./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i15_o15-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i15_o15-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/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 ad4e6ad99a266ddeead98987e8e44db723af5bc7 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 23:46:26,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:46:26,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:46:26,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:46:26,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:46:26,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:46:26,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:46:26,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:46:26,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:46:26,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:46:26,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:46:26,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:46:26,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:46:26,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:46:26,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:46:26,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:46:26,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:46:26,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:46:26,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:46:26,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:46:26,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:46:26,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:46:26,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:46:26,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:46:26,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:46:26,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:46:26,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:46:26,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:46:26,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:46:26,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:46:26,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:46:26,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:46:26,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:46:26,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:46:26,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:46:26,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:46:26,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:46:26,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:46:26,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:46:26,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:46:26,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:46:26,655 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 23:46:26,679 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:46:26,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:46:26,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:46:26,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:46:26,681 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:46:26,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:46:26,682 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 23:46:26,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 23:46:26,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 23:46:26,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:46:26,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:46:26,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:46:26,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:46:26,683 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 23:46:26,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:46:26,684 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:46:26,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:46:26,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:46:26,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:46:26,684 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:46:26,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:46:26,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:46:26,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:46:26,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:46:26,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:46:26,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 23:46:26,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 23:46:26,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:46:26,696 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_9d77a7c5-3e08-4cee-84db-1002de13ef2c/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 -> ad4e6ad99a266ddeead98987e8e44db723af5bc7 [2019-11-15 23:46:26,731 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:46:26,742 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:46:26,745 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:46:26,747 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:46:26,747 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:46:26,748 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i15_o15-2.c [2019-11-15 23:46:26,805 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/data/bff421ef7/c569297e98e8495c98b2c8614ab9b788/FLAG2f201c2bc [2019-11-15 23:46:27,205 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:46:27,205 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/sv-benchmarks/c/recursive-simple/id_i15_o15-2.c [2019-11-15 23:46:27,211 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/data/bff421ef7/c569297e98e8495c98b2c8614ab9b788/FLAG2f201c2bc [2019-11-15 23:46:27,227 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/data/bff421ef7/c569297e98e8495c98b2c8614ab9b788 [2019-11-15 23:46:27,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:46:27,232 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:46:27,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:46:27,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:46:27,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:46:27,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:46:27" (1/1) ... [2019-11-15 23:46:27,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38cb2b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:46:27, skipping insertion in model container [2019-11-15 23:46:27,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:46:27" (1/1) ... [2019-11-15 23:46:27,253 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:46:27,269 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:46:27,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:46:27,470 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:46:27,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:46:27,561 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:46:27,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:46:27 WrapperNode [2019-11-15 23:46:27,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:46:27,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:46:27,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:46:27,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:46:27,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:46:27" (1/1) ... [2019-11-15 23:46:27,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:46:27" (1/1) ... [2019-11-15 23:46:27,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:46:27,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:46:27,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:46:27,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:46:27,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:46:27" (1/1) ... [2019-11-15 23:46:27,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:46:27" (1/1) ... [2019-11-15 23:46:27,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:46:27" (1/1) ... [2019-11-15 23:46:27,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:46:27" (1/1) ... [2019-11-15 23:46:27,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:46:27" (1/1) ... [2019-11-15 23:46:27,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:46:27" (1/1) ... [2019-11-15 23:46:27,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:46:27" (1/1) ... [2019-11-15 23:46:27,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:46:27,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:46:27,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:46:27,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:46:27,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:46:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:46:27,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:46:27,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:46:27,670 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-15 23:46:27,670 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-15 23:46:27,835 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:46:27,835 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-15 23:46:27,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:46:27 BoogieIcfgContainer [2019-11-15 23:46:27,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:46:27,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:46:27,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:46:27,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:46:27,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:46:27" (1/3) ... [2019-11-15 23:46:27,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589945d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:46:27, skipping insertion in model container [2019-11-15 23:46:27,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:46:27" (2/3) ... [2019-11-15 23:46:27,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589945d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:46:27, skipping insertion in model container [2019-11-15 23:46:27,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:46:27" (3/3) ... [2019-11-15 23:46:27,846 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-2.c [2019-11-15 23:46:27,855 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:46:27,862 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 23:46:27,873 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 23:46:27,899 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:46:27,899 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:46:27,900 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:46:27,900 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:46:27,900 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:46:27,901 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:46:27,901 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:46:27,901 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:46:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-15 23:46:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-15 23:46:27,926 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:27,927 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:27,928 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:27,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:27,934 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-15 23:46:27,942 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:27,942 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715079335] [2019-11-15 23:46:27,942 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:27,943 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:27,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:46:28,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715079335] [2019-11-15 23:46:28,227 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:46:28,227 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-15 23:46:28,227 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744753733] [2019-11-15 23:46:28,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:46:28,234 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:46:28,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:46:28,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:46:28,246 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-11-15 23:46:28,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:46:28,345 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-15 23:46:28,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:46:28,346 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-15 23:46:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:46:28,353 INFO L225 Difference]: With dead ends: 24 [2019-11-15 23:46:28,354 INFO L226 Difference]: Without dead ends: 14 [2019-11-15 23:46:28,357 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:46:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-15 23:46:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-15 23:46:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-15 23:46:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-15 23:46:28,394 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-15 23:46:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:46:28,395 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-15 23:46:28,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:46:28,395 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-15 23:46:28,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-15 23:46:28,396 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:28,396 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:28,397 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:28,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:28,397 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-15 23:46:28,397 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:28,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415130425] [2019-11-15 23:46:28,398 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:28,398 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:28,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:46:28,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415130425] [2019-11-15 23:46:28,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447980717] [2019-11-15 23:46:28,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:28,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:46:28,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:46:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:46:28,653 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:46:28,654 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2019-11-15 23:46:28,654 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782420096] [2019-11-15 23:46:28,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 23:46:28,657 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:46:28,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 23:46:28,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:46:28,659 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 10 states. [2019-11-15 23:46:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:46:28,769 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-15 23:46:28,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 23:46:28,771 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-15 23:46:28,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:46:28,772 INFO L225 Difference]: With dead ends: 21 [2019-11-15 23:46:28,772 INFO L226 Difference]: Without dead ends: 17 [2019-11-15 23:46:28,773 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-11-15 23:46:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-15 23:46:28,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-15 23:46:28,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-15 23:46:28,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-15 23:46:28,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-15 23:46:28,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:46:28,778 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-15 23:46:28,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 23:46:28,778 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-15 23:46:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-15 23:46:28,781 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:28,782 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:28,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:28,983 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:28,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:28,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-15 23:46:28,983 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:28,984 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270120353] [2019-11-15 23:46:28,984 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:28,984 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:28,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-15 23:46:29,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270120353] [2019-11-15 23:46:29,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359864955] [2019-11-15 23:46:29,157 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:29,218 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:46:29,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:46:29,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:46:29,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:46:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-15 23:46:29,261 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:46:29,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2019-11-15 23:46:29,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618139148] [2019-11-15 23:46:29,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 23:46:29,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:46:29,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 23:46:29,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:46:29,262 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2019-11-15 23:46:29,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:46:29,351 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-15 23:46:29,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 23:46:29,352 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-11-15 23:46:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:46:29,353 INFO L225 Difference]: With dead ends: 24 [2019-11-15 23:46:29,353 INFO L226 Difference]: Without dead ends: 20 [2019-11-15 23:46:29,354 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-11-15 23:46:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-15 23:46:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-15 23:46:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-15 23:46:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-15 23:46:29,359 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-15 23:46:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:46:29,359 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-15 23:46:29,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 23:46:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-15 23:46:29,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-15 23:46:29,360 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:29,361 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:29,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:29,567 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:29,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:29,568 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-15 23:46:29,568 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:29,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022318655] [2019-11-15 23:46:29,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:29,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:29,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 23:46:29,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022318655] [2019-11-15 23:46:29,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271414648] [2019-11-15 23:46:29,765 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:29,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-15 23:46:29,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:46:29,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 23:46:29,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:46:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 23:46:29,859 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:46:29,859 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2019-11-15 23:46:29,859 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134752567] [2019-11-15 23:46:29,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 23:46:29,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:46:29,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 23:46:29,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-15 23:46:29,860 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 12 states. [2019-11-15 23:46:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:46:29,988 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-15 23:46:29,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 23:46:29,989 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-15 23:46:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:46:29,990 INFO L225 Difference]: With dead ends: 27 [2019-11-15 23:46:29,990 INFO L226 Difference]: Without dead ends: 23 [2019-11-15 23:46:29,991 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-15 23:46:29,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-15 23:46:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-15 23:46:29,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-15 23:46:29,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-15 23:46:29,999 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-15 23:46:30,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:46:30,000 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-15 23:46:30,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 23:46:30,001 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-15 23:46:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 23:46:30,004 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:30,004 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:30,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:30,208 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:30,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:30,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-15 23:46:30,209 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:30,209 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539173225] [2019-11-15 23:46:30,209 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:30,209 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:30,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-15 23:46:30,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539173225] [2019-11-15 23:46:30,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707901113] [2019-11-15 23:46:30,423 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:30,459 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 23:46:30,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:46:30,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-15 23:46:30,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:46:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-15 23:46:30,522 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:46:30,523 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2019-11-15 23:46:30,523 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821951755] [2019-11-15 23:46:30,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-15 23:46:30,526 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:46:30,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-15 23:46:30,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-15 23:46:30,527 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 13 states. [2019-11-15 23:46:30,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:46:30,639 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-15 23:46:30,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 23:46:30,640 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-11-15 23:46:30,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:46:30,641 INFO L225 Difference]: With dead ends: 30 [2019-11-15 23:46:30,641 INFO L226 Difference]: Without dead ends: 26 [2019-11-15 23:46:30,641 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-11-15 23:46:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-15 23:46:30,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-15 23:46:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 23:46:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-15 23:46:30,648 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-15 23:46:30,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:46:30,648 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-15 23:46:30,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-15 23:46:30,649 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-15 23:46:30,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-15 23:46:30,650 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:30,650 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:30,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:30,851 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:30,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:30,851 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-15 23:46:30,852 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:30,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380663788] [2019-11-15 23:46:30,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:30,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:30,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-15 23:46:31,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380663788] [2019-11-15 23:46:31,096 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564440168] [2019-11-15 23:46:31,096 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:31,138 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-15 23:46:31,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:46:31,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-15 23:46:31,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:46:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-15 23:46:31,193 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:46:31,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2019-11-15 23:46:31,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070294778] [2019-11-15 23:46:31,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-15 23:46:31,195 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:46:31,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-15 23:46:31,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-15 23:46:31,195 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 14 states. [2019-11-15 23:46:31,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:46:31,337 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-15 23:46:31,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 23:46:31,338 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2019-11-15 23:46:31,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:46:31,339 INFO L225 Difference]: With dead ends: 33 [2019-11-15 23:46:31,339 INFO L226 Difference]: Without dead ends: 29 [2019-11-15 23:46:31,340 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2019-11-15 23:46:31,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-15 23:46:31,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-15 23:46:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-15 23:46:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-15 23:46:31,345 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-15 23:46:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:46:31,345 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-15 23:46:31,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-15 23:46:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-15 23:46:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-15 23:46:31,347 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:31,347 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:31,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:31,553 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:31,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:31,554 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-15 23:46:31,554 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:31,554 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880232478] [2019-11-15 23:46:31,554 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:31,554 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:31,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-15 23:46:31,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880232478] [2019-11-15 23:46:31,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502012768] [2019-11-15 23:46:31,760 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:31,812 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-15 23:46:31,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:46:31,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-15 23:46:31,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:46:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-15 23:46:32,089 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:46:32,089 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2019-11-15 23:46:32,089 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102108942] [2019-11-15 23:46:32,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-15 23:46:32,090 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:46:32,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-15 23:46:32,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2019-11-15 23:46:32,091 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 28 states. [2019-11-15 23:46:32,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:46:32,463 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-15 23:46:32,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-15 23:46:32,463 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 45 [2019-11-15 23:46:32,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:46:32,464 INFO L225 Difference]: With dead ends: 36 [2019-11-15 23:46:32,465 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 23:46:32,466 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2019-11-15 23:46:32,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 23:46:32,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-15 23:46:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-15 23:46:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-15 23:46:32,471 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-15 23:46:32,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:46:32,471 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-15 23:46:32,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-15 23:46:32,471 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-15 23:46:32,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-15 23:46:32,473 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:32,473 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:32,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:32,680 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:32,680 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-15 23:46:32,680 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:32,680 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666862637] [2019-11-15 23:46:32,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:32,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:32,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-15 23:46:32,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666862637] [2019-11-15 23:46:32,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294447775] [2019-11-15 23:46:32,968 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:33,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-15 23:46:33,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:46:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-15 23:46:33,084 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:46:33,084 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2019-11-15 23:46:33,084 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464438885] [2019-11-15 23:46:33,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-15 23:46:33,085 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:46:33,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-15 23:46:33,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-11-15 23:46:33,086 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2019-11-15 23:46:33,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:46:33,229 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-15 23:46:33,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-15 23:46:33,230 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2019-11-15 23:46:33,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:46:33,231 INFO L225 Difference]: With dead ends: 39 [2019-11-15 23:46:33,231 INFO L226 Difference]: Without dead ends: 35 [2019-11-15 23:46:33,232 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2019-11-15 23:46:33,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-15 23:46:33,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-15 23:46:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-15 23:46:33,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-15 23:46:33,238 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-15 23:46:33,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:46:33,238 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-15 23:46:33,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-15 23:46:33,238 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-15 23:46:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-15 23:46:33,246 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:33,246 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:33,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:33,450 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:33,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:33,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-15 23:46:33,451 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:33,451 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119049870] [2019-11-15 23:46:33,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:33,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:33,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-15 23:46:33,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119049870] [2019-11-15 23:46:33,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499081561] [2019-11-15 23:46:33,714 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:33,767 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:46:33,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:46:33,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-15 23:46:33,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:46:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-15 23:46:33,829 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:46:33,830 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2019-11-15 23:46:33,830 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432286190] [2019-11-15 23:46:33,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-15 23:46:33,831 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:46:33,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-15 23:46:33,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-15 23:46:33,832 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 17 states. [2019-11-15 23:46:33,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:46:33,987 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-15 23:46:33,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-15 23:46:33,987 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2019-11-15 23:46:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:46:33,988 INFO L225 Difference]: With dead ends: 42 [2019-11-15 23:46:33,988 INFO L226 Difference]: Without dead ends: 38 [2019-11-15 23:46:33,989 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2019-11-15 23:46:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-15 23:46:33,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-15 23:46:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-15 23:46:33,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-15 23:46:33,995 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-15 23:46:33,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:46:33,999 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-15 23:46:33,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-15 23:46:33,999 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-15 23:46:34,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-15 23:46:34,004 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:34,004 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:34,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:34,205 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:34,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:34,205 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-15 23:46:34,205 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:34,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104948479] [2019-11-15 23:46:34,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:34,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:34,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-15 23:46:34,490 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104948479] [2019-11-15 23:46:34,490 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767950095] [2019-11-15 23:46:34,490 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/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 [2019-11-15 23:46:34,540 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-15 23:46:34,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:46:34,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-15 23:46:34,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:46:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-15 23:46:35,063 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:46:35,063 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 37 [2019-11-15 23:46:35,063 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749945449] [2019-11-15 23:46:35,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-15 23:46:35,065 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:46:35,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-15 23:46:35,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2019-11-15 23:46:35,066 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 37 states. [2019-11-15 23:46:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:46:35,672 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-15 23:46:35,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-15 23:46:35,673 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 63 [2019-11-15 23:46:35,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:46:35,674 INFO L225 Difference]: With dead ends: 45 [2019-11-15 23:46:35,674 INFO L226 Difference]: Without dead ends: 41 [2019-11-15 23:46:35,675 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2019-11-15 23:46:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-15 23:46:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-15 23:46:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-15 23:46:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-15 23:46:35,681 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-15 23:46:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:46:35,682 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-15 23:46:35,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-15 23:46:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-15 23:46:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-15 23:46:35,683 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:35,683 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:35,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:35,887 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:35,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:35,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-15 23:46:35,887 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:35,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84146605] [2019-11-15 23:46:35,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:35,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:35,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-15 23:46:36,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84146605] [2019-11-15 23:46:36,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347203703] [2019-11-15 23:46:36,216 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/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 [2019-11-15 23:46:36,278 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 23:46:36,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:46:36,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-15 23:46:36,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:46:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-15 23:46:36,370 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:46:36,371 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 19 [2019-11-15 23:46:36,371 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63701775] [2019-11-15 23:46:36,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-15 23:46:36,372 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:46:36,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-15 23:46:36,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-11-15 23:46:36,373 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 19 states. [2019-11-15 23:46:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:46:36,532 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-15 23:46:36,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-15 23:46:36,533 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2019-11-15 23:46:36,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:46:36,534 INFO L225 Difference]: With dead ends: 48 [2019-11-15 23:46:36,534 INFO L226 Difference]: Without dead ends: 44 [2019-11-15 23:46:36,535 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2019-11-15 23:46:36,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-15 23:46:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-15 23:46:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-15 23:46:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-15 23:46:36,544 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-15 23:46:36,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:46:36,545 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-15 23:46:36,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-15 23:46:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-15 23:46:36,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-15 23:46:36,546 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:36,546 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:36,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:36,755 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:36,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:36,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-15 23:46:36,756 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:36,756 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498045568] [2019-11-15 23:46:36,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:36,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:36,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-15 23:46:37,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498045568] [2019-11-15 23:46:37,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139637480] [2019-11-15 23:46:37,100 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/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 [2019-11-15 23:46:37,172 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-15 23:46:37,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:46:37,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-15 23:46:37,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:46:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-15 23:46:37,251 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:46:37,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 20 [2019-11-15 23:46:37,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295275899] [2019-11-15 23:46:37,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-15 23:46:37,252 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:46:37,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-15 23:46:37,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-11-15 23:46:37,253 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2019-11-15 23:46:37,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:46:37,454 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-11-15 23:46:37,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-15 23:46:37,455 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2019-11-15 23:46:37,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:46:37,456 INFO L225 Difference]: With dead ends: 51 [2019-11-15 23:46:37,456 INFO L226 Difference]: Without dead ends: 47 [2019-11-15 23:46:37,457 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2019-11-15 23:46:37,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-15 23:46:37,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-15 23:46:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-15 23:46:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-15 23:46:37,463 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-11-15 23:46:37,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:46:37,465 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-15 23:46:37,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-15 23:46:37,465 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-15 23:46:37,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-15 23:46:37,468 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:37,468 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:37,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:37,672 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:37,672 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-11-15 23:46:37,673 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:37,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233038638] [2019-11-15 23:46:37,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:37,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:37,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-15 23:46:38,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233038638] [2019-11-15 23:46:38,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972892297] [2019-11-15 23:46:38,134 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/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 [2019-11-15 23:46:38,207 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-15 23:46:38,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:46:38,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-15 23:46:38,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:46:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-15 23:46:38,283 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:46:38,283 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 21 [2019-11-15 23:46:38,283 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342007097] [2019-11-15 23:46:38,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-15 23:46:38,284 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:46:38,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-15 23:46:38,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-11-15 23:46:38,285 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 21 states. [2019-11-15 23:46:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:46:38,497 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-15 23:46:38,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-15 23:46:38,498 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2019-11-15 23:46:38,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:46:38,499 INFO L225 Difference]: With dead ends: 54 [2019-11-15 23:46:38,499 INFO L226 Difference]: Without dead ends: 50 [2019-11-15 23:46:38,500 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2019-11-15 23:46:38,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-15 23:46:38,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-15 23:46:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-15 23:46:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-15 23:46:38,506 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-11-15 23:46:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:46:38,506 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-15 23:46:38,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-15 23:46:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-15 23:46:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-15 23:46:38,508 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:38,508 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:38,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:38,712 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:38,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:38,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-11-15 23:46:38,713 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:38,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096690938] [2019-11-15 23:46:38,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:38,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:38,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-15 23:46:39,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096690938] [2019-11-15 23:46:39,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514787022] [2019-11-15 23:46:39,225 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/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 [2019-11-15 23:46:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:39,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-15 23:46:39,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:46:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-15 23:46:39,374 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:46:39,374 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 22 [2019-11-15 23:46:39,375 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065328634] [2019-11-15 23:46:39,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-15 23:46:39,376 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:46:39,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-15 23:46:39,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2019-11-15 23:46:39,377 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 22 states. [2019-11-15 23:46:39,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:46:39,610 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-15 23:46:39,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-15 23:46:39,611 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2019-11-15 23:46:39,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:46:39,612 INFO L225 Difference]: With dead ends: 57 [2019-11-15 23:46:39,612 INFO L226 Difference]: Without dead ends: 53 [2019-11-15 23:46:39,613 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=400, Invalid=860, Unknown=0, NotChecked=0, Total=1260 [2019-11-15 23:46:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-15 23:46:39,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-15 23:46:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-15 23:46:39,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-15 23:46:39,623 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-11-15 23:46:39,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:46:39,624 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-15 23:46:39,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-15 23:46:39,624 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-15 23:46:39,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-15 23:46:39,626 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:39,627 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:39,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:39,830 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:39,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:39,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-11-15 23:46:39,831 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:39,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963841458] [2019-11-15 23:46:39,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:39,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:39,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:46:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-15 23:46:40,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963841458] [2019-11-15 23:46:40,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708295294] [2019-11-15 23:46:40,311 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/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 [2019-11-15 23:46:40,376 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:46:40,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:46:40,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-15 23:46:40,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:46:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-15 23:46:40,447 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:46:40,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 23 [2019-11-15 23:46:40,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724315278] [2019-11-15 23:46:40,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-15 23:46:40,448 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:46:40,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-15 23:46:40,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-11-15 23:46:40,449 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 23 states. [2019-11-15 23:46:40,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:46:40,704 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-15 23:46:40,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-15 23:46:40,705 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 93 [2019-11-15 23:46:40,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:46:40,706 INFO L225 Difference]: With dead ends: 60 [2019-11-15 23:46:40,706 INFO L226 Difference]: Without dead ends: 56 [2019-11-15 23:46:40,706 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=450, Invalid=956, Unknown=0, NotChecked=0, Total=1406 [2019-11-15 23:46:40,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-15 23:46:40,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-15 23:46:40,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-15 23:46:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-15 23:46:40,712 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-11-15 23:46:40,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:46:40,712 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-15 23:46:40,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-15 23:46:40,712 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-15 23:46:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-15 23:46:40,713 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:46:40,713 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:46:40,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:46:40,916 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:46:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:46:40,916 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-11-15 23:46:40,917 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:46:40,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533364054] [2019-11-15 23:46:40,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:40,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:46:40,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:46:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:46:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:46:40,977 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:46:40,983 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 23:46:41,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 11:46:41 BoogieIcfgContainer [2019-11-15 23:46:41,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 23:46:41,033 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 23:46:41,033 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 23:46:41,033 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 23:46:41,034 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:46:27" (3/4) ... [2019-11-15 23:46:41,036 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 23:46:41,113 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9d77a7c5-3e08-4cee-84db-1002de13ef2c/bin/uautomizer/witness.graphml [2019-11-15 23:46:41,113 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 23:46:41,115 INFO L168 Benchmark]: Toolchain (without parser) took 13882.70 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 222.3 MB). Free memory was 944.7 MB in the beginning and 867.1 MB in the end (delta: 77.6 MB). Peak memory consumption was 299.9 MB. Max. memory is 11.5 GB. [2019-11-15 23:46:41,116 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:46:41,116 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -195.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-15 23:46:41,116 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.45 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:46:41,117 INFO L168 Benchmark]: Boogie Preprocessor took 18.10 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:46:41,117 INFO L168 Benchmark]: RCFGBuilder took 222.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-15 23:46:41,117 INFO L168 Benchmark]: TraceAbstraction took 13195.51 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 76.5 MB). Free memory was 1.1 GB in the beginning and 869.5 MB in the end (delta: 252.7 MB). Peak memory consumption was 329.2 MB. Max. memory is 11.5 GB. [2019-11-15 23:46:41,118 INFO L168 Benchmark]: Witness Printer took 80.03 ms. Allocated memory is still 1.3 GB. Free memory was 869.5 MB in the beginning and 867.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 11.5 GB. [2019-11-15 23:46:41,120 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 326.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -195.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.45 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.10 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 222.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 13195.51 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 76.5 MB). Free memory was 1.1 GB in the beginning and 869.5 MB in the end (delta: 252.7 MB). Peak memory consumption was 329.2 MB. Max. memory is 11.5 GB. * Witness Printer took 80.03 ms. Allocated memory is still 1.3 GB. Free memory was 869.5 MB in the beginning and 867.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 15; [L11] CALL, EXPR id(input) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 15 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 13.1s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 136 SDtfs, 394 SDslu, 858 SDs, 0 SdLazy, 883 SolverSat, 100 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1297 GetRequests, 922 SyntacticMatches, 0 SemanticMatches, 375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1868 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 1620 NumberOfCodeBlocks, 1620 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 1492 ConstructedInterpolants, 0 QuantifiedInterpolants, 246272 SizeOfPredicates, 116 NumberOfNonLiveVariables, 1806 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 29 InterpolantComputations, 1 PerfectInterpolantSequences, 3150/6300 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 incorrect! Received shutdown request...