./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/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 a544811fe2a74801350302afc46fb67e1c6f238a .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-12-07 16:48:26,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:48:26,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:48:26,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:48:26,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:48:26,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:48:26,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:48:26,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:48:26,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:48:26,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:48:26,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:48:26,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:48:26,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:48:26,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:48:26,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:48:26,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:48:26,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:48:26,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:48:26,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:48:26,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:48:26,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:48:26,059 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:48:26,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:48:26,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:48:26,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:48:26,062 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:48:26,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:48:26,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:48:26,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:48:26,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:48:26,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:48:26,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:48:26,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:48:26,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:48:26,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:48:26,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:48:26,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:48:26,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:48:26,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:48:26,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:48:26,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:48:26,070 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 16:48:26,082 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:48:26,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:48:26,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 16:48:26,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 16:48:26,083 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 16:48:26,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:48:26,084 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 16:48:26,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:48:26,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 16:48:26,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:48:26,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 16:48:26,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 16:48:26,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 16:48:26,085 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 16:48:26,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 16:48:26,086 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:48:26,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 16:48:26,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:48:26,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 16:48:26,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 16:48:26,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 16:48:26,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:48:26,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:48:26,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 16:48:26,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 16:48:26,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 16:48:26,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 16:48:26,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 16:48:26,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:48:26,088 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_e3715c44-7d67-4961-90f2-4b7cbe544b8a/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 -> a544811fe2a74801350302afc46fb67e1c6f238a [2019-12-07 16:48:26,186 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:48:26,194 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:48:26,197 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:48:26,198 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:48:26,198 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:48:26,199 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c [2019-12-07 16:48:26,236 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/data/73a4e1c85/be6c5208197e400cb97b41698d5429bf/FLAG47db6d2b6 [2019-12-07 16:48:26,558 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:48:26,558 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/sv-benchmarks/c/recursive-simple/id_i25_o25-2.c [2019-12-07 16:48:26,562 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/data/73a4e1c85/be6c5208197e400cb97b41698d5429bf/FLAG47db6d2b6 [2019-12-07 16:48:26,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/data/73a4e1c85/be6c5208197e400cb97b41698d5429bf [2019-12-07 16:48:26,573 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:48:26,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 16:48:26,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:48:26,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:48:26,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:48:26,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:48:26" (1/1) ... [2019-12-07 16:48:26,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f7b7378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:48:26, skipping insertion in model container [2019-12-07 16:48:26,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:48:26" (1/1) ... [2019-12-07 16:48:26,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:48:26,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:48:26,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:48:26,700 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:48:26,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:48:26,752 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:48:26,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:48:26 WrapperNode [2019-12-07 16:48:26,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:48:26,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 16:48:26,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 16:48:26,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 16:48:26,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:48:26" (1/1) ... [2019-12-07 16:48:26,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:48:26" (1/1) ... [2019-12-07 16:48:26,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 16:48:26,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:48:26,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:48:26,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:48:26,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:48:26" (1/1) ... [2019-12-07 16:48:26,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:48:26" (1/1) ... [2019-12-07 16:48:26,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:48:26" (1/1) ... [2019-12-07 16:48:26,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:48:26" (1/1) ... [2019-12-07 16:48:26,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:48:26" (1/1) ... [2019-12-07 16:48:26,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:48:26" (1/1) ... [2019-12-07 16:48:26,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:48:26" (1/1) ... [2019-12-07 16:48:26,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:48:26,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:48:26,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:48:26,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:48:26,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:48:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:48:26,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:48:26,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:48:26,823 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-12-07 16:48:26,823 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-12-07 16:48:26,912 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:48:26,912 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 16:48:26,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:48:26 BoogieIcfgContainer [2019-12-07 16:48:26,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:48:26,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 16:48:26,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 16:48:26,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 16:48:26,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 04:48:26" (1/3) ... [2019-12-07 16:48:26,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748b72b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:48:26, skipping insertion in model container [2019-12-07 16:48:26,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:48:26" (2/3) ... [2019-12-07 16:48:26,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748b72b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:48:26, skipping insertion in model container [2019-12-07 16:48:26,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:48:26" (3/3) ... [2019-12-07 16:48:26,917 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2019-12-07 16:48:26,924 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 16:48:26,927 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 16:48:26,935 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 16:48:26,949 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 16:48:26,949 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 16:48:26,949 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 16:48:26,949 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:48:26,949 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:48:26,949 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 16:48:26,949 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:48:26,950 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 16:48:26,960 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-12-07 16:48:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 16:48:26,963 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:26,964 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:26,964 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:26,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:26,968 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-12-07 16:48:26,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:26,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939242437] [2019-12-07 16:48:26,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:48:27,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939242437] [2019-12-07 16:48:27,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:48:27,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 16:48:27,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974612619] [2019-12-07 16:48:27,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 16:48:27,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:27,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 16:48:27,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-07 16:48:27,120 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-12-07 16:48:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:27,183 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-12-07 16:48:27,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 16:48:27,185 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-12-07 16:48:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:27,191 INFO L225 Difference]: With dead ends: 24 [2019-12-07 16:48:27,191 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 16:48:27,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 16:48:27,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 16:48:27,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-12-07 16:48:27,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 16:48:27,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-12-07 16:48:27,218 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-12-07 16:48:27,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:27,218 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-12-07 16:48:27,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 16:48:27,219 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-12-07 16:48:27,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 16:48:27,219 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:27,220 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:27,220 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:27,220 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-12-07 16:48:27,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:27,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488001410] [2019-12-07 16:48:27,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 16:48:27,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488001410] [2019-12-07 16:48:27,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044826972] [2019-12-07 16:48:27,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:27,316 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:48:27,320 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 16:48:27,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:27,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2019-12-07 16:48:27,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325359702] [2019-12-07 16:48:27,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 16:48:27,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:27,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 16:48:27,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-12-07 16:48:27,366 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 10 states. [2019-12-07 16:48:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:27,414 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-12-07 16:48:27,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:48:27,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-07 16:48:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:27,415 INFO L225 Difference]: With dead ends: 21 [2019-12-07 16:48:27,415 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 16:48:27,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-07 16:48:27,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 16:48:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 16:48:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 16:48:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-12-07 16:48:27,419 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-12-07 16:48:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:27,420 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-12-07 16:48:27,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 16:48:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-12-07 16:48:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 16:48:27,420 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:27,420 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:27,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:27,621 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:27,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:27,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-12-07 16:48:27,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:27,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586792595] [2019-12-07 16:48:27,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 16:48:27,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586792595] [2019-12-07 16:48:27,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606088088] [2019-12-07 16:48:27,779 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:27,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 16:48:27,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:27,803 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 16:48:27,805 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 16:48:27,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:27,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2019-12-07 16:48:27,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710158533] [2019-12-07 16:48:27,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 16:48:27,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:27,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 16:48:27,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-12-07 16:48:27,835 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2019-12-07 16:48:27,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:27,880 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-12-07 16:48:27,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 16:48:27,881 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-12-07 16:48:27,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:27,881 INFO L225 Difference]: With dead ends: 24 [2019-12-07 16:48:27,882 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 16:48:27,882 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-07 16:48:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 16:48:27,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 16:48:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 16:48:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-12-07 16:48:27,886 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-12-07 16:48:27,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:27,886 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-12-07 16:48:27,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 16:48:27,886 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-12-07 16:48:27,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 16:48:27,887 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:27,887 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:28,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:28,087 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:28,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:28,088 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-12-07 16:48:28,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:28,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620553332] [2019-12-07 16:48:28,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 16:48:28,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620553332] [2019-12-07 16:48:28,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242192949] [2019-12-07 16:48:28,186 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:28,204 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 16:48:28,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:28,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 16:48:28,207 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 16:48:28,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:28,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2019-12-07 16:48:28,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844904461] [2019-12-07 16:48:28,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 16:48:28,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:28,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 16:48:28,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-07 16:48:28,235 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 12 states. [2019-12-07 16:48:28,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:28,284 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-12-07 16:48:28,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 16:48:28,284 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-12-07 16:48:28,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:28,285 INFO L225 Difference]: With dead ends: 27 [2019-12-07 16:48:28,285 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 16:48:28,286 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-07 16:48:28,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 16:48:28,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-12-07 16:48:28,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 16:48:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-12-07 16:48:28,290 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-12-07 16:48:28,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:28,290 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-12-07 16:48:28,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 16:48:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-12-07 16:48:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-07 16:48:28,291 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:28,291 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:28,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:28,492 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:28,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-12-07 16:48:28,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:28,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29481013] [2019-12-07 16:48:28,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 16:48:28,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29481013] [2019-12-07 16:48:28,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489081018] [2019-12-07 16:48:28,636 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:28,656 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 16:48:28,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:28,657 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 16:48:28,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 16:48:28,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:28,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2019-12-07 16:48:28,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560745700] [2019-12-07 16:48:28,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 16:48:28,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:28,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 16:48:28,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-12-07 16:48:28,687 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 13 states. [2019-12-07 16:48:28,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:28,748 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-12-07 16:48:28,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 16:48:28,748 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-12-07 16:48:28,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:28,749 INFO L225 Difference]: With dead ends: 30 [2019-12-07 16:48:28,749 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 16:48:28,750 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-07 16:48:28,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 16:48:28,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 16:48:28,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 16:48:28,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-12-07 16:48:28,754 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-12-07 16:48:28,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:28,754 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-12-07 16:48:28,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 16:48:28,755 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-12-07 16:48:28,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 16:48:28,756 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:28,756 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:28,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:28,957 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:28,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:28,957 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-12-07 16:48:28,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:28,958 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909519749] [2019-12-07 16:48:28,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 16:48:29,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909519749] [2019-12-07 16:48:29,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881249433] [2019-12-07 16:48:29,152 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:29,174 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 16:48:29,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:29,175 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 16:48:29,177 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 16:48:29,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:29,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2019-12-07 16:48:29,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010049410] [2019-12-07 16:48:29,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 16:48:29,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:29,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 16:48:29,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-07 16:48:29,205 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 14 states. [2019-12-07 16:48:29,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:29,261 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-12-07 16:48:29,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 16:48:29,262 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2019-12-07 16:48:29,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:29,262 INFO L225 Difference]: With dead ends: 33 [2019-12-07 16:48:29,262 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 16:48:29,263 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2019-12-07 16:48:29,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 16:48:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-12-07 16:48:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 16:48:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-12-07 16:48:29,267 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-12-07 16:48:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:29,267 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-12-07 16:48:29,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 16:48:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-12-07 16:48:29,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 16:48:29,268 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:29,268 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:29,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:29,470 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:29,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:29,471 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-12-07 16:48:29,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:29,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671810645] [2019-12-07 16:48:29,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-12-07 16:48:29,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671810645] [2019-12-07 16:48:29,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261293446] [2019-12-07 16:48:29,710 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:29,739 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-07 16:48:29,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:29,740 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 16:48:29,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-12-07 16:48:29,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:29,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2019-12-07 16:48:29,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64431674] [2019-12-07 16:48:29,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-07 16:48:29,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:29,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-07 16:48:29,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2019-12-07 16:48:29,921 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 28 states. [2019-12-07 16:48:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:30,128 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-12-07 16:48:30,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 16:48:30,128 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 45 [2019-12-07 16:48:30,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:30,129 INFO L225 Difference]: With dead ends: 36 [2019-12-07 16:48:30,129 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 16:48:30,130 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 16:48:30,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 16:48:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-07 16:48:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 16:48:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-12-07 16:48:30,134 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-12-07 16:48:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:30,134 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-12-07 16:48:30,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-07 16:48:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-12-07 16:48:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-07 16:48:30,135 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:30,135 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:30,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:30,336 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:30,337 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-12-07 16:48:30,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:30,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225010884] [2019-12-07 16:48:30,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 16:48:30,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225010884] [2019-12-07 16:48:30,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614802496] [2019-12-07 16:48:30,559 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:30,584 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 16:48:30,587 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 16:48:30,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:30,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2019-12-07 16:48:30,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005625714] [2019-12-07 16:48:30,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 16:48:30,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:30,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 16:48:30,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-12-07 16:48:30,621 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2019-12-07 16:48:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:30,701 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-12-07 16:48:30,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 16:48:30,701 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2019-12-07 16:48:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:30,702 INFO L225 Difference]: With dead ends: 39 [2019-12-07 16:48:30,702 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 16:48:30,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2019-12-07 16:48:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 16:48:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-12-07 16:48:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 16:48:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-12-07 16:48:30,706 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-12-07 16:48:30,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:30,707 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-12-07 16:48:30,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 16:48:30,707 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-12-07 16:48:30,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-12-07 16:48:30,708 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:30,708 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:30,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:30,909 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:30,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:30,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-12-07 16:48:30,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:30,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134867429] [2019-12-07 16:48:30,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-12-07 16:48:31,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134867429] [2019-12-07 16:48:31,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194669696] [2019-12-07 16:48:31,075 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:31,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 16:48:31,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:31,102 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 16:48:31,104 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-12-07 16:48:31,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:31,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2019-12-07 16:48:31,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756179583] [2019-12-07 16:48:31,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 16:48:31,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:31,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 16:48:31,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-12-07 16:48:31,139 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 17 states. [2019-12-07 16:48:31,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:31,222 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-12-07 16:48:31,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 16:48:31,222 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2019-12-07 16:48:31,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:31,223 INFO L225 Difference]: With dead ends: 42 [2019-12-07 16:48:31,223 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 16:48:31,224 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2019-12-07 16:48:31,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 16:48:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-07 16:48:31,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 16:48:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-12-07 16:48:31,228 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-12-07 16:48:31,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:31,228 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-12-07 16:48:31,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 16:48:31,228 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-12-07 16:48:31,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-12-07 16:48:31,229 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:31,229 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:31,429 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:31,430 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:31,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:31,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-12-07 16:48:31,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:31,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347553874] [2019-12-07 16:48:31,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 16:48:31,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347553874] [2019-12-07 16:48:31,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448092135] [2019-12-07 16:48:31,635 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:31,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-07 16:48:31,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:31,666 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 16:48:31,669 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 16:48:31,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:31,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 37 [2019-12-07 16:48:31,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058308885] [2019-12-07 16:48:31,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-07 16:48:31,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:31,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-07 16:48:31,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 16:48:31,970 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 37 states. [2019-12-07 16:48:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:32,269 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-12-07 16:48:32,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-07 16:48:32,269 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 63 [2019-12-07 16:48:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:32,270 INFO L225 Difference]: With dead ends: 45 [2019-12-07 16:48:32,270 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 16:48:32,271 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 16:48:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 16:48:32,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-12-07 16:48:32,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 16:48:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-12-07 16:48:32,275 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-12-07 16:48:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:32,275 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-12-07 16:48:32,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-07 16:48:32,275 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-12-07 16:48:32,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-12-07 16:48:32,276 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:32,276 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:32,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:32,477 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:32,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:32,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-12-07 16:48:32,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:32,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272976599] [2019-12-07 16:48:32,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-12-07 16:48:32,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272976599] [2019-12-07 16:48:32,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418364858] [2019-12-07 16:48:32,710 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:32,734 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 16:48:32,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:32,735 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 16:48:32,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-12-07 16:48:32,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:32,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 19 [2019-12-07 16:48:32,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362792771] [2019-12-07 16:48:32,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 16:48:32,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:32,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 16:48:32,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-07 16:48:32,772 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 19 states. [2019-12-07 16:48:32,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:32,862 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-12-07 16:48:32,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 16:48:32,863 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2019-12-07 16:48:32,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:32,863 INFO L225 Difference]: With dead ends: 48 [2019-12-07 16:48:32,863 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 16:48:32,864 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2019-12-07 16:48:32,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 16:48:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-07 16:48:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 16:48:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-12-07 16:48:32,868 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-12-07 16:48:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:32,868 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-12-07 16:48:32,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 16:48:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-12-07 16:48:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-12-07 16:48:32,869 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:32,869 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:33,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:33,070 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:33,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:33,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-12-07 16:48:33,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:33,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966689811] [2019-12-07 16:48:33,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-12-07 16:48:33,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966689811] [2019-12-07 16:48:33,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141837694] [2019-12-07 16:48:33,378 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:33,414 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-12-07 16:48:33,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:33,415 INFO L264 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 16:48:33,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-12-07 16:48:33,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:33,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 20 [2019-12-07 16:48:33,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229393331] [2019-12-07 16:48:33,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 16:48:33,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:33,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 16:48:33,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-12-07 16:48:33,453 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2019-12-07 16:48:33,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:33,554 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-12-07 16:48:33,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 16:48:33,555 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2019-12-07 16:48:33,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:33,555 INFO L225 Difference]: With dead ends: 51 [2019-12-07 16:48:33,555 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 16:48:33,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2019-12-07 16:48:33,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 16:48:33,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-12-07 16:48:33,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 16:48:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-12-07 16:48:33,561 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-12-07 16:48:33,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:33,562 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-12-07 16:48:33,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 16:48:33,562 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-12-07 16:48:33,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-12-07 16:48:33,563 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:33,563 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:33,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:33,764 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:33,765 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-12-07 16:48:33,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:33,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642256404] [2019-12-07 16:48:33,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-12-07 16:48:34,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642256404] [2019-12-07 16:48:34,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888558604] [2019-12-07 16:48:34,061 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:34,099 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-07 16:48:34,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:34,100 INFO L264 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 16:48:34,101 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-12-07 16:48:34,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:34,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 21 [2019-12-07 16:48:34,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568376717] [2019-12-07 16:48:34,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 16:48:34,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:34,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 16:48:34,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-07 16:48:34,142 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 21 states. [2019-12-07 16:48:34,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:34,266 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-12-07 16:48:34,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 16:48:34,266 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2019-12-07 16:48:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:34,267 INFO L225 Difference]: With dead ends: 54 [2019-12-07 16:48:34,267 INFO L226 Difference]: Without dead ends: 50 [2019-12-07 16:48:34,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 16:48:34,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-07 16:48:34,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-07 16:48:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 16:48:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-12-07 16:48:34,271 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-12-07 16:48:34,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:34,271 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-12-07 16:48:34,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 16:48:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-12-07 16:48:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-12-07 16:48:34,272 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:34,272 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:34,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:34,474 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:34,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:34,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-12-07 16:48:34,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:34,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153522309] [2019-12-07 16:48:34,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-12-07 16:48:34,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153522309] [2019-12-07 16:48:34,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691369416] [2019-12-07 16:48:34,820 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:34,851 INFO L264 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 16:48:34,853 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-12-07 16:48:34,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:34,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 22 [2019-12-07 16:48:34,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651325679] [2019-12-07 16:48:34,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 16:48:34,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:34,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 16:48:34,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2019-12-07 16:48:34,903 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 22 states. [2019-12-07 16:48:35,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:35,022 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-12-07 16:48:35,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 16:48:35,022 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2019-12-07 16:48:35,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:35,023 INFO L225 Difference]: With dead ends: 57 [2019-12-07 16:48:35,023 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 16:48:35,024 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=400, Invalid=860, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 16:48:35,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 16:48:35,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-07 16:48:35,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 16:48:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-12-07 16:48:35,027 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-12-07 16:48:35,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:35,028 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-12-07 16:48:35,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 16:48:35,028 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-12-07 16:48:35,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-12-07 16:48:35,028 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:35,028 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:35,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:35,229 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:35,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:35,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-12-07 16:48:35,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:35,230 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778763267] [2019-12-07 16:48:35,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-12-07 16:48:35,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778763267] [2019-12-07 16:48:35,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247216034] [2019-12-07 16:48:35,618 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:35,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 16:48:35,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:35,654 INFO L264 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 16:48:35,655 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-12-07 16:48:35,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:35,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 23 [2019-12-07 16:48:35,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131713727] [2019-12-07 16:48:35,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 16:48:35,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:35,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 16:48:35,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-12-07 16:48:35,694 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 23 states. [2019-12-07 16:48:35,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:35,823 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-12-07 16:48:35,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 16:48:35,823 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 93 [2019-12-07 16:48:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:35,824 INFO L225 Difference]: With dead ends: 60 [2019-12-07 16:48:35,824 INFO L226 Difference]: Without dead ends: 56 [2019-12-07 16:48:35,824 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=450, Invalid=956, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 16:48:35,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-07 16:48:35,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-07 16:48:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-07 16:48:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-12-07 16:48:35,829 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-12-07 16:48:35,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:35,830 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-12-07 16:48:35,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 16:48:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-12-07 16:48:35,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-12-07 16:48:35,831 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:35,831 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:36,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:36,032 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:36,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:36,032 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-12-07 16:48:36,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:36,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655290963] [2019-12-07 16:48:36,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-12-07 16:48:36,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655290963] [2019-12-07 16:48:36,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478863216] [2019-12-07 16:48:36,416 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:36,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-12-07 16:48:36,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:36,451 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-07 16:48:36,452 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-12-07 16:48:36,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:36,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2019-12-07 16:48:36,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98280871] [2019-12-07 16:48:36,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 16:48:36,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:36,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 16:48:36,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2019-12-07 16:48:36,495 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 24 states. [2019-12-07 16:48:36,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:36,638 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-12-07 16:48:36,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 16:48:36,638 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2019-12-07 16:48:36,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:36,639 INFO L225 Difference]: With dead ends: 63 [2019-12-07 16:48:36,639 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 16:48:36,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=503, Invalid=1057, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 16:48:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 16:48:36,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-12-07 16:48:36,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-07 16:48:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-12-07 16:48:36,643 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-12-07 16:48:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:36,643 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-12-07 16:48:36,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 16:48:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-12-07 16:48:36,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-12-07 16:48:36,644 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:36,644 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:36,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:36,845 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:36,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:36,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-12-07 16:48:36,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:36,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97537814] [2019-12-07 16:48:36,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-12-07 16:48:37,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97537814] [2019-12-07 16:48:37,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340246848] [2019-12-07 16:48:37,227 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:37,255 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 16:48:37,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:37,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-07 16:48:37,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-12-07 16:48:37,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:37,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2019-12-07 16:48:37,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429946382] [2019-12-07 16:48:37,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 16:48:37,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:37,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 16:48:37,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2019-12-07 16:48:37,303 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 25 states. [2019-12-07 16:48:37,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:37,441 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-12-07 16:48:37,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 16:48:37,442 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 105 [2019-12-07 16:48:37,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:37,442 INFO L225 Difference]: With dead ends: 66 [2019-12-07 16:48:37,442 INFO L226 Difference]: Without dead ends: 62 [2019-12-07 16:48:37,443 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=559, Invalid=1163, Unknown=0, NotChecked=0, Total=1722 [2019-12-07 16:48:37,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-07 16:48:37,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-12-07 16:48:37,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-07 16:48:37,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-12-07 16:48:37,446 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-12-07 16:48:37,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:37,447 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-12-07 16:48:37,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 16:48:37,447 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-12-07 16:48:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-12-07 16:48:37,447 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:37,447 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:37,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:37,648 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:37,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:37,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-12-07 16:48:37,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:37,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022830140] [2019-12-07 16:48:37,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-12-07 16:48:38,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022830140] [2019-12-07 16:48:38,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559527525] [2019-12-07 16:48:38,039 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:38,077 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-12-07 16:48:38,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:38,078 INFO L264 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-07 16:48:38,079 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-12-07 16:48:38,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:38,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 26 [2019-12-07 16:48:38,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873442383] [2019-12-07 16:48:38,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 16:48:38,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:38,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 16:48:38,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2019-12-07 16:48:38,125 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 26 states. [2019-12-07 16:48:38,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:38,279 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-12-07 16:48:38,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 16:48:38,279 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 111 [2019-12-07 16:48:38,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:38,280 INFO L225 Difference]: With dead ends: 69 [2019-12-07 16:48:38,280 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 16:48:38,281 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2019-12-07 16:48:38,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 16:48:38,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-12-07 16:48:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-12-07 16:48:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-12-07 16:48:38,283 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-12-07 16:48:38,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:38,284 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-12-07 16:48:38,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 16:48:38,284 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-12-07 16:48:38,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-12-07 16:48:38,284 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:38,285 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:38,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:38,485 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:38,486 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-12-07 16:48:38,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:38,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576603459] [2019-12-07 16:48:38,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-12-07 16:48:38,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576603459] [2019-12-07 16:48:38,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406113958] [2019-12-07 16:48:38,962 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:39,000 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-12-07 16:48:39,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:39,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-07 16:48:39,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-12-07 16:48:39,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:39,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 27 [2019-12-07 16:48:39,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849297692] [2019-12-07 16:48:39,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-07 16:48:39,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:39,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-07 16:48:39,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2019-12-07 16:48:39,056 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 27 states. [2019-12-07 16:48:39,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:39,226 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-12-07 16:48:39,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-07 16:48:39,226 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 117 [2019-12-07 16:48:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:39,227 INFO L225 Difference]: With dead ends: 72 [2019-12-07 16:48:39,227 INFO L226 Difference]: Without dead ends: 68 [2019-12-07 16:48:39,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=680, Invalid=1390, Unknown=0, NotChecked=0, Total=2070 [2019-12-07 16:48:39,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-07 16:48:39,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-12-07 16:48:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-07 16:48:39,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-12-07 16:48:39,230 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-12-07 16:48:39,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:39,230 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-12-07 16:48:39,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-07 16:48:39,231 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-12-07 16:48:39,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-12-07 16:48:39,231 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:39,231 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:39,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:39,432 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:39,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:39,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-12-07 16:48:39,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:39,433 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709776384] [2019-12-07 16:48:39,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-12-07 16:48:39,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709776384] [2019-12-07 16:48:39,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122480926] [2019-12-07 16:48:39,902 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:39,937 INFO L264 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-07 16:48:39,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-12-07 16:48:39,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:39,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 28 [2019-12-07 16:48:39,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229144991] [2019-12-07 16:48:39,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-07 16:48:39,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:39,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-07 16:48:39,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2019-12-07 16:48:39,997 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 28 states. [2019-12-07 16:48:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:40,177 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-12-07 16:48:40,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 16:48:40,177 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 123 [2019-12-07 16:48:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:40,178 INFO L225 Difference]: With dead ends: 75 [2019-12-07 16:48:40,178 INFO L226 Difference]: Without dead ends: 71 [2019-12-07 16:48:40,179 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2019-12-07 16:48:40,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-07 16:48:40,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-12-07 16:48:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-07 16:48:40,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-12-07 16:48:40,182 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-12-07 16:48:40,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:40,182 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-12-07 16:48:40,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-07 16:48:40,182 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-12-07 16:48:40,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-12-07 16:48:40,182 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:40,183 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:40,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:40,383 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:40,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:40,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-12-07 16:48:40,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:40,385 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470889840] [2019-12-07 16:48:40,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-12-07 16:48:40,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470889840] [2019-12-07 16:48:40,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578823460] [2019-12-07 16:48:40,915 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:40,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 16:48:40,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:40,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 16:48:40,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-12-07 16:48:41,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:41,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 29 [2019-12-07 16:48:41,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467065247] [2019-12-07 16:48:41,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 16:48:41,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:41,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 16:48:41,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2019-12-07 16:48:41,008 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 29 states. [2019-12-07 16:48:41,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:41,197 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2019-12-07 16:48:41,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-07 16:48:41,197 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2019-12-07 16:48:41,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:41,198 INFO L225 Difference]: With dead ends: 78 [2019-12-07 16:48:41,198 INFO L226 Difference]: Without dead ends: 74 [2019-12-07 16:48:41,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=813, Invalid=1637, Unknown=0, NotChecked=0, Total=2450 [2019-12-07 16:48:41,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-07 16:48:41,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-12-07 16:48:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-07 16:48:41,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2019-12-07 16:48:41,202 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 129 [2019-12-07 16:48:41,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:41,202 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2019-12-07 16:48:41,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 16:48:41,202 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2019-12-07 16:48:41,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-12-07 16:48:41,203 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:41,203 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:41,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:41,404 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:41,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1463802477, now seen corresponding path program 21 times [2019-12-07 16:48:41,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:41,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133314498] [2019-12-07 16:48:41,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-12-07 16:48:41,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133314498] [2019-12-07 16:48:41,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236560419] [2019-12-07 16:48:41,944 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:41,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-12-07 16:48:41,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:41,990 INFO L264 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 46 conjunts are in the unsatisfiable core [2019-12-07 16:48:41,992 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-12-07 16:48:42,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:42,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 30 [2019-12-07 16:48:42,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052087176] [2019-12-07 16:48:42,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-07 16:48:42,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:42,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-07 16:48:42,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2019-12-07 16:48:42,043 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 30 states. [2019-12-07 16:48:42,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:42,231 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2019-12-07 16:48:42,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-07 16:48:42,231 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 135 [2019-12-07 16:48:42,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:42,232 INFO L225 Difference]: With dead ends: 81 [2019-12-07 16:48:42,232 INFO L226 Difference]: Without dead ends: 77 [2019-12-07 16:48:42,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=884, Invalid=1768, Unknown=0, NotChecked=0, Total=2652 [2019-12-07 16:48:42,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-07 16:48:42,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-12-07 16:48:42,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-07 16:48:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2019-12-07 16:48:42,236 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 135 [2019-12-07 16:48:42,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:42,236 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2019-12-07 16:48:42,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-07 16:48:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2019-12-07 16:48:42,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-12-07 16:48:42,237 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:42,237 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:42,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:42,438 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:42,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:42,438 INFO L82 PathProgramCache]: Analyzing trace with hash -555819607, now seen corresponding path program 22 times [2019-12-07 16:48:42,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:42,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048373721] [2019-12-07 16:48:42,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-12-07 16:48:43,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048373721] [2019-12-07 16:48:43,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93195759] [2019-12-07 16:48:43,040 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:43,075 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 16:48:43,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:43,076 INFO L264 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 48 conjunts are in the unsatisfiable core [2019-12-07 16:48:43,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-12-07 16:48:43,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:43,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 31 [2019-12-07 16:48:43,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803239683] [2019-12-07 16:48:43,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-07 16:48:43,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:43,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-07 16:48:43,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=594, Unknown=0, NotChecked=0, Total=930 [2019-12-07 16:48:43,137 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 31 states. [2019-12-07 16:48:43,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:43,346 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2019-12-07 16:48:43,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-07 16:48:43,347 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 141 [2019-12-07 16:48:43,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:43,347 INFO L225 Difference]: With dead ends: 84 [2019-12-07 16:48:43,347 INFO L226 Difference]: Without dead ends: 80 [2019-12-07 16:48:43,348 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=958, Invalid=1904, Unknown=0, NotChecked=0, Total=2862 [2019-12-07 16:48:43,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-07 16:48:43,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-12-07 16:48:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-07 16:48:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2019-12-07 16:48:43,352 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 141 [2019-12-07 16:48:43,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:43,352 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2019-12-07 16:48:43,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-07 16:48:43,353 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2019-12-07 16:48:43,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-12-07 16:48:43,353 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:43,354 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:43,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:43,554 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:43,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:43,554 INFO L82 PathProgramCache]: Analyzing trace with hash -945685357, now seen corresponding path program 23 times [2019-12-07 16:48:43,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:43,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116881964] [2019-12-07 16:48:43,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-12-07 16:48:44,203 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116881964] [2019-12-07 16:48:44,203 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857136631] [2019-12-07 16:48:44,203 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:44,255 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-12-07 16:48:44,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:44,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 50 conjunts are in the unsatisfiable core [2019-12-07 16:48:44,259 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-12-07 16:48:44,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:44,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28] total 32 [2019-12-07 16:48:44,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555171645] [2019-12-07 16:48:44,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-07 16:48:44,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:44,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-07 16:48:44,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2019-12-07 16:48:44,314 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 32 states. [2019-12-07 16:48:44,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:44,525 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2019-12-07 16:48:44,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-07 16:48:44,525 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2019-12-07 16:48:44,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:44,526 INFO L225 Difference]: With dead ends: 87 [2019-12-07 16:48:44,526 INFO L226 Difference]: Without dead ends: 83 [2019-12-07 16:48:44,527 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1035, Invalid=2045, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 16:48:44,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-07 16:48:44,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-12-07 16:48:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-07 16:48:44,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2019-12-07 16:48:44,530 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 147 [2019-12-07 16:48:44,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:44,530 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2019-12-07 16:48:44,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-07 16:48:44,530 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2019-12-07 16:48:44,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-12-07 16:48:44,531 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:44,531 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:44,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:44,732 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:44,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:44,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1588806697, now seen corresponding path program 24 times [2019-12-07 16:48:44,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:44,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542517309] [2019-12-07 16:48:44,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:48:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-12-07 16:48:45,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542517309] [2019-12-07 16:48:45,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785702414] [2019-12-07 16:48:45,438 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:45,487 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-12-07 16:48:45,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:48:45,488 INFO L264 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 52 conjunts are in the unsatisfiable core [2019-12-07 16:48:45,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:48:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-12-07 16:48:45,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:48:45,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 33 [2019-12-07 16:48:45,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585067490] [2019-12-07 16:48:45,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-07 16:48:45,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:48:45,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-07 16:48:45,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=667, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 16:48:45,549 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 33 states. [2019-12-07 16:48:45,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:48:45,801 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2019-12-07 16:48:45,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-07 16:48:45,801 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 153 [2019-12-07 16:48:45,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:48:45,802 INFO L225 Difference]: With dead ends: 90 [2019-12-07 16:48:45,802 INFO L226 Difference]: Without dead ends: 86 [2019-12-07 16:48:45,804 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1115, Invalid=2191, Unknown=0, NotChecked=0, Total=3306 [2019-12-07 16:48:45,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-07 16:48:45,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-12-07 16:48:45,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-07 16:48:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2019-12-07 16:48:45,808 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 153 [2019-12-07 16:48:45,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:48:45,808 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2019-12-07 16:48:45,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-07 16:48:45,808 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2019-12-07 16:48:45,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-12-07 16:48:45,809 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:48:45,809 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:48:46,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:48:46,010 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:48:46,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:48:46,010 INFO L82 PathProgramCache]: Analyzing trace with hash 959677331, now seen corresponding path program 25 times [2019-12-07 16:48:46,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:48:46,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115014676] [2019-12-07 16:48:46,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:48:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:48:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:48:46,069 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:48:46,069 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 16:48:46,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 04:48:46 BoogieIcfgContainer [2019-12-07 16:48:46,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 16:48:46,099 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:48:46,099 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:48:46,099 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:48:46,100 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:48:26" (3/4) ... [2019-12-07 16:48:46,102 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 16:48:46,142 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e3715c44-7d67-4961-90f2-4b7cbe544b8a/bin/uautomizer/witness.graphml [2019-12-07 16:48:46,142 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:48:46,143 INFO L168 Benchmark]: Toolchain (without parser) took 19569.63 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 564.1 MB). Free memory was 943.6 MB in the beginning and 1.2 GB in the end (delta: -277.3 MB). Peak memory consumption was 286.9 MB. Max. memory is 11.5 GB. [2019-12-07 16:48:46,144 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 958.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:48:46,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.1 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -177.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 16:48:46,144 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.84 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. [2019-12-07 16:48:46,144 INFO L168 Benchmark]: Boogie Preprocessor took 10.00 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. [2019-12-07 16:48:46,145 INFO L168 Benchmark]: RCFGBuilder took 130.12 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: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. [2019-12-07 16:48:46,145 INFO L168 Benchmark]: TraceAbstraction took 19185.47 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 432.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -119.4 MB). Peak memory consumption was 312.6 MB. Max. memory is 11.5 GB. [2019-12-07 16:48:46,145 INFO L168 Benchmark]: Witness Printer took 42.93 ms. Allocated memory is still 1.6 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 11.5 GB. [2019-12-07 16:48:46,147 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 958.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 178.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.1 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -177.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.84 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 10.00 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 130.12 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: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 19185.47 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 432.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -119.4 MB). Peak memory consumption was 312.6 MB. Max. memory is 11.5 GB. * Witness Printer took 42.93 ms. Allocated memory is still 1.6 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 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 = 25; [L11] CALL, EXPR id(input) VAL [\old(x)=25] [L5] COND FALSE !(x==0) VAL [\old(x)=25, x=25] [L6] CALL, EXPR id(x-1) VAL [\old(x)=24] [L5] COND FALSE !(x==0) VAL [\old(x)=24, x=24] [L6] CALL, EXPR id(x-1) VAL [\old(x)=23] [L5] COND FALSE !(x==0) VAL [\old(x)=23, x=23] [L6] CALL, EXPR id(x-1) VAL [\old(x)=22] [L5] COND FALSE !(x==0) VAL [\old(x)=22, x=22] [L6] CALL, EXPR id(x-1) VAL [\old(x)=21] [L5] COND FALSE !(x==0) VAL [\old(x)=21, x=21] [L6] CALL, EXPR id(x-1) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) 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; [L6] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=21, id(x-1)=20, x=21] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=22, id(x-1)=21, x=22] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=23, id(x-1)=22, x=23] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=24, id(x-1)=23, x=24] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=25, id(x-1)=24, x=25] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 25 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 19.1s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 226 SDtfs, 1114 SDslu, 1652 SDs, 0 SdLazy, 1575 SolverSat, 267 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3407 GetRequests, 2562 SyntacticMatches, 0 SemanticMatches, 845 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6143 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 9.1s InterpolantComputationTime, 4200 NumberOfCodeBlocks, 4200 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 3992 ConstructedInterpolants, 0 QuantifiedInterpolants, 1088472 SizeOfPredicates, 331 NumberOfNonLiveVariables, 4776 ConjunctsInSsa, 696 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 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...