43 [2019-11-20 04:40:05,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-20 04:40:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-20 04:40:05,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-11-20 04:40:05,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-20 04:40:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 58 transitions. [2019-11-20 04:40:05,090 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 58 transitions. Word has length 23 [2019-11-20 04:40:05,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:40:05,090 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 58 transitions. [2019-11-20 04:40:05,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 04:40:05,091 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 58 transitions. [2019-11-20 04:40:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 04:40:05,093 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:40:05,094 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 04:40:05,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:40:05,299 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:40:05,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:40:05,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1840059703, now seen corresponding path program 2 times [2019-11-20 04:40:05,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:40:05,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756235704] [2019-11-20 04:40:05,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:40:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-20 04:40:05,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756235704] [2019-11-20 04:40:05,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784350546] [2019-11-20 04:40:05,485 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/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 04:40:05,531 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:40:05,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:40:05,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 04:40:05,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:40:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-20 04:40:05,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:40:05,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-20 04:40:05,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318430499] [2019-11-20 04:40:05,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 04:40:05,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:40:05,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 04:40:05,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-20 04:40:05,585 INFO L87 Difference]: Start difference. First operand 40 states and 58 transitions. Second operand 10 states. [2019-11-20 04:40:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:40:05,766 INFO L93 Difference]: Finished difference Result 67 states and 101 transitions. [2019-11-20 04:40:05,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 04:40:05,767 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-11-20 04:40:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:40:05,769 INFO L225 Difference]: With dead ends: 67 [2019-11-20 04:40:05,769 INFO L226 Difference]: Without dead ends: 29 [2019-11-20 04:40:05,770 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-11-20 04:40:05,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-20 04:40:05,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-11-20 04:40:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 04:40:05,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-20 04:40:05,777 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 35 [2019-11-20 04:40:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:40:05,778 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-20 04:40:05,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 04:40:05,778 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-20 04:40:05,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-20 04:40:05,780 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:40:05,780 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:40:05,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:40:05,986 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:40:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:40:05,987 INFO L82 PathProgramCache]: Analyzing trace with hash 624826665, now seen corresponding path program 2 times [2019-11-20 04:40:05,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:40:05,987 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279182581] [2019-11-20 04:40:05,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:40:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-20 04:40:06,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279182581] [2019-11-20 04:40:06,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088499461] [2019-11-20 04:40:06,184 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/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 04:40:06,229 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:40:06,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:40:06,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 04:40:06,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:40:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-20 04:40:06,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:40:06,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-11-20 04:40:06,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525946289] [2019-11-20 04:40:06,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 04:40:06,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:40:06,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 04:40:06,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-20 04:40:06,267 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 10 states. [2019-11-20 04:40:06,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:40:06,414 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-20 04:40:06,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 04:40:06,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-11-20 04:40:06,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:40:06,417 INFO L225 Difference]: With dead ends: 52 [2019-11-20 04:40:06,417 INFO L226 Difference]: Without dead ends: 48 [2019-11-20 04:40:06,418 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-20 04:40:06,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-20 04:40:06,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2019-11-20 04:40:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-20 04:40:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2019-11-20 04:40:06,428 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 37 [2019-11-20 04:40:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:40:06,429 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2019-11-20 04:40:06,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 04:40:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2019-11-20 04:40:06,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-20 04:40:06,432 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:40:06,432 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 04:40:06,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:40:06,636 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:40:06,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:40:06,637 INFO L82 PathProgramCache]: Analyzing trace with hash -99212631, now seen corresponding path program 3 times [2019-11-20 04:40:06,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:40:06,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453028928] [2019-11-20 04:40:06,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:40:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 36 proven. 66 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-20 04:40:06,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453028928] [2019-11-20 04:40:06,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922434024] [2019-11-20 04:40:06,918 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/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 04:40:06,962 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-20 04:40:06,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:40:06,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 04:40:06,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:40:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 64 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-20 04:40:07,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:40:07,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2019-11-20 04:40:07,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729639543] [2019-11-20 04:40:07,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 04:40:07,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:40:07,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 04:40:07,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-11-20 04:40:07,063 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 15 states. [2019-11-20 04:40:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:40:07,477 INFO L93 Difference]: Finished difference Result 89 states and 139 transitions. [2019-11-20 04:40:07,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 04:40:07,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-11-20 04:40:07,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:40:07,481 INFO L225 Difference]: With dead ends: 89 [2019-11-20 04:40:07,481 INFO L226 Difference]: Without dead ends: 49 [2019-11-20 04:40:07,482 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2019-11-20 04:40:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-20 04:40:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-11-20 04:40:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-20 04:40:07,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2019-11-20 04:40:07,518 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 63 [2019-11-20 04:40:07,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:40:07,519 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2019-11-20 04:40:07,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 04:40:07,519 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2019-11-20 04:40:07,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-20 04:40:07,524 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:40:07,524 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2019-11-20 04:40:07,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:40:07,725 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:40:07,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:40:07,725 INFO L82 PathProgramCache]: Analyzing trace with hash 548614988, now seen corresponding path program 4 times [2019-11-20 04:40:07,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:40:07,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30144379] [2019-11-20 04:40:07,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:40:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-11-20 04:40:08,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30144379] [2019-11-20 04:40:08,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569279073] [2019-11-20 04:40:08,276 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/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 04:40:08,351 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 04:40:08,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:40:08,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-20 04:40:08,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:40:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-11-20 04:40:08,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:40:08,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2019-11-20 04:40:08,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454650979] [2019-11-20 04:40:08,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 04:40:08,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:40:08,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 04:40:08,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-11-20 04:40:08,766 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 20 states. [2019-11-20 04:40:09,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:40:09,036 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2019-11-20 04:40:09,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 04:40:09,037 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2019-11-20 04:40:09,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:40:09,038 INFO L225 Difference]: With dead ends: 71 [2019-11-20 04:40:09,039 INFO L226 Difference]: Without dead ends: 67 [2019-11-20 04:40:09,039 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-11-20 04:40:09,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-20 04:40:09,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2019-11-20 04:40:09,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-20 04:40:09,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 81 transitions. [2019-11-20 04:40:09,052 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 81 transitions. Word has length 105 [2019-11-20 04:40:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:40:09,054 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 81 transitions. [2019-11-20 04:40:09,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 04:40:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 81 transitions. [2019-11-20 04:40:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-20 04:40:09,056 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:40:09,056 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1] [2019-11-20 04:40:09,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:40:09,257 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:40:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:40:09,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1256539154, now seen corresponding path program 5 times [2019-11-20 04:40:09,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:40:09,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190875064] [2019-11-20 04:40:09,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:40:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 309 proven. 340 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-11-20 04:40:09,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190875064] [2019-11-20 04:40:09,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489266975] [2019-11-20 04:40:09,747 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/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 04:40:09,821 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-20 04:40:09,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:40:09,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 04:40:09,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:40:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 353 proven. 303 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2019-11-20 04:40:09,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:40:09,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 24 [2019-11-20 04:40:09,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424721138] [2019-11-20 04:40:09,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-20 04:40:09,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:40:09,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-20 04:40:09,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2019-11-20 04:40:09,986 INFO L87 Difference]: Start difference. First operand 56 states and 81 transitions. Second operand 24 states. [2019-11-20 04:40:10,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:40:10,593 INFO L93 Difference]: Finished difference Result 123 states and 212 transitions. [2019-11-20 04:40:10,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 04:40:10,593 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2019-11-20 04:40:10,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:40:10,595 INFO L225 Difference]: With dead ends: 123 [2019-11-20 04:40:10,596 INFO L226 Difference]: Without dead ends: 72 [2019-11-20 04:40:10,598 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2019-11-20 04:40:10,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-20 04:40:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2019-11-20 04:40:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-20 04:40:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2019-11-20 04:40:10,617 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 146 [2019-11-20 04:40:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:40:10,618 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2019-11-20 04:40:10,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-20 04:40:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2019-11-20 04:40:10,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-20 04:40:10,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:40:10,624 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1] [2019-11-20 04:40:10,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:40:10,825 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:40:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:40:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash 938070515, now seen corresponding path program 6 times [2019-11-20 04:40:10,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:40:10,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438951095] [2019-11-20 04:40:10,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:40:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:40:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 401 proven. 810 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2019-11-20 04:40:11,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438951095] [2019-11-20 04:40:11,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455873627] [2019-11-20 04:40:11,599 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/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 [2019-11-20 04:40:11,678 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-11-20 04:40:11,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:40:11,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 04:40:11,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:40:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 246 proven. 374 refuted. 0 times theorem prover too weak. 1960 trivial. 0 not checked. [2019-11-20 04:40:11,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:40:11,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 27 [2019-11-20 04:40:11,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893791101] [2019-11-20 04:40:11,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-20 04:40:11,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:40:11,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-20 04:40:11,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2019-11-20 04:40:11,834 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand 27 states. [2019-11-20 04:40:12,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:40:12,472 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2019-11-20 04:40:12,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-20 04:40:12,476 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 214 [2019-11-20 04:40:12,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:40:12,477 INFO L225 Difference]: With dead ends: 115 [2019-11-20 04:40:12,477 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 04:40:12,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2019-11-20 04:40:12,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 04:40:12,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 04:40:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 04:40:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 04:40:12,481 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 214 [2019-11-20 04:40:12,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:40:12,481 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 04:40:12,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-20 04:40:12,481 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 04:40:12,481 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 04:40:12,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:40:12,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 04:40:13,022 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2019-11-20 04:40:13,126 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 04:40:13,126 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 04:40:13,126 INFO L440 ceAbstractionStarter]: At program point L29(lines 23 30) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~x~0) [2019-11-20 04:40:13,126 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 04:40:13,127 INFO L444 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2019-11-20 04:40:13,127 INFO L444 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2019-11-20 04:40:13,127 INFO L440 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5)) [2019-11-20 04:40:13,127 INFO L444 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2019-11-20 04:40:13,127 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2019-11-20 04:40:13,127 INFO L444 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2019-11-20 04:40:13,127 INFO L444 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2019-11-20 04:40:13,127 INFO L444 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2019-11-20 04:40:13,128 INFO L440 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (or (not (<= |fibo_#in~n| 5)) (= fibo_~n |fibo_#in~n|)) (or (not (<= |fibo_#in~n| 4)) (< 1 fibo_~n))) [2019-11-20 04:40:13,128 INFO L444 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-11-20 04:40:13,129 INFO L440 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse2 (= fibo_~n |fibo_#in~n|)) (.cse4 (<= |fibo_#t~ret0| 1)) (.cse5 (<= 1 |fibo_#t~ret0|)) (.cse3 (<= 3 fibo_~n))) (let ((.cse1 (<= |fibo_#in~n| 4)) (.cse0 (and .cse2 (<= fibo_~n 3) .cse4 .cse5 .cse3))) (and (or (not (<= 3 |fibo_#in~n|)) .cse0 (not (<= |fibo_#in~n| 3))) (or (not (<= |fibo_#in~n| 5)) .cse1 (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3) (<= fibo_~n 5) (<= 5 fibo_~n))) (or (not .cse1) (and .cse2 (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse3) .cse0 (and .cse2 .cse4 .cse5 (<= fibo_~n 2) (< 1 fibo_~n)))))) [2019-11-20 04:40:13,129 INFO L444 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2019-11-20 04:40:13,129 INFO L444 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2019-11-20 04:40:13,129 INFO L444 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2019-11-20 04:40:13,130 INFO L447 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2019-11-20 04:40:13,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 04:40:13 BoogieIcfgContainer [2019-11-20 04:40:13,144 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 04:40:13,144 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 04:40:13,144 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 04:40:13,145 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 04:40:13,145 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:40:03" (3/4) ... [2019-11-20 04:40:13,149 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 04:40:13,157 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2019-11-20 04:40:13,167 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-20 04:40:13,167 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 04:40:13,213 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3f7052a3-4bcb-42c8-a34b-cc0a26778e31/bin/uautomizer/witness.graphml [2019-11-20 04:40:13,213 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 04:40:13,215 INFO L168 Benchmark]: Toolchain (without parser) took 10526.84 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 318.8 MB). Free memory was 946.1 MB in the beginning and 1.2 GB in the end (delta: -296.0 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-11-20 04:40:13,215 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:40:13,216 INFO L168 Benchmark]: CACSL2BoogieTranslator took 370.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -189.2 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-20 04:40:13,217 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:40:13,217 INFO L168 Benchmark]: Boogie Preprocessor took 14.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:40:13,218 INFO L168 Benchmark]: RCFGBuilder took 238.14 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: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. [2019-11-20 04:40:13,219 INFO L168 Benchmark]: TraceAbstraction took 9798.31 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 174.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -125.2 MB). Peak memory consumption was 48.9 MB. Max. memory is 11.5 GB. [2019-11-20 04:40:13,219 INFO L168 Benchmark]: Witness Printer took 69.02 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. [2019-11-20 04:40:13,222 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 370.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -189.2 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 238.14 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: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9798.31 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 174.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -125.2 MB). Peak memory consumption was 48.9 MB. Max. memory is 11.5 GB. * Witness Printer took 69.02 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: 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: 23]: Loop Invariant Derived loop invariant: 5 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 9.6s, OverallIterations: 10, TraceHistogramMax: 31, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, HoareTripleCheckerStatistics: 183 SDtfs, 419 SDslu, 822 SDs, 0 SdLazy, 1386 SolverSat, 417 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 992 GetRequests, 827 SyntacticMatches, 9 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 43 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 134 PreInvPairs, 157 NumberOfFragments, 125 HoareAnnotationTreeSize, 134 FomulaSimplifications, 185 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 312 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 1309 NumberOfCodeBlocks, 1157 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 1291 ConstructedInterpolants, 0 QuantifiedInterpolants, 365059 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1110 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 6820/9218 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! Received shutdown request...