./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test24-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/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 45294379b83c6b60e0b0199955cdf7244f057430 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:47:06,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:47:06,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:47:06,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:47:06,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:47:06,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:47:06,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:47:06,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:47:06,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:47:06,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:47:06,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:47:06,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:47:06,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:47:06,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:47:06,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:47:06,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:47:06,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:47:06,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:47:06,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:47:06,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:47:06,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:47:06,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:47:06,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:47:06,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:47:06,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:47:06,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:47:06,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:47:06,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:47:06,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:47:06,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:47:06,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:47:06,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:47:06,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:47:06,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:47:06,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:47:06,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:47:06,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:47:06,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:47:06,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:47:06,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:47:06,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:47:06,849 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:47:06,873 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:47:06,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:47:06,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:47:06,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:47:06,874 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:47:06,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:47:06,875 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:47:06,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:47:06,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:47:06,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:47:06,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:47:06,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:47:06,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:47:06,876 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:47:06,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:47:06,876 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:47:06,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:47:06,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:47:06,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:47:06,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:47:06,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:47:06,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:47:06,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:47:06,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:47:06,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:47:06,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:47:06,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:47:06,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:47:06,879 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_efee1203-ff96-4b9f-bb5e-eaae14df4501/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 -> 45294379b83c6b60e0b0199955cdf7244f057430 [2019-11-25 08:47:07,052 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:47:07,066 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:47:07,068 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:47:07,070 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:47:07,070 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:47:07,071 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test24-2.c [2019-11-25 08:47:07,132 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/data/4580040d3/f15736e9c7da4d658403f7d8bee81f80/FLAG9d75cb1d4 [2019-11-25 08:47:07,498 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:47:07,499 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/sv-benchmarks/c/ldv-regression/test24-2.c [2019-11-25 08:47:07,504 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/data/4580040d3/f15736e9c7da4d658403f7d8bee81f80/FLAG9d75cb1d4 [2019-11-25 08:47:07,877 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/data/4580040d3/f15736e9c7da4d658403f7d8bee81f80 [2019-11-25 08:47:07,879 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:47:07,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:47:07,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:47:07,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:47:07,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:47:07,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:47:07" (1/1) ... [2019-11-25 08:47:07,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b0b6f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:07, skipping insertion in model container [2019-11-25 08:47:07,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:47:07" (1/1) ... [2019-11-25 08:47:07,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:47:07,909 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:47:08,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:47:08,194 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:47:08,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:47:08,225 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:47:08,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08 WrapperNode [2019-11-25 08:47:08,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:47:08,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:47:08,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:47:08,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:47:08,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,260 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:47:08,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:47:08,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:47:08,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:47:08,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:47:08,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:47:08,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:47:08,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:47:08,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:47:08,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-25 08:47:08,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:47:08,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:47:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-25 08:47:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-25 08:47:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:47:08,578 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:47:08,578 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-25 08:47:08,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:47:08 BoogieIcfgContainer [2019-11-25 08:47:08,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:47:08,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:47:08,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:47:08,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:47:08,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:47:07" (1/3) ... [2019-11-25 08:47:08,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384253ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:47:08, skipping insertion in model container [2019-11-25 08:47:08,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (2/3) ... [2019-11-25 08:47:08,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384253ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:47:08, skipping insertion in model container [2019-11-25 08:47:08,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:47:08" (3/3) ... [2019-11-25 08:47:08,586 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2019-11-25 08:47:08,595 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:47:08,600 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:47:08,610 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:47:08,630 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:47:08,631 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:47:08,631 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:47:08,631 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:47:08,631 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:47:08,631 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:47:08,631 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:47:08,631 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:47:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-25 08:47:08,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:47:08,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:08,650 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:08,650 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:08,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1829445793, now seen corresponding path program 1 times [2019-11-25 08:47:08,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:08,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102556982] [2019-11-25 08:47:08,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:08,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102556982] [2019-11-25 08:47:08,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:47:08,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-25 08:47:08,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172616907] [2019-11-25 08:47:08,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-25 08:47:08,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:08,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-25 08:47:08,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:47:08,811 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-25 08:47:08,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:08,823 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-11-25 08:47:08,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-25 08:47:08,825 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-25 08:47:08,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:08,832 INFO L225 Difference]: With dead ends: 30 [2019-11-25 08:47:08,832 INFO L226 Difference]: Without dead ends: 13 [2019-11-25 08:47:08,834 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:47:08,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-25 08:47:08,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-25 08:47:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-25 08:47:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-25 08:47:08,859 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-11-25 08:47:08,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:08,859 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-25 08:47:08,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-25 08:47:08,859 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-25 08:47:08,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-25 08:47:08,860 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:08,860 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:08,860 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:08,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:08,861 INFO L82 PathProgramCache]: Analyzing trace with hash 672236885, now seen corresponding path program 1 times [2019-11-25 08:47:08,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:08,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516354689] [2019-11-25 08:47:08,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:08,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516354689] [2019-11-25 08:47:08,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:47:08,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-25 08:47:08,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143841293] [2019-11-25 08:47:08,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:47:08,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:08,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:47:08,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:47:08,908 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-11-25 08:47:08,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:08,938 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-25 08:47:08,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:47:08,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-25 08:47:08,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:08,939 INFO L225 Difference]: With dead ends: 24 [2019-11-25 08:47:08,939 INFO L226 Difference]: Without dead ends: 15 [2019-11-25 08:47:08,939 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:47:08,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-25 08:47:08,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-25 08:47:08,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-25 08:47:08,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-25 08:47:08,943 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-11-25 08:47:08,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:08,943 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-25 08:47:08,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:47:08,944 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-25 08:47:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:47:08,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:08,944 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:08,944 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:08,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:08,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1835948819, now seen corresponding path program 1 times [2019-11-25 08:47:08,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:08,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858924556] [2019-11-25 08:47:08,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:09,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858924556] [2019-11-25 08:47:09,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946722101] [2019-11-25 08:47:09,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:09,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:47:09,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:09,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:09,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-25 08:47:09,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15340083] [2019-11-25 08:47:09,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:47:09,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:09,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:47:09,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:47:09,112 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-11-25 08:47:09,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:09,137 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-11-25 08:47:09,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:47:09,137 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-25 08:47:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:09,138 INFO L225 Difference]: With dead ends: 26 [2019-11-25 08:47:09,138 INFO L226 Difference]: Without dead ends: 17 [2019-11-25 08:47:09,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:47:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-25 08:47:09,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-25 08:47:09,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-25 08:47:09,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-25 08:47:09,143 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-11-25 08:47:09,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:09,143 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-25 08:47:09,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:47:09,144 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-25 08:47:09,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-25 08:47:09,144 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:09,144 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:09,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:09,348 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:09,348 INFO L82 PathProgramCache]: Analyzing trace with hash -823346863, now seen corresponding path program 2 times [2019-11-25 08:47:09,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:09,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136691362] [2019-11-25 08:47:09,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:09,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136691362] [2019-11-25 08:47:09,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793318535] [2019-11-25 08:47:09,437 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:09,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:47:09,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:09,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:47:09,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:09,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:09,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-25 08:47:09,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572547122] [2019-11-25 08:47:09,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:47:09,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:09,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:47:09,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:47:09,528 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2019-11-25 08:47:09,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:09,559 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2019-11-25 08:47:09,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:47:09,562 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-25 08:47:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:09,562 INFO L225 Difference]: With dead ends: 28 [2019-11-25 08:47:09,562 INFO L226 Difference]: Without dead ends: 19 [2019-11-25 08:47:09,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:47:09,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-25 08:47:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-25 08:47:09,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-25 08:47:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-25 08:47:09,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2019-11-25 08:47:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:09,566 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-25 08:47:09,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:47:09,567 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-25 08:47:09,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:47:09,568 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:09,569 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:09,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:09,772 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:09,772 INFO L82 PathProgramCache]: Analyzing trace with hash -900956145, now seen corresponding path program 3 times [2019-11-25 08:47:09,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:09,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088311716] [2019-11-25 08:47:09,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:09,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088311716] [2019-11-25 08:47:09,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115608361] [2019-11-25 08:47:09,858 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:09,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-25 08:47:09,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:09,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:47:09,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:09,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:09,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-25 08:47:09,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714499927] [2019-11-25 08:47:09,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:47:09,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:09,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:47:09,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:47:09,947 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2019-11-25 08:47:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:09,976 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-25 08:47:09,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:47:09,976 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-25 08:47:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:09,977 INFO L225 Difference]: With dead ends: 30 [2019-11-25 08:47:09,977 INFO L226 Difference]: Without dead ends: 21 [2019-11-25 08:47:09,978 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:47:09,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-25 08:47:09,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-25 08:47:09,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-25 08:47:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-25 08:47:09,981 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2019-11-25 08:47:09,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:09,982 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-25 08:47:09,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:47:09,982 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-25 08:47:09,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-25 08:47:09,983 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:09,983 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:10,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:10,187 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:10,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1825935181, now seen corresponding path program 4 times [2019-11-25 08:47:10,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:10,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919092351] [2019-11-25 08:47:10,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:10,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919092351] [2019-11-25 08:47:10,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894312257] [2019-11-25 08:47:10,292 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:10,342 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:47:10,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:10,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:47:10,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:10,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:10,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-25 08:47:10,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714324211] [2019-11-25 08:47:10,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:47:10,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:10,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:47:10,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:47:10,369 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2019-11-25 08:47:10,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:10,399 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-11-25 08:47:10,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:47:10,400 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-11-25 08:47:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:10,401 INFO L225 Difference]: With dead ends: 32 [2019-11-25 08:47:10,401 INFO L226 Difference]: Without dead ends: 23 [2019-11-25 08:47:10,402 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:47:10,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-25 08:47:10,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-25 08:47:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-25 08:47:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-25 08:47:10,405 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2019-11-25 08:47:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:10,405 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-25 08:47:10,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:47:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-25 08:47:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-25 08:47:10,406 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:10,406 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:10,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:10,607 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:10,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1856518389, now seen corresponding path program 5 times [2019-11-25 08:47:10,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:10,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48571113] [2019-11-25 08:47:10,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:10,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48571113] [2019-11-25 08:47:10,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510988264] [2019-11-25 08:47:10,691 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:10,750 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-25 08:47:10,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:10,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:47:10,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:10,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:10,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-25 08:47:10,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772310295] [2019-11-25 08:47:10,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-25 08:47:10,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:10,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:47:10,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:47:10,767 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-11-25 08:47:10,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:10,800 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-25 08:47:10,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:47:10,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-25 08:47:10,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:10,801 INFO L225 Difference]: With dead ends: 34 [2019-11-25 08:47:10,801 INFO L226 Difference]: Without dead ends: 25 [2019-11-25 08:47:10,802 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:47:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-25 08:47:10,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-25 08:47:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-25 08:47:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-25 08:47:10,806 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2019-11-25 08:47:10,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:10,806 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-25 08:47:10,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-25 08:47:10,806 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-25 08:47:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-25 08:47:10,807 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:10,807 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:11,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:11,010 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:11,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:11,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1641347255, now seen corresponding path program 6 times [2019-11-25 08:47:11,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:11,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597012602] [2019-11-25 08:47:11,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:11,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597012602] [2019-11-25 08:47:11,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199704950] [2019-11-25 08:47:11,097 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:11,203 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-25 08:47:11,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:11,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:47:11,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:11,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:11,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-25 08:47:11,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176375392] [2019-11-25 08:47:11,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:47:11,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:11,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:47:11,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:47:11,225 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2019-11-25 08:47:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:11,271 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-25 08:47:11,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:47:11,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-25 08:47:11,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:11,274 INFO L225 Difference]: With dead ends: 36 [2019-11-25 08:47:11,274 INFO L226 Difference]: Without dead ends: 27 [2019-11-25 08:47:11,274 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:47:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-25 08:47:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-25 08:47:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:47:11,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-25 08:47:11,278 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2019-11-25 08:47:11,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:11,279 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-25 08:47:11,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:47:11,279 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-25 08:47:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-25 08:47:11,280 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:11,280 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:11,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:11,488 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:11,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1020317689, now seen corresponding path program 7 times [2019-11-25 08:47:11,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:11,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581228099] [2019-11-25 08:47:11,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:11,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581228099] [2019-11-25 08:47:11,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543904512] [2019-11-25 08:47:11,618 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:11,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:47:11,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:11,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:11,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-25 08:47:11,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248204713] [2019-11-25 08:47:11,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-25 08:47:11,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:11,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-25 08:47:11,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:47:11,682 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-25 08:47:11,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:11,737 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-11-25 08:47:11,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:47:11,738 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-25 08:47:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:11,739 INFO L225 Difference]: With dead ends: 38 [2019-11-25 08:47:11,739 INFO L226 Difference]: Without dead ends: 29 [2019-11-25 08:47:11,740 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:47:11,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-25 08:47:11,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-25 08:47:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-25 08:47:11,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-25 08:47:11,746 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2019-11-25 08:47:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:11,747 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-25 08:47:11,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-25 08:47:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-25 08:47:11,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-25 08:47:11,748 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:11,748 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:11,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:11,949 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:11,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:11,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1211358907, now seen corresponding path program 8 times [2019-11-25 08:47:11,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:11,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120400178] [2019-11-25 08:47:11,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:12,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120400178] [2019-11-25 08:47:12,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339705366] [2019-11-25 08:47:12,084 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:12,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:47:12,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:12,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:47:12,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:12,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:12,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-25 08:47:12,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096065991] [2019-11-25 08:47:12,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:47:12,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:12,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:47:12,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:47:12,169 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2019-11-25 08:47:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:12,229 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-11-25 08:47:12,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:47:12,232 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-25 08:47:12,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:12,232 INFO L225 Difference]: With dead ends: 40 [2019-11-25 08:47:12,232 INFO L226 Difference]: Without dead ends: 31 [2019-11-25 08:47:12,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:47:12,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-25 08:47:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-25 08:47:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-25 08:47:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-25 08:47:12,237 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2019-11-25 08:47:12,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:12,237 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-25 08:47:12,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:47:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-25 08:47:12,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-25 08:47:12,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:12,238 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:12,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:12,446 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:12,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash -118375677, now seen corresponding path program 9 times [2019-11-25 08:47:12,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:12,450 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668624557] [2019-11-25 08:47:12,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:12,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668624557] [2019-11-25 08:47:12,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386741711] [2019-11-25 08:47:12,589 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:12,860 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-25 08:47:12,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:12,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:47:12,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:12,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:12,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-25 08:47:12,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125896381] [2019-11-25 08:47:12,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-25 08:47:12,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:12,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-25 08:47:12,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:47:12,886 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2019-11-25 08:47:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:12,945 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-11-25 08:47:12,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-25 08:47:12,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-11-25 08:47:12,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:12,947 INFO L225 Difference]: With dead ends: 42 [2019-11-25 08:47:12,947 INFO L226 Difference]: Without dead ends: 33 [2019-11-25 08:47:12,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:47:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-25 08:47:12,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-11-25 08:47:12,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-25 08:47:12,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-25 08:47:12,951 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2019-11-25 08:47:12,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:12,951 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-25 08:47:12,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-25 08:47:12,951 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-25 08:47:12,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-25 08:47:12,952 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:12,952 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:13,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:13,160 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:13,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:13,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2028479167, now seen corresponding path program 10 times [2019-11-25 08:47:13,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:13,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495087688] [2019-11-25 08:47:13,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:13,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495087688] [2019-11-25 08:47:13,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528589418] [2019-11-25 08:47:13,313 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:13,375 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:47:13,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:13,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-25 08:47:13,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:13,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:13,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-25 08:47:13,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990976155] [2019-11-25 08:47:13,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-25 08:47:13,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:13,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-25 08:47:13,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:47:13,393 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2019-11-25 08:47:13,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:13,446 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-11-25 08:47:13,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-25 08:47:13,446 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-11-25 08:47:13,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:13,447 INFO L225 Difference]: With dead ends: 44 [2019-11-25 08:47:13,447 INFO L226 Difference]: Without dead ends: 35 [2019-11-25 08:47:13,448 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:47:13,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-25 08:47:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-25 08:47:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-25 08:47:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-11-25 08:47:13,452 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2019-11-25 08:47:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:13,452 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-11-25 08:47:13,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-25 08:47:13,452 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-11-25 08:47:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-25 08:47:13,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:13,453 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:13,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:13,656 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:13,656 INFO L82 PathProgramCache]: Analyzing trace with hash 608069631, now seen corresponding path program 11 times [2019-11-25 08:47:13,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:13,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357953585] [2019-11-25 08:47:13,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:13,807 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357953585] [2019-11-25 08:47:13,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150637169] [2019-11-25 08:47:13,808 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:14,057 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-25 08:47:14,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:14,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-25 08:47:14,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:14,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:14,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-25 08:47:14,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183702704] [2019-11-25 08:47:14,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-25 08:47:14,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:14,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-25 08:47:14,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:47:14,081 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 15 states. [2019-11-25 08:47:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:14,141 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-11-25 08:47:14,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-25 08:47:14,142 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2019-11-25 08:47:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:14,142 INFO L225 Difference]: With dead ends: 46 [2019-11-25 08:47:14,142 INFO L226 Difference]: Without dead ends: 37 [2019-11-25 08:47:14,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:47:14,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-25 08:47:14,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-25 08:47:14,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-25 08:47:14,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-11-25 08:47:14,146 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2019-11-25 08:47:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:14,146 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-11-25 08:47:14,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-25 08:47:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-11-25 08:47:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-25 08:47:14,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:14,147 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:14,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:14,348 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:14,348 INFO L82 PathProgramCache]: Analyzing trace with hash 300759869, now seen corresponding path program 12 times [2019-11-25 08:47:14,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:14,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952854990] [2019-11-25 08:47:14,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:14,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952854990] [2019-11-25 08:47:14,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832050008] [2019-11-25 08:47:14,501 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:15,410 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-25 08:47:15,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:15,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-25 08:47:15,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:15,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:15,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-25 08:47:15,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819013424] [2019-11-25 08:47:15,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-25 08:47:15,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:15,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-25 08:47:15,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:47:15,433 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2019-11-25 08:47:15,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:15,501 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-11-25 08:47:15,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-25 08:47:15,502 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2019-11-25 08:47:15,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:15,502 INFO L225 Difference]: With dead ends: 48 [2019-11-25 08:47:15,502 INFO L226 Difference]: Without dead ends: 39 [2019-11-25 08:47:15,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:47:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-25 08:47:15,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-11-25 08:47:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-25 08:47:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-25 08:47:15,507 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2019-11-25 08:47:15,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:15,507 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-25 08:47:15,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-25 08:47:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-25 08:47:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-25 08:47:15,508 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:15,509 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:15,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:15,717 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:15,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1328822011, now seen corresponding path program 13 times [2019-11-25 08:47:15,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:15,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020758169] [2019-11-25 08:47:15,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:15,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020758169] [2019-11-25 08:47:15,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681213216] [2019-11-25 08:47:15,874 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:15,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-25 08:47:15,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:15,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:15,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-25 08:47:15,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047169639] [2019-11-25 08:47:15,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-25 08:47:15,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:15,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-25 08:47:15,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-25 08:47:15,980 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-11-25 08:47:16,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:16,023 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-11-25 08:47:16,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-25 08:47:16,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2019-11-25 08:47:16,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:16,024 INFO L225 Difference]: With dead ends: 50 [2019-11-25 08:47:16,025 INFO L226 Difference]: Without dead ends: 41 [2019-11-25 08:47:16,025 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-25 08:47:16,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-25 08:47:16,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-25 08:47:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-25 08:47:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-11-25 08:47:16,029 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2019-11-25 08:47:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:16,029 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-11-25 08:47:16,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-25 08:47:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-11-25 08:47:16,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-25 08:47:16,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:16,030 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:16,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:16,233 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:16,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:16,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1454062393, now seen corresponding path program 14 times [2019-11-25 08:47:16,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:16,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316830977] [2019-11-25 08:47:16,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:16,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316830977] [2019-11-25 08:47:16,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350760502] [2019-11-25 08:47:16,420 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:16,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:47:16,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:16,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:47:16,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:16,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:16,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-25 08:47:16,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837007565] [2019-11-25 08:47:16,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-25 08:47:16,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:16,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-25 08:47:16,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:47:16,513 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2019-11-25 08:47:16,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:16,581 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-11-25 08:47:16,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-25 08:47:16,582 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2019-11-25 08:47:16,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:16,582 INFO L225 Difference]: With dead ends: 52 [2019-11-25 08:47:16,582 INFO L226 Difference]: Without dead ends: 43 [2019-11-25 08:47:16,583 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:47:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-25 08:47:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-25 08:47:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-25 08:47:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-25 08:47:16,586 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2019-11-25 08:47:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:16,587 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-25 08:47:16,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-25 08:47:16,587 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-25 08:47:16,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-25 08:47:16,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:16,588 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:16,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:16,791 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:16,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:16,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1550985207, now seen corresponding path program 15 times [2019-11-25 08:47:16,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:16,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572751327] [2019-11-25 08:47:16,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:17,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572751327] [2019-11-25 08:47:17,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25056013] [2019-11-25 08:47:17,026 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/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 [2019-11-25 08:47:18,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-25 08:47:18,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:18,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-25 08:47:18,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:18,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:18,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-25 08:47:18,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349815689] [2019-11-25 08:47:18,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-25 08:47:18,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:18,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-25 08:47:18,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:47:18,358 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 19 states. [2019-11-25 08:47:18,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:18,417 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-11-25 08:47:18,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-25 08:47:18,418 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2019-11-25 08:47:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:18,418 INFO L225 Difference]: With dead ends: 54 [2019-11-25 08:47:18,418 INFO L226 Difference]: Without dead ends: 45 [2019-11-25 08:47:18,419 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:47:18,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-25 08:47:18,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-25 08:47:18,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-25 08:47:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-25 08:47:18,423 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2019-11-25 08:47:18,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:18,423 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-25 08:47:18,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-25 08:47:18,423 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-25 08:47:18,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-25 08:47:18,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:18,424 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:18,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:18,628 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:18,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:18,628 INFO L82 PathProgramCache]: Analyzing trace with hash 204528949, now seen corresponding path program 16 times [2019-11-25 08:47:18,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:18,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919111574] [2019-11-25 08:47:18,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:18,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919111574] [2019-11-25 08:47:18,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949650705] [2019-11-25 08:47:18,855 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/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 [2019-11-25 08:47:18,903 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:47:18,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:18,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-25 08:47:18,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:18,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:18,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-25 08:47:18,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536636723] [2019-11-25 08:47:18,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-25 08:47:18,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:18,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-25 08:47:18,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-25 08:47:18,927 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2019-11-25 08:47:18,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:18,990 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-11-25 08:47:18,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-25 08:47:18,991 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2019-11-25 08:47:18,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:18,991 INFO L225 Difference]: With dead ends: 56 [2019-11-25 08:47:18,991 INFO L226 Difference]: Without dead ends: 47 [2019-11-25 08:47:18,992 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-25 08:47:18,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-25 08:47:18,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-11-25 08:47:18,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-25 08:47:18,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-11-25 08:47:18,994 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2019-11-25 08:47:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:18,995 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-11-25 08:47:18,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-25 08:47:18,995 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-11-25 08:47:18,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-25 08:47:18,995 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:18,995 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:19,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:19,199 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:19,199 INFO L82 PathProgramCache]: Analyzing trace with hash -954778893, now seen corresponding path program 17 times [2019-11-25 08:47:19,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:19,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555523693] [2019-11-25 08:47:19,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:19,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555523693] [2019-11-25 08:47:19,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205884725] [2019-11-25 08:47:19,414 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/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 [2019-11-25 08:47:20,373 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-25 08:47:20,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:20,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-25 08:47:20,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:20,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:20,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-25 08:47:20,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097211669] [2019-11-25 08:47:20,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-25 08:47:20,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:20,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-25 08:47:20,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-25 08:47:20,408 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 21 states. [2019-11-25 08:47:20,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:20,472 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-11-25 08:47:20,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-25 08:47:20,473 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2019-11-25 08:47:20,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:20,473 INFO L225 Difference]: With dead ends: 58 [2019-11-25 08:47:20,473 INFO L226 Difference]: Without dead ends: 49 [2019-11-25 08:47:20,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-25 08:47:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-25 08:47:20,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-11-25 08:47:20,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-25 08:47:20,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-11-25 08:47:20,477 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2019-11-25 08:47:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:20,477 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-11-25 08:47:20,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-25 08:47:20,478 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-11-25 08:47:20,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-25 08:47:20,478 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:20,478 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:20,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:20,679 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:20,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:20,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1641881905, now seen corresponding path program 18 times [2019-11-25 08:47:20,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:20,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403214259] [2019-11-25 08:47:20,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:20,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403214259] [2019-11-25 08:47:20,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578741609] [2019-11-25 08:47:20,922 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/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 [2019-11-25 08:47:25,655 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-25 08:47:25,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:25,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-25 08:47:25,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:25,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:25,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-25 08:47:25,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405045137] [2019-11-25 08:47:25,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-25 08:47:25,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:25,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-25 08:47:25,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-25 08:47:25,700 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 22 states. [2019-11-25 08:47:25,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:25,760 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-11-25 08:47:25,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-25 08:47:25,760 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2019-11-25 08:47:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:25,761 INFO L225 Difference]: With dead ends: 60 [2019-11-25 08:47:25,761 INFO L226 Difference]: Without dead ends: 51 [2019-11-25 08:47:25,761 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-25 08:47:25,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-25 08:47:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-11-25 08:47:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-25 08:47:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-25 08:47:25,764 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2019-11-25 08:47:25,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:25,764 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-25 08:47:25,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-25 08:47:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-25 08:47:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-25 08:47:25,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:25,765 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:25,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:25,972 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:25,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:25,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1656909807, now seen corresponding path program 19 times [2019-11-25 08:47:25,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:25,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370681452] [2019-11-25 08:47:25,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:26,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370681452] [2019-11-25 08:47:26,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297577972] [2019-11-25 08:47:26,275 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/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 [2019-11-25 08:47:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:26,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-25 08:47:26,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:26,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:26,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-25 08:47:26,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409666842] [2019-11-25 08:47:26,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-25 08:47:26,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:26,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-25 08:47:26,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-25 08:47:26,354 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 23 states. [2019-11-25 08:47:26,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:26,422 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2019-11-25 08:47:26,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-25 08:47:26,422 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2019-11-25 08:47:26,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:26,423 INFO L225 Difference]: With dead ends: 61 [2019-11-25 08:47:26,423 INFO L226 Difference]: Without dead ends: 52 [2019-11-25 08:47:26,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-25 08:47:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-25 08:47:26,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-25 08:47:26,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-25 08:47:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-11-25 08:47:26,430 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2019-11-25 08:47:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:26,430 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-11-25 08:47:26,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-25 08:47:26,431 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-11-25 08:47:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-25 08:47:26,435 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:26,436 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:26,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:26,639 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:47:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:26,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1081145555, now seen corresponding path program 20 times [2019-11-25 08:47:26,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:26,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810464639] [2019-11-25 08:47:26,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:26,804 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:26,804 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:47:26,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:47:26 BoogieIcfgContainer [2019-11-25 08:47:26,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:47:26,847 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:47:26,847 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:47:26,847 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:47:26,848 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:47:08" (3/4) ... [2019-11-25 08:47:26,849 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:47:26,911 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_efee1203-ff96-4b9f-bb5e-eaae14df4501/bin/uautomizer/witness.graphml [2019-11-25 08:47:26,911 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:47:26,913 INFO L168 Benchmark]: Toolchain (without parser) took 19032.28 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 230.2 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -112.5 MB). Peak memory consumption was 117.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:26,913 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:47:26,914 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 198.2 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -241.5 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:26,914 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:47:26,914 INFO L168 Benchmark]: Boogie Preprocessor took 35.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:47:26,915 INFO L168 Benchmark]: RCFGBuilder took 283.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:26,915 INFO L168 Benchmark]: TraceAbstraction took 18266.32 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 32.0 MB). Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Peak memory consumption was 131.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:26,915 INFO L168 Benchmark]: Witness Printer took 63.94 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:26,917 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 345.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 198.2 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -241.5 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 35.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 283.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 18266.32 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 32.0 MB). Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Peak memory consumption was 131.1 MB. Max. memory is 11.5 GB. * Witness Printer took 63.94 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 18.2s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 210 SDslu, 1430 SDs, 0 SdLazy, 618 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=21, 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, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 9.0s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 1250 NumberOfCodeBlocks, 1250 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1159 ConstructedInterpolants, 0 QuantifiedInterpolants, 95961 SizeOfPredicates, 19 NumberOfNonLiveVariables, 2660 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 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...