./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/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 946ca263ceeb3f3c46f4e6e15a44f3d7052d43ca ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 18:14:27,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:14:27,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:14:27,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:14:27,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:14:27,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:14:27,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:14:27,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:14:27,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:14:27,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:14:27,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:14:27,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:14:27,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:14:27,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:14:27,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:14:27,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:14:27,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:14:27,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:14:27,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:14:27,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:14:27,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:14:27,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:14:27,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:14:27,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:14:27,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:14:27,639 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:14:27,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:14:27,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:14:27,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:14:27,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:14:27,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:14:27,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:14:27,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:14:27,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:14:27,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:14:27,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:14:27,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:14:27,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:14:27,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:14:27,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:14:27,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:14:27,645 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 18:14:27,654 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:14:27,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:14:27,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:14:27,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:14:27,656 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:14:27,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:14:27,656 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:14:27,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:14:27,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:14:27,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:14:27,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 18:14:27,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:14:27,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 18:14:27,657 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:14:27,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:14:27,657 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:14:27,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 18:14:27,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:14:27,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:14:27,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:14:27,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:14:27,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:14:27,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:14:27,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:14:27,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 18:14:27,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:14:27,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 18:14:27,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 18:14:27,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:14:27,659 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_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/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 -> 946ca263ceeb3f3c46f4e6e15a44f3d7052d43ca [2019-12-07 18:14:27,755 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:14:27,762 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:14:27,764 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:14:27,765 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:14:27,765 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:14:27,765 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2019-12-07 18:14:27,801 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/data/65f4b6175/c21a57beb5904c13bf12777c6768aed0/FLAG242ecc236 [2019-12-07 18:14:28,187 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:14:28,187 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2019-12-07 18:14:28,191 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/data/65f4b6175/c21a57beb5904c13bf12777c6768aed0/FLAG242ecc236 [2019-12-07 18:14:28,199 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/data/65f4b6175/c21a57beb5904c13bf12777c6768aed0 [2019-12-07 18:14:28,201 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:14:28,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:14:28,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:14:28,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:14:28,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:14:28,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:14:28" (1/1) ... [2019-12-07 18:14:28,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31e4a9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:14:28, skipping insertion in model container [2019-12-07 18:14:28,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:14:28" (1/1) ... [2019-12-07 18:14:28,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:14:28,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:14:28,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:14:28,319 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:14:28,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:14:28,375 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:14:28,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:14:28 WrapperNode [2019-12-07 18:14:28,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:14:28,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:14:28,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:14:28,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:14:28,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:14:28" (1/1) ... [2019-12-07 18:14:28,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:14:28" (1/1) ... [2019-12-07 18:14:28,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:14:28,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:14:28,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:14:28,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:14:28,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:14:28" (1/1) ... [2019-12-07 18:14:28,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:14:28" (1/1) ... [2019-12-07 18:14:28,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:14:28" (1/1) ... [2019-12-07 18:14:28,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:14:28" (1/1) ... [2019-12-07 18:14:28,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:14:28" (1/1) ... [2019-12-07 18:14:28,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:14:28" (1/1) ... [2019-12-07 18:14:28,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:14:28" (1/1) ... [2019-12-07 18:14:28,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:14:28,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:14:28,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:14:28,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:14:28,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:14:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/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 [2019-12-07 18:14:28,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:14:28,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:14:28,453 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-12-07 18:14:28,453 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-12-07 18:14:28,543 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:14:28,543 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 18:14:28,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:14:28 BoogieIcfgContainer [2019-12-07 18:14:28,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:14:28,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:14:28,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:14:28,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:14:28,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:14:28" (1/3) ... [2019-12-07 18:14:28,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c90831a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:14:28, skipping insertion in model container [2019-12-07 18:14:28,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:14:28" (2/3) ... [2019-12-07 18:14:28,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c90831a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:14:28, skipping insertion in model container [2019-12-07 18:14:28,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:14:28" (3/3) ... [2019-12-07 18:14:28,550 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2019-12-07 18:14:28,557 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:14:28,561 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 18:14:28,569 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 18:14:28,584 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:14:28,585 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 18:14:28,585 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:14:28,585 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:14:28,585 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:14:28,585 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:14:28,585 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:14:28,585 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:14:28,596 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-12-07 18:14:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 18:14:28,599 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:28,600 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:28,600 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:28,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:28,604 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-12-07 18:14:28,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:28,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216275311] [2019-12-07 18:14:28,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:14:28,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216275311] [2019-12-07 18:14:28,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:14:28,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 18:14:28,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061356583] [2019-12-07 18:14:28,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:14:28,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:28,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:14:28,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:14:28,743 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-12-07 18:14:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:28,788 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-12-07 18:14:28,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:14:28,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 18:14:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:28,797 INFO L225 Difference]: With dead ends: 24 [2019-12-07 18:14:28,797 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 18:14:28,799 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 [2019-12-07 18:14:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 18:14:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-12-07 18:14:28,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 18:14:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-12-07 18:14:28,825 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-12-07 18:14:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:28,825 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-12-07 18:14:28,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:14:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-12-07 18:14:28,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 18:14:28,826 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:28,827 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:28,827 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:28,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:28,827 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-12-07 18:14:28,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:28,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788485036] [2019-12-07 18:14:28,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:14:28,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788485036] [2019-12-07 18:14:28,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561307122] [2019-12-07 18:14:28,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/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 [2019-12-07 18:14:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:28,917 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 18:14:28,922 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:14:28,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:14:28,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-12-07 18:14:28,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012294626] [2019-12-07 18:14:28,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:14:28,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:28,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:14:28,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:14:28,971 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-12-07 18:14:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:29,007 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-12-07 18:14:29,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:14:29,008 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-12-07 18:14:29,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:29,008 INFO L225 Difference]: With dead ends: 21 [2019-12-07 18:14:29,009 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 18:14:29,009 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:14:29,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 18:14:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 18:14:29,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 18:14:29,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-12-07 18:14:29,013 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-12-07 18:14:29,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:29,013 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-12-07 18:14:29,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:14:29,013 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-12-07 18:14:29,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 18:14:29,014 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:29,014 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:29,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:29,215 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:29,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:29,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-12-07 18:14:29,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:29,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827831125] [2019-12-07 18:14:29,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 18:14:29,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827831125] [2019-12-07 18:14:29,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951033490] [2019-12-07 18:14:29,384 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/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 [2019-12-07 18:14:29,412 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:14:29,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:14:29,413 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 18:14:29,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 18:14:29,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:14:29,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-12-07 18:14:29,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59591192] [2019-12-07 18:14:29,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 18:14:29,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:29,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 18:14:29,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:14:29,446 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2019-12-07 18:14:29,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:29,502 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-12-07 18:14:29,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:14:29,503 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-12-07 18:14:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:29,504 INFO L225 Difference]: With dead ends: 24 [2019-12-07 18:14:29,504 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 18:14:29,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:14:29,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 18:14:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 18:14:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 18:14:29,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-12-07 18:14:29,511 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-12-07 18:14:29,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:29,512 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-12-07 18:14:29,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 18:14:29,512 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-12-07 18:14:29,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 18:14:29,514 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:29,514 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:29,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:29,715 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:29,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:29,715 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-12-07 18:14:29,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:29,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112556983] [2019-12-07 18:14:29,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 18:14:29,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112556983] [2019-12-07 18:14:29,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174678361] [2019-12-07 18:14:29,812 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/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 [2019-12-07 18:14:29,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 18:14:29,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:14:29,836 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 18:14:29,837 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 18:14:29,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:14:29,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2019-12-07 18:14:29,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043022965] [2019-12-07 18:14:29,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 18:14:29,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:29,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:14:29,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:14:29,862 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2019-12-07 18:14:29,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:29,915 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-12-07 18:14:29,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 18:14:29,916 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-12-07 18:14:29,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:29,917 INFO L225 Difference]: With dead ends: 27 [2019-12-07 18:14:29,917 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 18:14:29,918 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-07 18:14:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 18:14:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-12-07 18:14:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 18:14:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-12-07 18:14:29,923 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-12-07 18:14:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:29,923 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-12-07 18:14:29,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 18:14:29,923 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-12-07 18:14:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-07 18:14:29,925 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:29,925 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:30,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:30,126 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:30,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:30,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-12-07 18:14:30,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:30,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817551170] [2019-12-07 18:14:30,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 18:14:30,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817551170] [2019-12-07 18:14:30,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996432537] [2019-12-07 18:14:30,249 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/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 [2019-12-07 18:14:30,268 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:14:30,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:14:30,269 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 18:14:30,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 18:14:30,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:14:30,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-12-07 18:14:30,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714428648] [2019-12-07 18:14:30,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 18:14:30,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:30,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 18:14:30,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-07 18:14:30,298 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 11 states. [2019-12-07 18:14:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:30,349 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-12-07 18:14:30,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:14:30,349 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2019-12-07 18:14:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:30,350 INFO L225 Difference]: With dead ends: 30 [2019-12-07 18:14:30,350 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 18:14:30,351 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-07 18:14:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 18:14:30,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 18:14:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:14:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-12-07 18:14:30,356 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-12-07 18:14:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:30,357 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-12-07 18:14:30,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 18:14:30,357 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-12-07 18:14:30,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 18:14:30,358 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:30,358 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:30,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:30,559 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:30,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:30,560 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-12-07 18:14:30,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:30,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353904453] [2019-12-07 18:14:30,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 18:14:30,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353904453] [2019-12-07 18:14:30,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167174773] [2019-12-07 18:14:30,699 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/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 [2019-12-07 18:14:30,723 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 18:14:30,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:14:30,724 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 18:14:30,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 18:14:30,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:14:30,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2019-12-07 18:14:30,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289324643] [2019-12-07 18:14:30,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 18:14:30,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:30,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 18:14:30,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:14:30,756 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2019-12-07 18:14:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:30,812 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-12-07 18:14:30,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 18:14:30,813 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2019-12-07 18:14:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:30,814 INFO L225 Difference]: With dead ends: 33 [2019-12-07 18:14:30,814 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 18:14:30,814 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-07 18:14:30,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 18:14:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-12-07 18:14:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 18:14:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-12-07 18:14:30,818 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-12-07 18:14:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:30,818 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-12-07 18:14:30,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 18:14:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-12-07 18:14:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 18:14:30,820 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:30,820 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:31,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:31,021 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:31,022 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-12-07 18:14:31,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:31,023 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105691401] [2019-12-07 18:14:31,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-12-07 18:14:31,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105691401] [2019-12-07 18:14:31,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217775128] [2019-12-07 18:14:31,234 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/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 [2019-12-07 18:14:31,261 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-07 18:14:31,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:14:31,262 INFO L264 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 18:14:31,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-12-07 18:14:31,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:14:31,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2019-12-07 18:14:31,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141778842] [2019-12-07 18:14:31,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 18:14:31,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:31,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 18:14:31,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-07 18:14:31,297 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 13 states. [2019-12-07 18:14:31,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:31,365 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-12-07 18:14:31,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 18:14:31,365 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2019-12-07 18:14:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:31,366 INFO L225 Difference]: With dead ends: 36 [2019-12-07 18:14:31,366 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 18:14:31,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-12-07 18:14:31,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 18:14:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-07 18:14:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 18:14:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-12-07 18:14:31,372 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-12-07 18:14:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:31,372 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-12-07 18:14:31,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 18:14:31,372 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-12-07 18:14:31,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-07 18:14:31,374 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:31,374 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:31,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:31,575 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:31,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:31,575 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-12-07 18:14:31,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:31,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123697325] [2019-12-07 18:14:31,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,709 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 18:14:31,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123697325] [2019-12-07 18:14:31,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956936609] [2019-12-07 18:14:31,710 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/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 [2019-12-07 18:14:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:31,734 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 18:14:31,736 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 18:14:31,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:14:31,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2019-12-07 18:14:31,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764944159] [2019-12-07 18:14:31,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 18:14:31,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:31,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 18:14:31,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-07 18:14:31,768 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2019-12-07 18:14:31,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:31,837 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-12-07 18:14:31,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 18:14:31,837 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2019-12-07 18:14:31,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:31,838 INFO L225 Difference]: With dead ends: 39 [2019-12-07 18:14:31,838 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 18:14:31,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2019-12-07 18:14:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 18:14:31,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-12-07 18:14:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 18:14:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-12-07 18:14:31,842 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-12-07 18:14:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:31,843 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-12-07 18:14:31,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 18:14:31,843 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-12-07 18:14:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-12-07 18:14:31,843 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:31,844 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:32,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:32,045 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:32,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:32,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-12-07 18:14:32,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:32,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369896503] [2019-12-07 18:14:32,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-12-07 18:14:32,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369896503] [2019-12-07 18:14:32,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89897016] [2019-12-07 18:14:32,225 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/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 [2019-12-07 18:14:32,254 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:14:32,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:14:32,255 INFO L264 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 18:14:32,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-12-07 18:14:32,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:14:32,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-12-07 18:14:32,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076771855] [2019-12-07 18:14:32,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 18:14:32,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:32,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 18:14:32,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-07 18:14:32,295 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 15 states. [2019-12-07 18:14:32,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:32,370 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-12-07 18:14:32,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 18:14:32,371 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2019-12-07 18:14:32,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:32,372 INFO L225 Difference]: With dead ends: 42 [2019-12-07 18:14:32,372 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 18:14:32,372 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2019-12-07 18:14:32,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 18:14:32,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-07 18:14:32,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 18:14:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-12-07 18:14:32,376 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-12-07 18:14:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:32,377 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-12-07 18:14:32,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 18:14:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-12-07 18:14:32,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-12-07 18:14:32,378 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:32,378 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:32,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:32,579 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:32,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:32,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-12-07 18:14:32,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:32,580 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002865866] [2019-12-07 18:14:32,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 18:14:32,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002865866] [2019-12-07 18:14:32,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039442001] [2019-12-07 18:14:32,823 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:32,849 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-07 18:14:32,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:14:32,850 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 18:14:32,852 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 18:14:32,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:14:32,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2019-12-07 18:14:32,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632475805] [2019-12-07 18:14:32,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 18:14:32,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:32,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 18:14:32,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-07 18:14:32,888 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 16 states. [2019-12-07 18:14:32,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:32,966 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-12-07 18:14:32,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 18:14:32,967 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2019-12-07 18:14:32,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:32,968 INFO L225 Difference]: With dead ends: 45 [2019-12-07 18:14:32,968 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 18:14:32,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2019-12-07 18:14:32,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 18:14:32,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-12-07 18:14:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 18:14:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-12-07 18:14:32,973 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-12-07 18:14:32,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:32,974 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-12-07 18:14:32,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 18:14:32,974 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-12-07 18:14:32,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-12-07 18:14:32,975 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:32,975 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:33,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:33,176 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:33,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:33,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-12-07 18:14:33,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:33,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354385564] [2019-12-07 18:14:33,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-12-07 18:14:33,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354385564] [2019-12-07 18:14:33,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176959541] [2019-12-07 18:14:33,361 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:33,391 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:14:33,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:14:33,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 18:14:33,395 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-12-07 18:14:33,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:14:33,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2019-12-07 18:14:33,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211663678] [2019-12-07 18:14:33,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 18:14:33,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:33,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 18:14:33,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-12-07 18:14:33,428 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2019-12-07 18:14:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:33,514 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-12-07 18:14:33,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 18:14:33,514 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2019-12-07 18:14:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:33,515 INFO L225 Difference]: With dead ends: 48 [2019-12-07 18:14:33,515 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 18:14:33,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2019-12-07 18:14:33,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 18:14:33,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-07 18:14:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 18:14:33,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-12-07 18:14:33,521 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-12-07 18:14:33,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:33,522 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-12-07 18:14:33,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 18:14:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-12-07 18:14:33,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-12-07 18:14:33,523 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:33,523 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:33,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:33,724 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:33,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:33,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-12-07 18:14:33,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:33,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219942322] [2019-12-07 18:14:33,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-12-07 18:14:34,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219942322] [2019-12-07 18:14:34,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248678778] [2019-12-07 18:14:34,018 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:34,056 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-12-07 18:14:34,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:14:34,058 INFO L264 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 18:14:34,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-12-07 18:14:34,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:14:34,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2019-12-07 18:14:34,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588608246] [2019-12-07 18:14:34,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 18:14:34,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:34,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 18:14:34,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2019-12-07 18:14:34,101 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 18 states. [2019-12-07 18:14:34,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:34,199 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-12-07 18:14:34,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 18:14:34,200 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2019-12-07 18:14:34,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:34,201 INFO L225 Difference]: With dead ends: 51 [2019-12-07 18:14:34,201 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 18:14:34,202 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2019-12-07 18:14:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 18:14:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-12-07 18:14:34,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 18:14:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-12-07 18:14:34,207 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-12-07 18:14:34,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:34,207 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-12-07 18:14:34,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 18:14:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-12-07 18:14:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-12-07 18:14:34,208 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:34,208 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:34,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:34,409 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:34,410 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-12-07 18:14:34,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:34,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688853148] [2019-12-07 18:14:34,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-12-07 18:14:34,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688853148] [2019-12-07 18:14:34,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967936043] [2019-12-07 18:14:34,719 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:34,757 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-07 18:14:34,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:14:34,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 18:14:34,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-12-07 18:14:34,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:14:34,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2019-12-07 18:14:34,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141177448] [2019-12-07 18:14:34,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 18:14:34,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:34,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 18:14:34,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-12-07 18:14:34,799 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 19 states. [2019-12-07 18:14:34,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:34,910 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-12-07 18:14:34,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 18:14:34,910 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2019-12-07 18:14:34,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:34,911 INFO L225 Difference]: With dead ends: 54 [2019-12-07 18:14:34,911 INFO L226 Difference]: Without dead ends: 50 [2019-12-07 18:14:34,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2019-12-07 18:14:34,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-07 18:14:34,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-07 18:14:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 18:14:34,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-12-07 18:14:34,915 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-12-07 18:14:34,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:34,915 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-12-07 18:14:34,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 18:14:34,915 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-12-07 18:14:34,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-12-07 18:14:34,916 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:34,916 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:35,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:35,117 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:35,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:35,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-12-07 18:14:35,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:35,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724059553] [2019-12-07 18:14:35,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-12-07 18:14:35,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724059553] [2019-12-07 18:14:35,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594758083] [2019-12-07 18:14:35,423 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 18:14:35,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-12-07 18:14:35,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:14:35,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2019-12-07 18:14:35,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003862906] [2019-12-07 18:14:35,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 18:14:35,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:35,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 18:14:35,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2019-12-07 18:14:35,495 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 20 states. [2019-12-07 18:14:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:35,605 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-12-07 18:14:35,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 18:14:35,606 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 87 [2019-12-07 18:14:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:35,606 INFO L225 Difference]: With dead ends: 57 [2019-12-07 18:14:35,606 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 18:14:35,607 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 18:14:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 18:14:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-07 18:14:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 18:14:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-12-07 18:14:35,610 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-12-07 18:14:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:35,610 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-12-07 18:14:35,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 18:14:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-12-07 18:14:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-12-07 18:14:35,611 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:35,611 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:35,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:35,813 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:35,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:35,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-12-07 18:14:35,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:35,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111369864] [2019-12-07 18:14:35,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-12-07 18:14:36,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111369864] [2019-12-07 18:14:36,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448257731] [2019-12-07 18:14:36,194 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:36,223 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:14:36,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:14:36,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 18:14:36,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-12-07 18:14:36,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:14:36,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2019-12-07 18:14:36,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745078880] [2019-12-07 18:14:36,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 18:14:36,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:36,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 18:14:36,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2019-12-07 18:14:36,265 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2019-12-07 18:14:36,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:36,387 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-12-07 18:14:36,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 18:14:36,388 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2019-12-07 18:14:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:36,388 INFO L225 Difference]: With dead ends: 60 [2019-12-07 18:14:36,389 INFO L226 Difference]: Without dead ends: 56 [2019-12-07 18:14:36,389 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 18:14:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-07 18:14:36,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-07 18:14:36,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-07 18:14:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-12-07 18:14:36,395 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-12-07 18:14:36,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:36,395 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-12-07 18:14:36,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 18:14:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-12-07 18:14:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-12-07 18:14:36,396 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:36,397 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:36,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:36,597 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:36,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:36,598 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-12-07 18:14:36,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:36,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276499656] [2019-12-07 18:14:36,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-12-07 18:14:37,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276499656] [2019-12-07 18:14:37,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562266984] [2019-12-07 18:14:37,363 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:37,398 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-12-07 18:14:37,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:14:37,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 67 conjunts are in the unsatisfiable core [2019-12-07 18:14:37,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-12-07 18:14:37,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:14:37,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2019-12-07 18:14:37,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039423299] [2019-12-07 18:14:37,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-07 18:14:37,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:37,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-07 18:14:37,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 18:14:37,439 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 35 states. [2019-12-07 18:14:37,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:37,734 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-12-07 18:14:37,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-07 18:14:37,735 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 99 [2019-12-07 18:14:37,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:37,735 INFO L225 Difference]: With dead ends: 63 [2019-12-07 18:14:37,735 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 18:14:37,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 18:14:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 18:14:37,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-12-07 18:14:37,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-07 18:14:37,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-12-07 18:14:37,739 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-12-07 18:14:37,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:37,739 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-12-07 18:14:37,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-07 18:14:37,740 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-12-07 18:14:37,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-12-07 18:14:37,740 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:14:37,740 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:14:37,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:37,941 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:14:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:14:37,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-12-07 18:14:37,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:14:37,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484851932] [2019-12-07 18:14:37,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:14:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:14:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 32 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-12-07 18:14:38,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484851932] [2019-12-07 18:14:38,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217491808] [2019-12-07 18:14:38,285 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:38,316 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:14:38,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:14:38,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-07 18:14:38,319 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:14:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-12-07 18:14:38,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:14:38,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 23 [2019-12-07 18:14:38,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937705045] [2019-12-07 18:14:38,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 18:14:38,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:14:38,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 18:14:38,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2019-12-07 18:14:38,362 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 21 states. [2019-12-07 18:14:38,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:14:38,558 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2019-12-07 18:14:38,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 18:14:38,559 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2019-12-07 18:14:38,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:14:38,559 INFO L225 Difference]: With dead ends: 59 [2019-12-07 18:14:38,559 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 18:14:38,560 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=521, Invalid=1039, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 18:14:38,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 18:14:38,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 18:14:38,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 18:14:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 18:14:38,560 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2019-12-07 18:14:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:14:38,561 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 18:14:38,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 18:14:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 18:14:38,561 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 18:14:38,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:14:38,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 18:14:38,797 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 18:14:38,797 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 18:14:38,798 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 18:14:38,798 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-12-07 18:14:38,798 INFO L246 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2019-12-07 18:14:38,798 INFO L246 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2019-12-07 18:14:38,798 INFO L242 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= ULTIMATE.start_main_~input~0 15) (<= 15 ULTIMATE.start_main_~input~0)) [2019-12-07 18:14:38,799 INFO L246 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-12-07 18:14:38,799 INFO L246 CegarLoopResult]: For program point L9(lines 9 15) no Hoare annotation was computed. [2019-12-07 18:14:38,799 INFO L246 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2019-12-07 18:14:38,799 INFO L246 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2019-12-07 18:14:38,799 INFO L249 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2019-12-07 18:14:38,799 INFO L242 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2019-12-07 18:14:38,799 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-12-07 18:14:38,799 INFO L246 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-12-07 18:14:38,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:14:38 BoogieIcfgContainer [2019-12-07 18:14:38,806 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:14:38,807 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:14:38,807 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:14:38,807 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:14:38,808 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:14:28" (3/4) ... [2019-12-07 18:14:38,812 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 18:14:38,818 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-12-07 18:14:38,821 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 18:14:38,821 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 18:14:38,846 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5b6f5cc1-827e-4baa-84f0-97a9bb9f13ee/bin/uautomizer/witness.graphml [2019-12-07 18:14:38,846 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:14:38,847 INFO L168 Benchmark]: Toolchain (without parser) took 10644.85 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 232.3 MB). Free memory was 940.7 MB in the beginning and 903.4 MB in the end (delta: 37.3 MB). Peak memory consumption was 269.5 MB. Max. memory is 11.5 GB. [2019-12-07 18:14:38,847 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:14:38,848 INFO L168 Benchmark]: CACSL2BoogieTranslator took 173.31 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -151.1 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2019-12-07 18:14:38,848 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.06 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:14:38,848 INFO L168 Benchmark]: Boogie Preprocessor took 11.10 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:14:38,848 INFO L168 Benchmark]: RCFGBuilder took 136.56 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 18:14:38,848 INFO L168 Benchmark]: TraceAbstraction took 10261.43 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 135.3 MB). Free memory was 1.1 GB in the beginning and 914.4 MB in the end (delta: 160.9 MB). Peak memory consumption was 296.1 MB. Max. memory is 11.5 GB. [2019-12-07 18:14:38,849 INFO L168 Benchmark]: Witness Printer took 39.00 ms. Allocated memory is still 1.3 GB. Free memory was 914.4 MB in the beginning and 903.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 11.5 GB. [2019-12-07 18:14:38,850 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 173.31 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -151.1 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.06 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.10 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 136.56 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10261.43 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 135.3 MB). Free memory was 1.1 GB in the beginning and 914.4 MB in the end (delta: 160.9 MB). Peak memory consumption was 296.1 MB. Max. memory is 11.5 GB. * Witness Printer took 39.00 ms. Allocated memory is still 1.3 GB. Free memory was 914.4 MB in the beginning and 903.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 10.1s, OverallIterations: 17, TraceHistogramMax: 17, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 216 SDtfs, 407 SDslu, 1746 SDs, 0 SdLazy, 1369 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1591 GetRequests, 1221 SyntacticMatches, 1 SemanticMatches, 369 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 1929 NumberOfCodeBlocks, 1929 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 1896 ConstructedInterpolants, 0 QuantifiedInterpolants, 376688 SizeOfPredicates, 152 NumberOfNonLiveVariables, 2272 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 33 InterpolantComputations, 2 PerfectInterpolantSequences, 5376/9248 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...