./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum20.i -s /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 15b22eac1c9abf5483bb158aadbf00f9ee3ca223 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-a4ecdab [2020-11-29 20:12:23,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:12:23,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:12:23,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:12:23,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:12:23,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:12:23,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:12:23,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:12:23,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:12:23,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:12:23,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:12:23,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:12:23,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:12:23,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:12:23,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:12:23,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:12:23,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:12:23,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:12:23,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:12:23,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:12:23,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:12:23,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:12:23,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:12:23,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:12:23,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:12:23,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:12:23,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:12:23,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:12:23,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:12:23,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:12:23,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:12:23,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:12:23,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:12:23,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:12:23,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:12:23,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:12:23,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:12:23,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:12:23,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:12:23,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:12:23,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:12:23,975 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 20:12:24,024 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:12:24,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:12:24,028 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:12:24,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:12:24,028 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:12:24,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:12:24,029 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:12:24,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:12:24,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:12:24,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:12:24,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:12:24,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:12:24,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:12:24,032 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:12:24,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:12:24,032 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:12:24,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:12:24,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:12:24,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:12:24,034 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:12:24,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:12:24,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:12:24,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:12:24,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:12:24,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:12:24,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:12:24,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:12:24,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:12:24,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:12:24,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15b22eac1c9abf5483bb158aadbf00f9ee3ca223 [2020-11-29 20:12:24,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:12:24,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:12:24,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:12:24,415 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:12:24,417 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:12:24,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/../../sv-benchmarks/c/reducercommutativity/rangesum20.i [2020-11-29 20:12:24,530 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/data/9e87f0583/e55103f47b284b4dbd4732a4f42ae03e/FLAG82aa029b0 [2020-11-29 20:12:25,069 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:12:25,069 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/sv-benchmarks/c/reducercommutativity/rangesum20.i [2020-11-29 20:12:25,077 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/data/9e87f0583/e55103f47b284b4dbd4732a4f42ae03e/FLAG82aa029b0 [2020-11-29 20:12:25,403 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/data/9e87f0583/e55103f47b284b4dbd4732a4f42ae03e [2020-11-29 20:12:25,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:12:25,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:12:25,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:12:25,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:12:25,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:12:25,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:12:25" (1/1) ... [2020-11-29 20:12:25,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10f1ad8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:25, skipping insertion in model container [2020-11-29 20:12:25,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:12:25" (1/1) ... [2020-11-29 20:12:25,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:12:25,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:12:25,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:12:25,792 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:12:25,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:12:25,841 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:12:25,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:25 WrapperNode [2020-11-29 20:12:25,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:12:25,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:12:25,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:12:25,846 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:12:25,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:25" (1/1) ... [2020-11-29 20:12:25,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:25" (1/1) ... [2020-11-29 20:12:25,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:12:25,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:12:25,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:12:25,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:12:25,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:25" (1/1) ... [2020-11-29 20:12:25,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:25" (1/1) ... [2020-11-29 20:12:25,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:25" (1/1) ... [2020-11-29 20:12:25,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:25" (1/1) ... [2020-11-29 20:12:25,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:25" (1/1) ... [2020-11-29 20:12:25,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:25" (1/1) ... [2020-11-29 20:12:25,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:25" (1/1) ... [2020-11-29 20:12:25,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:12:25,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:12:25,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:12:25,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:12:25,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:26,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 20:12:26,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:12:26,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 20:12:26,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:12:26,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:12:26,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 20:12:26,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 20:12:26,650 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:12:26,651 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-11-29 20:12:26,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:12:26 BoogieIcfgContainer [2020-11-29 20:12:26,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:12:26,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:12:26,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:12:26,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:12:26,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:12:25" (1/3) ... [2020-11-29 20:12:26,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105af88a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:12:26, skipping insertion in model container [2020-11-29 20:12:26,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:25" (2/3) ... [2020-11-29 20:12:26,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105af88a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:12:26, skipping insertion in model container [2020-11-29 20:12:26,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:12:26" (3/3) ... [2020-11-29 20:12:26,664 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum20.i [2020-11-29 20:12:26,678 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:12:26,683 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 20:12:26,698 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 20:12:26,728 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:12:26,728 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:12:26,729 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:12:26,729 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:12:26,729 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:12:26,729 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:12:26,729 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:12:26,730 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:12:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-29 20:12:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 20:12:26,754 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:26,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:26,755 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:26,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:26,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1570593938, now seen corresponding path program 1 times [2020-11-29 20:12:26,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:26,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915153397] [2020-11-29 20:12:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:12:26,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915153397] [2020-11-29 20:12:26,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:12:26,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 20:12:26,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090128894] [2020-11-29 20:12:26,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 20:12:26,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:26,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 20:12:26,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:12:26,962 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-11-29 20:12:26,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:26,984 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2020-11-29 20:12:26,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 20:12:26,986 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-11-29 20:12:26,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:26,996 INFO L225 Difference]: With dead ends: 58 [2020-11-29 20:12:26,996 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 20:12:27,000 INFO L677 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 [2020-11-29 20:12:27,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 20:12:27,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 20:12:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 20:12:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-11-29 20:12:27,040 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2020-11-29 20:12:27,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:27,041 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-11-29 20:12:27,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 20:12:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-11-29 20:12:27,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 20:12:27,043 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:27,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:27,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:12:27,044 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:27,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:27,045 INFO L82 PathProgramCache]: Analyzing trace with hash 813479325, now seen corresponding path program 1 times [2020-11-29 20:12:27,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:27,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622315986] [2020-11-29 20:12:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:27,069 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:27,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924091138] [2020-11-29 20:12:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:27,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 20:12:27,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:12:27,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622315986] [2020-11-29 20:12:27,299 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:27,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924091138] [2020-11-29 20:12:27,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:12:27,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 20:12:27,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355139907] [2020-11-29 20:12:27,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 20:12:27,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:27,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 20:12:27,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 20:12:27,304 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-11-29 20:12:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:27,342 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2020-11-29 20:12:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 20:12:27,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-11-29 20:12:27,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:27,348 INFO L225 Difference]: With dead ends: 52 [2020-11-29 20:12:27,348 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 20:12:27,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 20:12:27,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 20:12:27,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-11-29 20:12:27,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 20:12:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-29 20:12:27,363 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 18 [2020-11-29 20:12:27,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:27,365 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-29 20:12:27,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 20:12:27,365 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-29 20:12:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 20:12:27,366 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:27,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:27,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 20:12:27,590 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:27,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:27,591 INFO L82 PathProgramCache]: Analyzing trace with hash -552235489, now seen corresponding path program 1 times [2020-11-29 20:12:27,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:27,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53855841] [2020-11-29 20:12:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:12:27,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53855841] [2020-11-29 20:12:27,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824125095] [2020-11-29 20:12:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:27,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 20:12:27,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 20:12:27,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:27,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-11-29 20:12:27,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999512743] [2020-11-29 20:12:27,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 20:12:27,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:27,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 20:12:27,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:12:27,878 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 3 states. [2020-11-29 20:12:27,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:27,970 INFO L93 Difference]: Finished difference Result 59 states and 84 transitions. [2020-11-29 20:12:27,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 20:12:27,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-11-29 20:12:27,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:27,972 INFO L225 Difference]: With dead ends: 59 [2020-11-29 20:12:27,972 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 20:12:27,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:12:27,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 20:12:27,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-11-29 20:12:27,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-29 20:12:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-11-29 20:12:27,980 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2020-11-29 20:12:27,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:27,980 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-11-29 20:12:27,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 20:12:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-11-29 20:12:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 20:12:27,982 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:27,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:28,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:28,204 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:28,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:28,204 INFO L82 PathProgramCache]: Analyzing trace with hash -745215302, now seen corresponding path program 1 times [2020-11-29 20:12:28,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:28,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006421436] [2020-11-29 20:12:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 20:12:28,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006421436] [2020-11-29 20:12:28,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949826891] [2020-11-29 20:12:28,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:28,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 20:12:28,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:12:28,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:28,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-11-29 20:12:28,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080588454] [2020-11-29 20:12:28,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 20:12:28,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:28,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 20:12:28,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:12:28,465 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-11-29 20:12:28,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:28,490 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-11-29 20:12:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 20:12:28,492 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-11-29 20:12:28,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:28,493 INFO L225 Difference]: With dead ends: 48 [2020-11-29 20:12:28,493 INFO L226 Difference]: Without dead ends: 36 [2020-11-29 20:12:28,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:12:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-29 20:12:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-11-29 20:12:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-29 20:12:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-11-29 20:12:28,500 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 29 [2020-11-29 20:12:28,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:28,501 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-11-29 20:12:28,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 20:12:28,501 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-11-29 20:12:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 20:12:28,508 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:28,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:28,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:28,709 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:28,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:28,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1253041416, now seen corresponding path program 1 times [2020-11-29 20:12:28,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:28,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386396101] [2020-11-29 20:12:28,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:12:28,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386396101] [2020-11-29 20:12:28,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736491054] [2020-11-29 20:12:28,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:28,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 20:12:28,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 20:12:28,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:28,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-11-29 20:12:28,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428005149] [2020-11-29 20:12:28,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 20:12:28,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:28,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 20:12:28,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:12:28,904 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 3 states. [2020-11-29 20:12:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:29,032 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2020-11-29 20:12:29,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 20:12:29,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-11-29 20:12:29,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:29,034 INFO L225 Difference]: With dead ends: 81 [2020-11-29 20:12:29,034 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 20:12:29,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:12:29,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 20:12:29,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-11-29 20:12:29,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-29 20:12:29,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2020-11-29 20:12:29,042 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 31 [2020-11-29 20:12:29,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:29,043 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2020-11-29 20:12:29,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 20:12:29,043 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2020-11-29 20:12:29,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 20:12:29,044 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:29,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:29,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:29,245 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:29,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:29,246 INFO L82 PathProgramCache]: Analyzing trace with hash -828492548, now seen corresponding path program 1 times [2020-11-29 20:12:29,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:29,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148483016] [2020-11-29 20:12:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:12:29,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148483016] [2020-11-29 20:12:29,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626497032] [2020-11-29 20:12:29,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:29,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 20:12:29,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:12:29,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:12:29,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-29 20:12:29,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136322360] [2020-11-29 20:12:29,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:12:29,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:29,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:12:29,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:12:29,437 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand 5 states. [2020-11-29 20:12:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:29,475 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2020-11-29 20:12:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:12:29,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-11-29 20:12:29,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:29,477 INFO L225 Difference]: With dead ends: 92 [2020-11-29 20:12:29,477 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 20:12:29,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:12:29,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 20:12:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-11-29 20:12:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-29 20:12:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2020-11-29 20:12:29,485 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 31 [2020-11-29 20:12:29,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:29,486 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2020-11-29 20:12:29,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:12:29,486 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2020-11-29 20:12:29,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 20:12:29,487 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:29,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:29,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 20:12:29,688 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:29,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:29,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1808056250, now seen corresponding path program 2 times [2020-11-29 20:12:29,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:29,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937707602] [2020-11-29 20:12:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 20:12:29,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937707602] [2020-11-29 20:12:29,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814318288] [2020-11-29 20:12:29,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:29,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 20:12:29,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:29,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 20:12:29,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 20:12:30,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:30,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-11-29 20:12:30,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516379251] [2020-11-29 20:12:30,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:12:30,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:30,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:12:30,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:12:30,020 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand 8 states. [2020-11-29 20:12:30,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:30,180 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2020-11-29 20:12:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:12:30,186 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-11-29 20:12:30,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:30,188 INFO L225 Difference]: With dead ends: 120 [2020-11-29 20:12:30,188 INFO L226 Difference]: Without dead ends: 114 [2020-11-29 20:12:30,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:12:30,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-29 20:12:30,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 74. [2020-11-29 20:12:30,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-29 20:12:30,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-11-29 20:12:30,214 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 33 [2020-11-29 20:12:30,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:30,214 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-11-29 20:12:30,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:12:30,215 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-11-29 20:12:30,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 20:12:30,217 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:30,217 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:30,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:30,424 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:30,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:30,424 INFO L82 PathProgramCache]: Analyzing trace with hash -883385759, now seen corresponding path program 1 times [2020-11-29 20:12:30,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:30,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588555306] [2020-11-29 20:12:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 20:12:30,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588555306] [2020-11-29 20:12:30,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502051523] [2020-11-29 20:12:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:30,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 20:12:30,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 20:12:30,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:12:30,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-11-29 20:12:30,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516818159] [2020-11-29 20:12:30,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:12:30,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:30,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:12:30,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:12:30,664 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 7 states. [2020-11-29 20:12:30,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:30,854 INFO L93 Difference]: Finished difference Result 164 states and 223 transitions. [2020-11-29 20:12:30,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:12:30,857 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-11-29 20:12:30,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:30,859 INFO L225 Difference]: With dead ends: 164 [2020-11-29 20:12:30,860 INFO L226 Difference]: Without dead ends: 97 [2020-11-29 20:12:30,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:12:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-29 20:12:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-11-29 20:12:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-29 20:12:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2020-11-29 20:12:30,885 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 36 [2020-11-29 20:12:30,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:30,885 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2020-11-29 20:12:30,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:12:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2020-11-29 20:12:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-29 20:12:30,887 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:30,887 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:31,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:31,116 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:31,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:31,116 INFO L82 PathProgramCache]: Analyzing trace with hash 984846308, now seen corresponding path program 2 times [2020-11-29 20:12:31,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:31,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783391534] [2020-11-29 20:12:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:31,133 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:31,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944618345] [2020-11-29 20:12:31,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:31,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:12:31,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:31,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 20:12:31,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-29 20:12:31,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783391534] [2020-11-29 20:12:31,352 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:31,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944618345] [2020-11-29 20:12:31,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:31,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-29 20:12:31,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755879911] [2020-11-29 20:12:31,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:12:31,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:31,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:12:31,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:12:31,355 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 6 states. [2020-11-29 20:12:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:31,393 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2020-11-29 20:12:31,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:12:31,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-11-29 20:12:31,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:31,399 INFO L225 Difference]: With dead ends: 176 [2020-11-29 20:12:31,399 INFO L226 Difference]: Without dead ends: 94 [2020-11-29 20:12:31,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:12:31,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-29 20:12:31,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-11-29 20:12:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-29 20:12:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-11-29 20:12:31,417 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 47 [2020-11-29 20:12:31,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:31,417 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-11-29 20:12:31,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:12:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-11-29 20:12:31,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-29 20:12:31,421 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:31,422 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:31,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 20:12:31,628 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:31,628 INFO L82 PathProgramCache]: Analyzing trace with hash 999874210, now seen corresponding path program 3 times [2020-11-29 20:12:31,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:31,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652786103] [2020-11-29 20:12:31,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-29 20:12:31,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652786103] [2020-11-29 20:12:31,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:12:31,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:12:31,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934928851] [2020-11-29 20:12:31,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:12:31,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:31,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:12:31,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:12:31,694 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 4 states. [2020-11-29 20:12:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:31,825 INFO L93 Difference]: Finished difference Result 179 states and 234 transitions. [2020-11-29 20:12:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:12:31,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-11-29 20:12:31,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:31,828 INFO L225 Difference]: With dead ends: 179 [2020-11-29 20:12:31,828 INFO L226 Difference]: Without dead ends: 109 [2020-11-29 20:12:31,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:12:31,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-29 20:12:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2020-11-29 20:12:31,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-29 20:12:31,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-11-29 20:12:31,840 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 49 [2020-11-29 20:12:31,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:31,840 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-11-29 20:12:31,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:12:31,840 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-11-29 20:12:31,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-29 20:12:31,842 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:31,842 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:31,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 20:12:31,843 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:31,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:31,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1208175976, now seen corresponding path program 1 times [2020-11-29 20:12:31,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:31,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757565129] [2020-11-29 20:12:31,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:31,858 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:31,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506429012] [2020-11-29 20:12:31,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:31,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:12:31,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-29 20:12:32,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757565129] [2020-11-29 20:12:32,062 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:32,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506429012] [2020-11-29 20:12:32,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:32,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 20:12:32,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484752534] [2020-11-29 20:12:32,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:12:32,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:32,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:12:32,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:12:32,065 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 7 states. [2020-11-29 20:12:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:32,116 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2020-11-29 20:12:32,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:12:32,117 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-11-29 20:12:32,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:32,118 INFO L225 Difference]: With dead ends: 160 [2020-11-29 20:12:32,118 INFO L226 Difference]: Without dead ends: 87 [2020-11-29 20:12:32,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:12:32,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-29 20:12:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-11-29 20:12:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-29 20:12:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2020-11-29 20:12:32,138 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 55 [2020-11-29 20:12:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:32,138 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2020-11-29 20:12:32,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:12:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2020-11-29 20:12:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-29 20:12:32,139 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:32,140 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:32,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:32,363 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:32,364 INFO L82 PathProgramCache]: Analyzing trace with hash -394370218, now seen corresponding path program 2 times [2020-11-29 20:12:32,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:32,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556687933] [2020-11-29 20:12:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:32,391 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:32,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922085543] [2020-11-29 20:12:32,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:32,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:12:32,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:32,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:12:32,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-29 20:12:32,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556687933] [2020-11-29 20:12:32,615 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:32,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922085543] [2020-11-29 20:12:32,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:32,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 20:12:32,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520410159] [2020-11-29 20:12:32,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:12:32,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:32,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:12:32,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:12:32,617 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand 8 states. [2020-11-29 20:12:32,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:32,677 INFO L93 Difference]: Finished difference Result 162 states and 194 transitions. [2020-11-29 20:12:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:12:32,678 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-11-29 20:12:32,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:32,679 INFO L225 Difference]: With dead ends: 162 [2020-11-29 20:12:32,679 INFO L226 Difference]: Without dead ends: 89 [2020-11-29 20:12:32,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:12:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-29 20:12:32,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-11-29 20:12:32,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-29 20:12:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2020-11-29 20:12:32,688 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 57 [2020-11-29 20:12:32,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:32,688 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2020-11-29 20:12:32,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:12:32,688 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2020-11-29 20:12:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-29 20:12:32,690 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:32,690 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:32,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:32,915 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:32,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:32,916 INFO L82 PathProgramCache]: Analyzing trace with hash -11084652, now seen corresponding path program 3 times [2020-11-29 20:12:32,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:32,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501425306] [2020-11-29 20:12:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:32,937 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:32,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568093158] [2020-11-29 20:12:32,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:33,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 20:12:33,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:33,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 20:12:33,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-11-29 20:12:33,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501425306] [2020-11-29 20:12:33,199 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:33,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568093158] [2020-11-29 20:12:33,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:12:33,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:12:33,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116072095] [2020-11-29 20:12:33,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:12:33,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:33,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:12:33,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:12:33,211 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 4 states. [2020-11-29 20:12:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:33,261 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-11-29 20:12:33,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:12:33,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-11-29 20:12:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:33,263 INFO L225 Difference]: With dead ends: 118 [2020-11-29 20:12:33,263 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 20:12:33,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:12:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 20:12:33,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2020-11-29 20:12:33,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 20:12:33,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-11-29 20:12:33,279 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 59 [2020-11-29 20:12:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:33,281 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-11-29 20:12:33,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:12:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-11-29 20:12:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-29 20:12:33,283 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:33,283 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:33,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 20:12:33,484 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:33,484 INFO L82 PathProgramCache]: Analyzing trace with hash -433786478, now seen corresponding path program 1 times [2020-11-29 20:12:33,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:33,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332024851] [2020-11-29 20:12:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:33,495 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:33,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703849365] [2020-11-29 20:12:33,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:33,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:12:33,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-29 20:12:33,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332024851] [2020-11-29 20:12:33,689 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:33,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703849365] [2020-11-29 20:12:33,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:33,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 20:12:33,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958923506] [2020-11-29 20:12:33,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:12:33,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:33,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:12:33,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:12:33,692 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 9 states. [2020-11-29 20:12:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:33,736 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-11-29 20:12:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 20:12:33,737 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-11-29 20:12:33,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:33,738 INFO L225 Difference]: With dead ends: 108 [2020-11-29 20:12:33,738 INFO L226 Difference]: Without dead ends: 63 [2020-11-29 20:12:33,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:12:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-29 20:12:33,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-11-29 20:12:33,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-29 20:12:33,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-11-29 20:12:33,744 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 59 [2020-11-29 20:12:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:33,744 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-11-29 20:12:33,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:12:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-11-29 20:12:33,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-29 20:12:33,745 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:33,746 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:33,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 20:12:33,971 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:33,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:33,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1463545008, now seen corresponding path program 2 times [2020-11-29 20:12:33,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:33,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580475588] [2020-11-29 20:12:33,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:33,985 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:33,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868190957] [2020-11-29 20:12:33,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:34,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:12:34,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 20:12:34,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-29 20:12:34,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580475588] [2020-11-29 20:12:34,243 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:34,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868190957] [2020-11-29 20:12:34,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:34,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-29 20:12:34,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072998030] [2020-11-29 20:12:34,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 20:12:34,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:34,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 20:12:34,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:12:34,246 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 10 states. [2020-11-29 20:12:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:34,313 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-11-29 20:12:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 20:12:34,314 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-11-29 20:12:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:34,315 INFO L225 Difference]: With dead ends: 110 [2020-11-29 20:12:34,315 INFO L226 Difference]: Without dead ends: 65 [2020-11-29 20:12:34,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:12:34,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-29 20:12:34,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-11-29 20:12:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 20:12:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-11-29 20:12:34,320 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 61 [2020-11-29 20:12:34,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:34,321 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-11-29 20:12:34,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 20:12:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-11-29 20:12:34,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-29 20:12:34,322 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:34,322 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:34,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 20:12:34,539 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:34,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:34,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1075953038, now seen corresponding path program 3 times [2020-11-29 20:12:34,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:34,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733968838] [2020-11-29 20:12:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:34,566 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:34,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749066828] [2020-11-29 20:12:34,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:34,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 20:12:34,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:34,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 20:12:34,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-29 20:12:34,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733968838] [2020-11-29 20:12:34,768 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:34,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749066828] [2020-11-29 20:12:34,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:34,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-29 20:12:34,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040146386] [2020-11-29 20:12:34,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:12:34,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:34,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:12:34,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:12:34,770 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 4 states. [2020-11-29 20:12:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:34,809 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-11-29 20:12:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:12:34,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-11-29 20:12:34,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:34,810 INFO L225 Difference]: With dead ends: 84 [2020-11-29 20:12:34,810 INFO L226 Difference]: Without dead ends: 67 [2020-11-29 20:12:34,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:12:34,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-29 20:12:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-11-29 20:12:34,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-29 20:12:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-11-29 20:12:34,815 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 63 [2020-11-29 20:12:34,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:34,815 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-11-29 20:12:34,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:12:34,816 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-11-29 20:12:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-29 20:12:34,816 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:34,816 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:35,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:35,039 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:35,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:35,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1189377332, now seen corresponding path program 4 times [2020-11-29 20:12:35,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:35,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610440957] [2020-11-29 20:12:35,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:35,054 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:35,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095957000] [2020-11-29 20:12:35,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:35,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:12:35,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:35,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 20:12:35,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-11-29 20:12:35,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610440957] [2020-11-29 20:12:35,178 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:35,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095957000] [2020-11-29 20:12:35,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:35,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 20:12:35,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202271981] [2020-11-29 20:12:35,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:12:35,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:35,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:12:35,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:12:35,180 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 5 states. [2020-11-29 20:12:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:35,269 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2020-11-29 20:12:35,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:12:35,269 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-11-29 20:12:35,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:35,270 INFO L225 Difference]: With dead ends: 119 [2020-11-29 20:12:35,270 INFO L226 Difference]: Without dead ends: 78 [2020-11-29 20:12:35,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:12:35,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-29 20:12:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-11-29 20:12:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-29 20:12:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2020-11-29 20:12:35,277 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 65 [2020-11-29 20:12:35,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:35,277 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2020-11-29 20:12:35,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:12:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2020-11-29 20:12:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-29 20:12:35,278 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:35,279 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:35,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 20:12:35,494 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:35,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:35,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1276239541, now seen corresponding path program 5 times [2020-11-29 20:12:35,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:35,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497340546] [2020-11-29 20:12:35,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:35,505 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:35,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671029648] [2020-11-29 20:12:35,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:35,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-29 20:12:35,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:35,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 20:12:35,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-11-29 20:12:35,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497340546] [2020-11-29 20:12:35,741 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:35,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671029648] [2020-11-29 20:12:35,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:35,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-29 20:12:35,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576823945] [2020-11-29 20:12:35,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:12:35,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:35,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:12:35,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:12:35,744 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 6 states. [2020-11-29 20:12:35,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:35,859 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2020-11-29 20:12:35,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:12:35,860 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-11-29 20:12:35,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:35,861 INFO L225 Difference]: With dead ends: 134 [2020-11-29 20:12:35,861 INFO L226 Difference]: Without dead ends: 87 [2020-11-29 20:12:35,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:12:35,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-29 20:12:35,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2020-11-29 20:12:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-29 20:12:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2020-11-29 20:12:35,866 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 74 [2020-11-29 20:12:35,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:35,867 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2020-11-29 20:12:35,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:12:35,870 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2020-11-29 20:12:35,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-29 20:12:35,872 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:35,872 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:36,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 20:12:36,083 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:36,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:36,084 INFO L82 PathProgramCache]: Analyzing trace with hash 330377580, now seen corresponding path program 6 times [2020-11-29 20:12:36,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:36,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383140909] [2020-11-29 20:12:36,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:36,104 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:36,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950105317] [2020-11-29 20:12:36,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:36,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-29 20:12:36,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:36,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 20:12:36,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-11-29 20:12:36,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383140909] [2020-11-29 20:12:36,400 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:36,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950105317] [2020-11-29 20:12:36,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:36,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 20:12:36,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153042684] [2020-11-29 20:12:36,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:12:36,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:36,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:12:36,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:12:36,404 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 5 states. [2020-11-29 20:12:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:36,446 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2020-11-29 20:12:36,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:12:36,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-11-29 20:12:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:36,448 INFO L225 Difference]: With dead ends: 110 [2020-11-29 20:12:36,449 INFO L226 Difference]: Without dead ends: 87 [2020-11-29 20:12:36,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:12:36,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-29 20:12:36,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-11-29 20:12:36,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-29 20:12:36,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2020-11-29 20:12:36,456 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 83 [2020-11-29 20:12:36,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:36,456 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2020-11-29 20:12:36,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:12:36,457 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2020-11-29 20:12:36,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-29 20:12:36,458 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:36,458 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:36,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:36,659 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:36,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:36,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1018548394, now seen corresponding path program 7 times [2020-11-29 20:12:36,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:36,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931674260] [2020-11-29 20:12:36,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:36,679 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:36,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110343345] [2020-11-29 20:12:36,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:36,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 20:12:36,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-11-29 20:12:36,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931674260] [2020-11-29 20:12:36,956 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:36,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110343345] [2020-11-29 20:12:36,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:36,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-29 20:12:36,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357574705] [2020-11-29 20:12:36,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 20:12:36,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:36,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 20:12:36,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:12:36,959 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 11 states. [2020-11-29 20:12:37,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:37,032 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2020-11-29 20:12:37,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:12:37,033 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-11-29 20:12:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:37,034 INFO L225 Difference]: With dead ends: 156 [2020-11-29 20:12:37,034 INFO L226 Difference]: Without dead ends: 89 [2020-11-29 20:12:37,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:12:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-29 20:12:37,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-11-29 20:12:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-29 20:12:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-11-29 20:12:37,041 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 85 [2020-11-29 20:12:37,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:37,042 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-11-29 20:12:37,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 20:12:37,042 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-11-29 20:12:37,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-29 20:12:37,043 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:37,043 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:37,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:37,259 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:37,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:37,260 INFO L82 PathProgramCache]: Analyzing trace with hash -471326488, now seen corresponding path program 8 times [2020-11-29 20:12:37,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:37,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868970513] [2020-11-29 20:12:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:37,297 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:37,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132011695] [2020-11-29 20:12:37,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/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 [2020-11-29 20:12:37,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:12:37,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:37,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 20:12:37,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-11-29 20:12:37,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868970513] [2020-11-29 20:12:37,579 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:37,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132011695] [2020-11-29 20:12:37,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:37,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-29 20:12:37,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936465685] [2020-11-29 20:12:37,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 20:12:37,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:37,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 20:12:37,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:12:37,582 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 12 states. [2020-11-29 20:12:37,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:37,678 INFO L93 Difference]: Finished difference Result 158 states and 172 transitions. [2020-11-29 20:12:37,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 20:12:37,679 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-11-29 20:12:37,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:37,680 INFO L225 Difference]: With dead ends: 158 [2020-11-29 20:12:37,681 INFO L226 Difference]: Without dead ends: 91 [2020-11-29 20:12:37,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:12:37,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-29 20:12:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-11-29 20:12:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-29 20:12:37,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-11-29 20:12:37,688 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 87 [2020-11-29 20:12:37,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:37,689 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-11-29 20:12:37,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 20:12:37,689 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-11-29 20:12:37,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-29 20:12:37,690 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:37,691 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:37,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:37,907 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:37,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:37,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2016978522, now seen corresponding path program 9 times [2020-11-29 20:12:37,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:37,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755774996] [2020-11-29 20:12:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:37,924 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:37,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771890925] [2020-11-29 20:12:37,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:38,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 20:12:38,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:38,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:12:38,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-11-29 20:12:38,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755774996] [2020-11-29 20:12:38,298 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:38,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771890925] [2020-11-29 20:12:38,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:38,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 20:12:38,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767090694] [2020-11-29 20:12:38,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:12:38,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:38,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:12:38,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:12:38,303 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 5 states. [2020-11-29 20:12:38,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:38,406 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2020-11-29 20:12:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:12:38,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-11-29 20:12:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:38,411 INFO L225 Difference]: With dead ends: 155 [2020-11-29 20:12:38,411 INFO L226 Difference]: Without dead ends: 105 [2020-11-29 20:12:38,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:12:38,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-11-29 20:12:38,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-11-29 20:12:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-29 20:12:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-11-29 20:12:38,417 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 89 [2020-11-29 20:12:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:38,417 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-11-29 20:12:38,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:12:38,417 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-11-29 20:12:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-29 20:12:38,418 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:38,419 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:38,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-29 20:12:38,630 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:38,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:38,630 INFO L82 PathProgramCache]: Analyzing trace with hash -751149159, now seen corresponding path program 10 times [2020-11-29 20:12:38,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:38,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826890999] [2020-11-29 20:12:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:38,649 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:38,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828855629] [2020-11-29 20:12:38,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:38,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:12:38,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:38,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:12:38,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-11-29 20:12:38,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826890999] [2020-11-29 20:12:38,823 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:38,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828855629] [2020-11-29 20:12:38,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:38,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 20:12:38,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658378117] [2020-11-29 20:12:38,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:12:38,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:38,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:12:38,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:12:38,826 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 7 states. [2020-11-29 20:12:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:39,002 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2020-11-29 20:12:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:12:39,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-11-29 20:12:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:39,004 INFO L225 Difference]: With dead ends: 175 [2020-11-29 20:12:39,004 INFO L226 Difference]: Without dead ends: 111 [2020-11-29 20:12:39,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:12:39,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-29 20:12:39,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-11-29 20:12:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-29 20:12:39,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-11-29 20:12:39,011 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 98 [2020-11-29 20:12:39,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:39,011 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-11-29 20:12:39,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:12:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-11-29 20:12:39,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-29 20:12:39,012 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:39,013 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:39,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-29 20:12:39,213 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:39,214 INFO L82 PathProgramCache]: Analyzing trace with hash -415195072, now seen corresponding path program 11 times [2020-11-29 20:12:39,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:39,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552539449] [2020-11-29 20:12:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:39,233 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:39,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717591790] [2020-11-29 20:12:39,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:39,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-29 20:12:39,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:39,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:12:39,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-11-29 20:12:39,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552539449] [2020-11-29 20:12:39,536 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:39,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717591790] [2020-11-29 20:12:39,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:39,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 20:12:39,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76278613] [2020-11-29 20:12:39,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:12:39,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:39,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:12:39,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:12:39,538 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 8 states. [2020-11-29 20:12:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:39,698 INFO L93 Difference]: Finished difference Result 190 states and 212 transitions. [2020-11-29 20:12:39,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:12:39,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 107 [2020-11-29 20:12:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:39,699 INFO L225 Difference]: With dead ends: 190 [2020-11-29 20:12:39,699 INFO L226 Difference]: Without dead ends: 120 [2020-11-29 20:12:39,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:12:39,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-29 20:12:39,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-11-29 20:12:39,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-11-29 20:12:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2020-11-29 20:12:39,707 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 107 [2020-11-29 20:12:39,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:39,707 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2020-11-29 20:12:39,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:12:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2020-11-29 20:12:39,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-29 20:12:39,708 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:39,709 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:39,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:39,932 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:39,932 INFO L82 PathProgramCache]: Analyzing trace with hash -240955271, now seen corresponding path program 12 times [2020-11-29 20:12:39,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:39,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393714018] [2020-11-29 20:12:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:39,942 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:39,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709749700] [2020-11-29 20:12:39,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:40,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-29 20:12:40,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:40,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 20:12:40,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-11-29 20:12:40,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393714018] [2020-11-29 20:12:40,692 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:40,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709749700] [2020-11-29 20:12:40,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:40,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-29 20:12:40,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378678270] [2020-11-29 20:12:40,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:12:40,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:40,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:12:40,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:12:40,695 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand 6 states. [2020-11-29 20:12:40,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:40,727 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2020-11-29 20:12:40,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:12:40,728 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2020-11-29 20:12:40,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:40,729 INFO L225 Difference]: With dead ends: 152 [2020-11-29 20:12:40,729 INFO L226 Difference]: Without dead ends: 120 [2020-11-29 20:12:40,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:12:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-29 20:12:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-11-29 20:12:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-29 20:12:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2020-11-29 20:12:40,738 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 116 [2020-11-29 20:12:40,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:40,739 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2020-11-29 20:12:40,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:12:40,739 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2020-11-29 20:12:40,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-11-29 20:12:40,740 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:40,741 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:40,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-29 20:12:40,967 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:40,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:40,968 INFO L82 PathProgramCache]: Analyzing trace with hash 828658235, now seen corresponding path program 13 times [2020-11-29 20:12:40,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:40,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415047150] [2020-11-29 20:12:40,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:40,981 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:40,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627199504] [2020-11-29 20:12:40,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:41,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:12:41,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-11-29 20:12:41,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415047150] [2020-11-29 20:12:41,329 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:41,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627199504] [2020-11-29 20:12:41,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:41,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 20:12:41,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005496490] [2020-11-29 20:12:41,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 20:12:41,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:41,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 20:12:41,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:12:41,332 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand 13 states. [2020-11-29 20:12:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:41,399 INFO L93 Difference]: Finished difference Result 218 states and 238 transitions. [2020-11-29 20:12:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:12:41,400 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 118 [2020-11-29 20:12:41,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:41,401 INFO L225 Difference]: With dead ends: 218 [2020-11-29 20:12:41,401 INFO L226 Difference]: Without dead ends: 122 [2020-11-29 20:12:41,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:12:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-29 20:12:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-11-29 20:12:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-11-29 20:12:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2020-11-29 20:12:41,409 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 118 [2020-11-29 20:12:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:41,409 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2020-11-29 20:12:41,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 20:12:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2020-11-29 20:12:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-11-29 20:12:41,411 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:41,411 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:41,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:41,631 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:41,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1936556477, now seen corresponding path program 14 times [2020-11-29 20:12:41,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:41,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368215653] [2020-11-29 20:12:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:41,654 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:41,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647300276] [2020-11-29 20:12:41,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:41,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:12:41,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:41,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 20:12:41,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-11-29 20:12:41,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368215653] [2020-11-29 20:12:41,957 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:41,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647300276] [2020-11-29 20:12:41,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:41,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-29 20:12:41,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369139964] [2020-11-29 20:12:41,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 20:12:41,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:41,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 20:12:41,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:12:41,959 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 14 states. [2020-11-29 20:12:42,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:42,014 INFO L93 Difference]: Finished difference Result 220 states and 240 transitions. [2020-11-29 20:12:42,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 20:12:42,015 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 120 [2020-11-29 20:12:42,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:42,016 INFO L225 Difference]: With dead ends: 220 [2020-11-29 20:12:42,017 INFO L226 Difference]: Without dead ends: 124 [2020-11-29 20:12:42,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:12:42,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-29 20:12:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-11-29 20:12:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-11-29 20:12:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2020-11-29 20:12:42,024 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 120 [2020-11-29 20:12:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:42,024 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2020-11-29 20:12:42,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 20:12:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2020-11-29 20:12:42,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-11-29 20:12:42,025 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:42,026 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:42,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-29 20:12:42,239 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:42,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:42,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1474877631, now seen corresponding path program 15 times [2020-11-29 20:12:42,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:42,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786570946] [2020-11-29 20:12:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:42,253 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:42,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243108424] [2020-11-29 20:12:42,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:43,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-29 20:12:43,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:43,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 20:12:43,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-11-29 20:12:43,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786570946] [2020-11-29 20:12:43,357 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:43,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243108424] [2020-11-29 20:12:43,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:43,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-29 20:12:43,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415715879] [2020-11-29 20:12:43,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:12:43,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:43,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:12:43,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:12:43,360 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand 6 states. [2020-11-29 20:12:43,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:43,506 INFO L93 Difference]: Finished difference Result 208 states and 233 transitions. [2020-11-29 20:12:43,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:12:43,506 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2020-11-29 20:12:43,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:43,508 INFO L225 Difference]: With dead ends: 208 [2020-11-29 20:12:43,508 INFO L226 Difference]: Without dead ends: 138 [2020-11-29 20:12:43,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:12:43,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-29 20:12:43,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2020-11-29 20:12:43,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-29 20:12:43,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 145 transitions. [2020-11-29 20:12:43,515 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 145 transitions. Word has length 122 [2020-11-29 20:12:43,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:43,516 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 145 transitions. [2020-11-29 20:12:43,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:12:43,516 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 145 transitions. [2020-11-29 20:12:43,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-29 20:12:43,517 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:43,517 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 9, 9, 9, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:43,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-29 20:12:43,718 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:43,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:43,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1028115296, now seen corresponding path program 16 times [2020-11-29 20:12:43,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:43,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320713053] [2020-11-29 20:12:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:43,732 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:43,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428947852] [2020-11-29 20:12:43,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:43,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:12:43,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:43,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:12:43,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 53 proven. 57 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-11-29 20:12:43,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320713053] [2020-11-29 20:12:43,892 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:43,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428947852] [2020-11-29 20:12:43,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:43,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 20:12:43,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682094246] [2020-11-29 20:12:43,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:12:43,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:43,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:12:43,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:12:43,894 INFO L87 Difference]: Start difference. First operand 132 states and 145 transitions. Second operand 9 states. [2020-11-29 20:12:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:44,083 INFO L93 Difference]: Finished difference Result 231 states and 259 transitions. [2020-11-29 20:12:44,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 20:12:44,084 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-11-29 20:12:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:44,085 INFO L225 Difference]: With dead ends: 231 [2020-11-29 20:12:44,085 INFO L226 Difference]: Without dead ends: 144 [2020-11-29 20:12:44,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:12:44,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-11-29 20:12:44,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2020-11-29 20:12:44,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-11-29 20:12:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 154 transitions. [2020-11-29 20:12:44,093 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 154 transitions. Word has length 131 [2020-11-29 20:12:44,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:44,094 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 154 transitions. [2020-11-29 20:12:44,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:12:44,094 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 154 transitions. [2020-11-29 20:12:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-11-29 20:12:44,095 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:44,095 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 10, 10, 10, 10, 7, 7, 7, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:44,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-29 20:12:44,311 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:44,312 INFO L82 PathProgramCache]: Analyzing trace with hash 10468257, now seen corresponding path program 17 times [2020-11-29 20:12:44,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:44,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293831876] [2020-11-29 20:12:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:44,332 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:44,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061054374] [2020-11-29 20:12:44,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:44,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-29 20:12:44,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:44,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 20:12:44,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 61 proven. 77 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2020-11-29 20:12:45,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293831876] [2020-11-29 20:12:45,031 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:45,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061054374] [2020-11-29 20:12:45,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:45,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-29 20:12:45,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383586770] [2020-11-29 20:12:45,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 20:12:45,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:45,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 20:12:45,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:12:45,033 INFO L87 Difference]: Start difference. First operand 141 states and 154 transitions. Second operand 10 states. [2020-11-29 20:12:45,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:45,218 INFO L93 Difference]: Finished difference Result 246 states and 274 transitions. [2020-11-29 20:12:45,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 20:12:45,219 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2020-11-29 20:12:45,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:45,220 INFO L225 Difference]: With dead ends: 246 [2020-11-29 20:12:45,220 INFO L226 Difference]: Without dead ends: 153 [2020-11-29 20:12:45,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:12:45,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-29 20:12:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2020-11-29 20:12:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-11-29 20:12:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 163 transitions. [2020-11-29 20:12:45,228 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 163 transitions. Word has length 140 [2020-11-29 20:12:45,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:45,229 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 163 transitions. [2020-11-29 20:12:45,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 20:12:45,229 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 163 transitions. [2020-11-29 20:12:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-11-29 20:12:45,230 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:45,230 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 8, 8, 8, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:45,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:45,431 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:45,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:45,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1509398272, now seen corresponding path program 18 times [2020-11-29 20:12:45,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:45,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003142412] [2020-11-29 20:12:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:45,446 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:45,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341930617] [2020-11-29 20:12:45,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:46,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-29 20:12:46,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:46,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:12:46,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-11-29 20:12:46,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003142412] [2020-11-29 20:12:46,358 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:46,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341930617] [2020-11-29 20:12:46,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:46,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 20:12:46,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216488369] [2020-11-29 20:12:46,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:12:46,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:46,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:12:46,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:12:46,360 INFO L87 Difference]: Start difference. First operand 150 states and 163 transitions. Second operand 7 states. [2020-11-29 20:12:46,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:46,392 INFO L93 Difference]: Finished difference Result 194 states and 211 transitions. [2020-11-29 20:12:46,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:12:46,392 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 149 [2020-11-29 20:12:46,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:46,394 INFO L225 Difference]: With dead ends: 194 [2020-11-29 20:12:46,394 INFO L226 Difference]: Without dead ends: 153 [2020-11-29 20:12:46,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:12:46,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-29 20:12:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-11-29 20:12:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-29 20:12:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2020-11-29 20:12:46,402 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 149 [2020-11-29 20:12:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:46,403 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2020-11-29 20:12:46,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:12:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2020-11-29 20:12:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-11-29 20:12:46,404 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:46,404 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:46,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-29 20:12:46,620 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:46,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:46,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1693956674, now seen corresponding path program 19 times [2020-11-29 20:12:46,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:46,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282876301] [2020-11-29 20:12:46,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:46,634 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:46,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739968431] [2020-11-29 20:12:46,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:46,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 20:12:46,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2020-11-29 20:12:46,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282876301] [2020-11-29 20:12:46,972 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:46,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739968431] [2020-11-29 20:12:46,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:46,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-11-29 20:12:46,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643627620] [2020-11-29 20:12:46,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 20:12:46,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:46,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 20:12:46,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-29 20:12:46,975 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand 15 states. [2020-11-29 20:12:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:47,030 INFO L93 Difference]: Finished difference Result 280 states and 306 transitions. [2020-11-29 20:12:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 20:12:47,036 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 151 [2020-11-29 20:12:47,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:47,037 INFO L225 Difference]: With dead ends: 280 [2020-11-29 20:12:47,037 INFO L226 Difference]: Without dead ends: 155 [2020-11-29 20:12:47,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-29 20:12:47,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-29 20:12:47,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-11-29 20:12:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-11-29 20:12:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 167 transitions. [2020-11-29 20:12:47,046 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 167 transitions. Word has length 151 [2020-11-29 20:12:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:47,047 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 167 transitions. [2020-11-29 20:12:47,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 20:12:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 167 transitions. [2020-11-29 20:12:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-11-29 20:12:47,048 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:47,049 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:47,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:47,275 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:47,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:47,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1564642940, now seen corresponding path program 20 times [2020-11-29 20:12:47,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:47,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446940197] [2020-11-29 20:12:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:47,286 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:47,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216730877] [2020-11-29 20:12:47,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:47,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:12:47,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:47,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 20:12:47,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2020-11-29 20:12:47,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446940197] [2020-11-29 20:12:47,731 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:47,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216730877] [2020-11-29 20:12:47,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:47,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-29 20:12:47,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844473724] [2020-11-29 20:12:47,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 20:12:47,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:47,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 20:12:47,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:12:47,734 INFO L87 Difference]: Start difference. First operand 154 states and 167 transitions. Second operand 16 states. [2020-11-29 20:12:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:47,813 INFO L93 Difference]: Finished difference Result 282 states and 308 transitions. [2020-11-29 20:12:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 20:12:47,814 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 153 [2020-11-29 20:12:47,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:47,816 INFO L225 Difference]: With dead ends: 282 [2020-11-29 20:12:47,817 INFO L226 Difference]: Without dead ends: 157 [2020-11-29 20:12:47,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:12:47,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-11-29 20:12:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-11-29 20:12:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-11-29 20:12:47,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 169 transitions. [2020-11-29 20:12:47,827 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 169 transitions. Word has length 153 [2020-11-29 20:12:47,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:47,828 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 169 transitions. [2020-11-29 20:12:47,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 20:12:47,828 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 169 transitions. [2020-11-29 20:12:47,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-29 20:12:47,829 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:47,829 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:48,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-29 20:12:48,052 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:48,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2047713210, now seen corresponding path program 21 times [2020-11-29 20:12:48,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:48,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893153977] [2020-11-29 20:12:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:48,063 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:48,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860074953] [2020-11-29 20:12:48,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:48,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-29 20:12:48,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:48,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:12:48,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2020-11-29 20:12:49,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893153977] [2020-11-29 20:12:49,117 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:49,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860074953] [2020-11-29 20:12:49,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:49,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 20:12:49,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572489397] [2020-11-29 20:12:49,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:12:49,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:49,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:12:49,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:12:49,120 INFO L87 Difference]: Start difference. First operand 156 states and 169 transitions. Second operand 8 states. [2020-11-29 20:12:49,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:49,149 INFO L93 Difference]: Finished difference Result 200 states and 217 transitions. [2020-11-29 20:12:49,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:12:49,150 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 155 [2020-11-29 20:12:49,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:49,151 INFO L225 Difference]: With dead ends: 200 [2020-11-29 20:12:49,151 INFO L226 Difference]: Without dead ends: 159 [2020-11-29 20:12:49,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:12:49,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-29 20:12:49,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-11-29 20:12:49,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-29 20:12:49,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 171 transitions. [2020-11-29 20:12:49,159 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 171 transitions. Word has length 155 [2020-11-29 20:12:49,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:49,159 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 171 transitions. [2020-11-29 20:12:49,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:12:49,160 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 171 transitions. [2020-11-29 20:12:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-29 20:12:49,161 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:49,161 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 11, 11, 11, 11, 11, 11, 8, 8, 8, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:49,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-29 20:12:49,362 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:49,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:49,362 INFO L82 PathProgramCache]: Analyzing trace with hash 230623224, now seen corresponding path program 22 times [2020-11-29 20:12:49,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:49,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121373864] [2020-11-29 20:12:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:49,376 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:49,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229066604] [2020-11-29 20:12:49,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:49,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:12:49,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:49,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 20:12:49,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2020-11-29 20:12:49,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121373864] [2020-11-29 20:12:49,607 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:49,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229066604] [2020-11-29 20:12:49,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:49,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-29 20:12:49,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122967032] [2020-11-29 20:12:49,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 20:12:49,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:49,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 20:12:49,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:12:49,612 INFO L87 Difference]: Start difference. First operand 158 states and 171 transitions. Second operand 11 states. [2020-11-29 20:12:49,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:49,811 INFO L93 Difference]: Finished difference Result 273 states and 301 transitions. [2020-11-29 20:12:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:12:49,812 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 157 [2020-11-29 20:12:49,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:49,813 INFO L225 Difference]: With dead ends: 273 [2020-11-29 20:12:49,813 INFO L226 Difference]: Without dead ends: 170 [2020-11-29 20:12:49,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:12:49,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-11-29 20:12:49,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-11-29 20:12:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-11-29 20:12:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 180 transitions. [2020-11-29 20:12:49,821 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 180 transitions. Word has length 157 [2020-11-29 20:12:49,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:49,821 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 180 transitions. [2020-11-29 20:12:49,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 20:12:49,822 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 180 transitions. [2020-11-29 20:12:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-11-29 20:12:49,822 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:49,823 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 12, 12, 9, 9, 9, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:50,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-29 20:12:50,047 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:50,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:50,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1626319625, now seen corresponding path program 23 times [2020-11-29 20:12:50,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:50,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123957820] [2020-11-29 20:12:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:50,063 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:50,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434851754] [2020-11-29 20:12:50,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:51,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-11-29 20:12:51,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:51,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 20:12:51,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 77 proven. 126 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-11-29 20:12:51,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123957820] [2020-11-29 20:12:51,351 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:51,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434851754] [2020-11-29 20:12:51,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:51,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-29 20:12:51,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464441365] [2020-11-29 20:12:51,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 20:12:51,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:51,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 20:12:51,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:12:51,354 INFO L87 Difference]: Start difference. First operand 167 states and 180 transitions. Second operand 12 states. [2020-11-29 20:12:51,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:51,594 INFO L93 Difference]: Finished difference Result 288 states and 316 transitions. [2020-11-29 20:12:51,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 20:12:51,594 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 166 [2020-11-29 20:12:51,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:51,596 INFO L225 Difference]: With dead ends: 288 [2020-11-29 20:12:51,596 INFO L226 Difference]: Without dead ends: 179 [2020-11-29 20:12:51,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:12:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-29 20:12:51,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2020-11-29 20:12:51,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-11-29 20:12:51,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 189 transitions. [2020-11-29 20:12:51,607 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 189 transitions. Word has length 166 [2020-11-29 20:12:51,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:51,607 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 189 transitions. [2020-11-29 20:12:51,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 20:12:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 189 transitions. [2020-11-29 20:12:51,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-29 20:12:51,609 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:51,609 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 10, 10, 10, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:51,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-29 20:12:51,827 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:51,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1265965160, now seen corresponding path program 24 times [2020-11-29 20:12:51,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:51,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367602249] [2020-11-29 20:12:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:51,846 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:51,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114444726] [2020-11-29 20:12:51,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:54,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-29 20:12:54,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:54,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 20:12:54,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 170 proven. 15 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-11-29 20:12:54,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367602249] [2020-11-29 20:12:54,189 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:54,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114444726] [2020-11-29 20:12:54,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:54,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-29 20:12:54,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575461719] [2020-11-29 20:12:54,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 20:12:54,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:54,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 20:12:54,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:12:54,193 INFO L87 Difference]: Start difference. First operand 176 states and 189 transitions. Second operand 11 states. [2020-11-29 20:12:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:54,524 INFO L93 Difference]: Finished difference Result 298 states and 331 transitions. [2020-11-29 20:12:54,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:12:54,525 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 175 [2020-11-29 20:12:54,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:54,526 INFO L225 Difference]: With dead ends: 298 [2020-11-29 20:12:54,526 INFO L226 Difference]: Without dead ends: 194 [2020-11-29 20:12:54,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:12:54,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-29 20:12:54,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2020-11-29 20:12:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-29 20:12:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 213 transitions. [2020-11-29 20:12:54,538 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 213 transitions. Word has length 175 [2020-11-29 20:12:54,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:54,538 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 213 transitions. [2020-11-29 20:12:54,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 20:12:54,539 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 213 transitions. [2020-11-29 20:12:54,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-11-29 20:12:54,540 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:54,540 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 10, 10, 10, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:54,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-29 20:12:54,755 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:54,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:54,756 INFO L82 PathProgramCache]: Analyzing trace with hash 394265848, now seen corresponding path program 25 times [2020-11-29 20:12:54,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:54,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591476757] [2020-11-29 20:12:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:54,775 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:54,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131794546] [2020-11-29 20:12:54,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:12:54,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 20:12:54,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2020-11-29 20:12:55,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591476757] [2020-11-29 20:12:55,229 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:55,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131794546] [2020-11-29 20:12:55,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:55,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-11-29 20:12:55,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556760518] [2020-11-29 20:12:55,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 20:12:55,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:55,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 20:12:55,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-29 20:12:55,232 INFO L87 Difference]: Start difference. First operand 194 states and 213 transitions. Second operand 17 states. [2020-11-29 20:12:55,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:55,310 INFO L93 Difference]: Finished difference Result 360 states and 398 transitions. [2020-11-29 20:12:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 20:12:55,311 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 193 [2020-11-29 20:12:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:55,313 INFO L225 Difference]: With dead ends: 360 [2020-11-29 20:12:55,313 INFO L226 Difference]: Without dead ends: 197 [2020-11-29 20:12:55,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-29 20:12:55,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-11-29 20:12:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2020-11-29 20:12:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-11-29 20:12:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 215 transitions. [2020-11-29 20:12:55,324 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 215 transitions. Word has length 193 [2020-11-29 20:12:55,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:55,325 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 215 transitions. [2020-11-29 20:12:55,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 20:12:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 215 transitions. [2020-11-29 20:12:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-11-29 20:12:55,326 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:55,327 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 10, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:55,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-29 20:12:55,555 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:55,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:55,556 INFO L82 PathProgramCache]: Analyzing trace with hash -17792970, now seen corresponding path program 26 times [2020-11-29 20:12:55,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:55,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833901345] [2020-11-29 20:12:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:55,570 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:55,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075977910] [2020-11-29 20:12:55,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:55,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:12:55,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:55,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 20:12:55,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2020-11-29 20:12:56,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833901345] [2020-11-29 20:12:56,065 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:56,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075977910] [2020-11-29 20:12:56,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:56,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-29 20:12:56,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329184348] [2020-11-29 20:12:56,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 20:12:56,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:56,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 20:12:56,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:12:56,067 INFO L87 Difference]: Start difference. First operand 196 states and 215 transitions. Second operand 18 states. [2020-11-29 20:12:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:56,157 INFO L93 Difference]: Finished difference Result 362 states and 400 transitions. [2020-11-29 20:12:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 20:12:56,158 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 195 [2020-11-29 20:12:56,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:56,160 INFO L225 Difference]: With dead ends: 362 [2020-11-29 20:12:56,160 INFO L226 Difference]: Without dead ends: 199 [2020-11-29 20:12:56,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:12:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-29 20:12:56,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2020-11-29 20:12:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-11-29 20:12:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 217 transitions. [2020-11-29 20:12:56,171 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 217 transitions. Word has length 195 [2020-11-29 20:12:56,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:56,172 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 217 transitions. [2020-11-29 20:12:56,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 20:12:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 217 transitions. [2020-11-29 20:12:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-11-29 20:12:56,174 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:56,174 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 10, 10, 10, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:56,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-29 20:12:56,387 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:56,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:56,388 INFO L82 PathProgramCache]: Analyzing trace with hash -869325836, now seen corresponding path program 27 times [2020-11-29 20:12:56,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:56,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716524817] [2020-11-29 20:12:56,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:56,404 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:56,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012031741] [2020-11-29 20:12:56,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:57,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-29 20:12:57,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:57,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:12:57,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1246 trivial. 0 not checked. [2020-11-29 20:12:57,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716524817] [2020-11-29 20:12:57,220 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:57,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012031741] [2020-11-29 20:12:57,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:57,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 20:12:57,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054170322] [2020-11-29 20:12:57,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:12:57,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:57,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:12:57,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:12:57,221 INFO L87 Difference]: Start difference. First operand 198 states and 217 transitions. Second operand 9 states. [2020-11-29 20:12:57,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:57,279 INFO L93 Difference]: Finished difference Result 254 states and 279 transitions. [2020-11-29 20:12:57,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 20:12:57,280 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 197 [2020-11-29 20:12:57,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:57,281 INFO L225 Difference]: With dead ends: 254 [2020-11-29 20:12:57,281 INFO L226 Difference]: Without dead ends: 201 [2020-11-29 20:12:57,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:12:57,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-29 20:12:57,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-11-29 20:12:57,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-11-29 20:12:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 219 transitions. [2020-11-29 20:12:57,297 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 219 transitions. Word has length 197 [2020-11-29 20:12:57,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:57,297 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 219 transitions. [2020-11-29 20:12:57,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:12:57,298 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 219 transitions. [2020-11-29 20:12:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-11-29 20:12:57,299 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:57,300 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 10, 10, 10, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:57,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-29 20:12:57,505 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:57,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:57,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2110535502, now seen corresponding path program 28 times [2020-11-29 20:12:57,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:57,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038362236] [2020-11-29 20:12:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:57,522 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:57,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933279381] [2020-11-29 20:12:57,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:57,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:12:57,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:12:57,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:12:57,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:12:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 149 proven. 155 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2020-11-29 20:12:57,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038362236] [2020-11-29 20:12:57,851 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:12:57,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933279381] [2020-11-29 20:12:57,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:12:57,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 20:12:57,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690927751] [2020-11-29 20:12:57,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 20:12:57,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:12:57,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 20:12:57,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:12:57,854 INFO L87 Difference]: Start difference. First operand 200 states and 219 transitions. Second operand 13 states. [2020-11-29 20:12:58,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:12:58,166 INFO L93 Difference]: Finished difference Result 344 states and 384 transitions. [2020-11-29 20:12:58,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:12:58,166 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 199 [2020-11-29 20:12:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:12:58,167 INFO L225 Difference]: With dead ends: 344 [2020-11-29 20:12:58,167 INFO L226 Difference]: Without dead ends: 209 [2020-11-29 20:12:58,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:12:58,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-29 20:12:58,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2020-11-29 20:12:58,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-11-29 20:12:58,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 228 transitions. [2020-11-29 20:12:58,180 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 228 transitions. Word has length 199 [2020-11-29 20:12:58,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:12:58,180 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 228 transitions. [2020-11-29 20:12:58,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 20:12:58,181 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 228 transitions. [2020-11-29 20:12:58,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-11-29 20:12:58,182 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:58,182 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 11, 11, 11, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:12:58,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:12:58,395 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:58,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:58,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1207066673, now seen corresponding path program 29 times [2020-11-29 20:12:58,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:58,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532618816] [2020-11-29 20:12:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:58,417 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:12:58,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911443409] [2020-11-29 20:12:58,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:00,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-11-29 20:13:00,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:00,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 20:13:00,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2020-11-29 20:13:00,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532618816] [2020-11-29 20:13:00,877 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:13:00,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911443409] [2020-11-29 20:13:00,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:13:00,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-11-29 20:13:00,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444233035] [2020-11-29 20:13:00,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 20:13:00,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:00,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 20:13:00,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-11-29 20:13:00,880 INFO L87 Difference]: Start difference. First operand 209 states and 228 transitions. Second operand 19 states. [2020-11-29 20:13:00,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:00,960 INFO L93 Difference]: Finished difference Result 386 states and 424 transitions. [2020-11-29 20:13:00,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 20:13:00,963 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 208 [2020-11-29 20:13:00,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:00,965 INFO L225 Difference]: With dead ends: 386 [2020-11-29 20:13:00,965 INFO L226 Difference]: Without dead ends: 212 [2020-11-29 20:13:00,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-11-29 20:13:00,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-11-29 20:13:00,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2020-11-29 20:13:00,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-11-29 20:13:00,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 230 transitions. [2020-11-29 20:13:00,976 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 230 transitions. Word has length 208 [2020-11-29 20:13:00,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:00,977 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 230 transitions. [2020-11-29 20:13:00,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 20:13:00,977 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 230 transitions. [2020-11-29 20:13:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-11-29 20:13:00,979 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:00,979 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 11, 11, 11, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:01,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:01,207 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:01,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:01,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1182039855, now seen corresponding path program 30 times [2020-11-29 20:13:01,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:01,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217971568] [2020-11-29 20:13:01,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:01,225 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:13:01,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994140512] [2020-11-29 20:13:01,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:02,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-11-29 20:13:02,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:02,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 20:13:02,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1417 trivial. 0 not checked. [2020-11-29 20:13:02,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217971568] [2020-11-29 20:13:02,665 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:13:02,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994140512] [2020-11-29 20:13:02,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:13:02,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-29 20:13:02,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474393369] [2020-11-29 20:13:02,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 20:13:02,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:02,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 20:13:02,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:13:02,668 INFO L87 Difference]: Start difference. First operand 211 states and 230 transitions. Second operand 10 states. [2020-11-29 20:13:02,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:02,723 INFO L93 Difference]: Finished difference Result 270 states and 295 transitions. [2020-11-29 20:13:02,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 20:13:02,724 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 210 [2020-11-29 20:13:02,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:02,725 INFO L225 Difference]: With dead ends: 270 [2020-11-29 20:13:02,725 INFO L226 Difference]: Without dead ends: 214 [2020-11-29 20:13:02,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:13:02,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-11-29 20:13:02,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2020-11-29 20:13:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-11-29 20:13:02,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 232 transitions. [2020-11-29 20:13:02,735 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 232 transitions. Word has length 210 [2020-11-29 20:13:02,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:02,736 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 232 transitions. [2020-11-29 20:13:02,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 20:13:02,736 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 232 transitions. [2020-11-29 20:13:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-11-29 20:13:02,738 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:02,738 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 11, 11, 11, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:02,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-29 20:13:02,951 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:02,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:02,952 INFO L82 PathProgramCache]: Analyzing trace with hash -2058395885, now seen corresponding path program 31 times [2020-11-29 20:13:02,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:02,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328403100] [2020-11-29 20:13:02,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:02,966 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:13:02,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97157849] [2020-11-29 20:13:02,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:03,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 20:13:03,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1481 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1192 trivial. 0 not checked. [2020-11-29 20:13:03,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328403100] [2020-11-29 20:13:03,480 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:13:03,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97157849] [2020-11-29 20:13:03,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:13:03,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-29 20:13:03,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108114695] [2020-11-29 20:13:03,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 20:13:03,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:03,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 20:13:03,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-29 20:13:03,482 INFO L87 Difference]: Start difference. First operand 213 states and 232 transitions. Second operand 20 states. [2020-11-29 20:13:03,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:03,559 INFO L93 Difference]: Finished difference Result 392 states and 430 transitions. [2020-11-29 20:13:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 20:13:03,560 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 212 [2020-11-29 20:13:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:03,562 INFO L225 Difference]: With dead ends: 392 [2020-11-29 20:13:03,562 INFO L226 Difference]: Without dead ends: 216 [2020-11-29 20:13:03,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-29 20:13:03,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-11-29 20:13:03,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2020-11-29 20:13:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-11-29 20:13:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 234 transitions. [2020-11-29 20:13:03,573 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 234 transitions. Word has length 212 [2020-11-29 20:13:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:03,574 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 234 transitions. [2020-11-29 20:13:03,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 20:13:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 234 transitions. [2020-11-29 20:13:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-11-29 20:13:03,576 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:03,576 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 16, 16, 16, 16, 11, 11, 11, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:03,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:03,795 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:03,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:03,796 INFO L82 PathProgramCache]: Analyzing trace with hash -485429483, now seen corresponding path program 32 times [2020-11-29 20:13:03,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:03,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485035879] [2020-11-29 20:13:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:03,809 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:13:03,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627507030] [2020-11-29 20:13:03,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:03,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:13:03,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:03,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 20:13:03,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1192 trivial. 0 not checked. [2020-11-29 20:13:04,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485035879] [2020-11-29 20:13:04,372 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:13:04,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627507030] [2020-11-29 20:13:04,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:13:04,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-11-29 20:13:04,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306276932] [2020-11-29 20:13:04,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 20:13:04,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:04,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 20:13:04,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-29 20:13:04,374 INFO L87 Difference]: Start difference. First operand 215 states and 234 transitions. Second operand 21 states. [2020-11-29 20:13:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:04,472 INFO L93 Difference]: Finished difference Result 394 states and 432 transitions. [2020-11-29 20:13:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 20:13:04,473 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 214 [2020-11-29 20:13:04,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:04,475 INFO L225 Difference]: With dead ends: 394 [2020-11-29 20:13:04,475 INFO L226 Difference]: Without dead ends: 218 [2020-11-29 20:13:04,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-29 20:13:04,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-11-29 20:13:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2020-11-29 20:13:04,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-11-29 20:13:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 236 transitions. [2020-11-29 20:13:04,486 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 236 transitions. Word has length 214 [2020-11-29 20:13:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:04,487 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 236 transitions. [2020-11-29 20:13:04,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 20:13:04,487 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 236 transitions. [2020-11-29 20:13:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-11-29 20:13:04,489 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:04,489 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 16, 16, 16, 16, 16, 16, 11, 11, 11, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:04,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:04,703 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:04,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:04,704 INFO L82 PathProgramCache]: Analyzing trace with hash -693205353, now seen corresponding path program 33 times [2020-11-29 20:13:04,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:04,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181453497] [2020-11-29 20:13:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:04,720 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:13:04,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048400394] [2020-11-29 20:13:04,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:05,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-29 20:13:05,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:05,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 20:13:05,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1553 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1489 trivial. 0 not checked. [2020-11-29 20:13:05,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181453497] [2020-11-29 20:13:05,638 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:13:05,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048400394] [2020-11-29 20:13:05,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:13:05,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-29 20:13:05,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941833041] [2020-11-29 20:13:05,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 20:13:05,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:05,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 20:13:05,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:13:05,639 INFO L87 Difference]: Start difference. First operand 217 states and 236 transitions. Second operand 11 states. [2020-11-29 20:13:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:05,712 INFO L93 Difference]: Finished difference Result 276 states and 301 transitions. [2020-11-29 20:13:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:13:05,713 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 216 [2020-11-29 20:13:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:05,714 INFO L225 Difference]: With dead ends: 276 [2020-11-29 20:13:05,714 INFO L226 Difference]: Without dead ends: 220 [2020-11-29 20:13:05,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:13:05,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-11-29 20:13:05,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2020-11-29 20:13:05,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-11-29 20:13:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 238 transitions. [2020-11-29 20:13:05,727 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 238 transitions. Word has length 216 [2020-11-29 20:13:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:05,727 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 238 transitions. [2020-11-29 20:13:05,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 20:13:05,728 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 238 transitions. [2020-11-29 20:13:05,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-11-29 20:13:05,729 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:05,730 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 16, 16, 16, 16, 16, 16, 11, 11, 11, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:05,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-29 20:13:05,935 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:05,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:05,936 INFO L82 PathProgramCache]: Analyzing trace with hash -439874727, now seen corresponding path program 34 times [2020-11-29 20:13:05,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:05,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286741553] [2020-11-29 20:13:05,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:05,954 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:13:05,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744282385] [2020-11-29 20:13:05,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:06,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:13:06,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:06,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 20:13:06,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1570 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1209 trivial. 0 not checked. [2020-11-29 20:13:06,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286741553] [2020-11-29 20:13:06,530 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:13:06,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744282385] [2020-11-29 20:13:06,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:13:06,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-29 20:13:06,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509004397] [2020-11-29 20:13:06,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 20:13:06,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:06,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 20:13:06,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:13:06,532 INFO L87 Difference]: Start difference. First operand 219 states and 238 transitions. Second operand 22 states. [2020-11-29 20:13:06,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:06,642 INFO L93 Difference]: Finished difference Result 399 states and 437 transitions. [2020-11-29 20:13:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 20:13:06,642 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 218 [2020-11-29 20:13:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:06,644 INFO L225 Difference]: With dead ends: 399 [2020-11-29 20:13:06,644 INFO L226 Difference]: Without dead ends: 221 [2020-11-29 20:13:06,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:13:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-11-29 20:13:06,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-11-29 20:13:06,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-11-29 20:13:06,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 240 transitions. [2020-11-29 20:13:06,655 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 240 transitions. Word has length 218 [2020-11-29 20:13:06,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:06,656 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 240 transitions. [2020-11-29 20:13:06,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 20:13:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 240 transitions. [2020-11-29 20:13:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-11-29 20:13:06,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:06,658 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 16, 16, 16, 16, 16, 16, 11, 11, 11, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:06,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-29 20:13:06,875 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:06,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:06,876 INFO L82 PathProgramCache]: Analyzing trace with hash 434770395, now seen corresponding path program 35 times [2020-11-29 20:13:06,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:06,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250609894] [2020-11-29 20:13:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:06,890 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:13:06,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910263897] [2020-11-29 20:13:06,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:10,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-11-29 20:13:10,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:10,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 20:13:10,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1528 trivial. 0 not checked. [2020-11-29 20:13:11,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250609894] [2020-11-29 20:13:11,188 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:13:11,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910263897] [2020-11-29 20:13:11,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:13:11,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-29 20:13:11,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319899028] [2020-11-29 20:13:11,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 20:13:11,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:11,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 20:13:11,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:13:11,190 INFO L87 Difference]: Start difference. First operand 221 states and 240 transitions. Second operand 12 states. [2020-11-29 20:13:11,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:11,295 INFO L93 Difference]: Finished difference Result 280 states and 305 transitions. [2020-11-29 20:13:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 20:13:11,296 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 220 [2020-11-29 20:13:11,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:11,297 INFO L225 Difference]: With dead ends: 280 [2020-11-29 20:13:11,297 INFO L226 Difference]: Without dead ends: 224 [2020-11-29 20:13:11,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:13:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-11-29 20:13:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2020-11-29 20:13:11,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-11-29 20:13:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 242 transitions. [2020-11-29 20:13:11,306 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 242 transitions. Word has length 220 [2020-11-29 20:13:11,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:11,306 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 242 transitions. [2020-11-29 20:13:11,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 20:13:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 242 transitions. [2020-11-29 20:13:11,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-11-29 20:13:11,308 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:11,309 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 16, 16, 16, 16, 16, 16, 11, 11, 11, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:11,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-29 20:13:11,523 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:11,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1213060509, now seen corresponding path program 36 times [2020-11-29 20:13:11,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:11,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512371252] [2020-11-29 20:13:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:11,545 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:13:11,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804654272] [2020-11-29 20:13:11,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:22,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-29 20:13:22,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:22,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:13:22,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1628 backedges. 181 proven. 40 refuted. 0 times theorem prover too weak. 1407 trivial. 0 not checked. [2020-11-29 20:13:22,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512371252] [2020-11-29 20:13:22,298 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:13:22,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804654272] [2020-11-29 20:13:22,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:13:22,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 20:13:22,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357525359] [2020-11-29 20:13:22,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:13:22,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:22,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:13:22,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:13:22,300 INFO L87 Difference]: Start difference. First operand 223 states and 242 transitions. Second operand 9 states. [2020-11-29 20:13:22,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:22,547 INFO L93 Difference]: Finished difference Result 368 states and 408 transitions. [2020-11-29 20:13:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 20:13:22,548 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 222 [2020-11-29 20:13:22,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:22,549 INFO L225 Difference]: With dead ends: 368 [2020-11-29 20:13:22,550 INFO L226 Difference]: Without dead ends: 238 [2020-11-29 20:13:22,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:13:22,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-11-29 20:13:22,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 232. [2020-11-29 20:13:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-11-29 20:13:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 254 transitions. [2020-11-29 20:13:22,561 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 254 transitions. Word has length 222 [2020-11-29 20:13:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:22,561 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 254 transitions. [2020-11-29 20:13:22,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:13:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 254 transitions. [2020-11-29 20:13:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-11-29 20:13:22,563 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:22,564 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 17, 17, 17, 17, 17, 11, 11, 11, 10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:22,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:22,780 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:22,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:22,780 INFO L82 PathProgramCache]: Analyzing trace with hash -88774018, now seen corresponding path program 37 times [2020-11-29 20:13:22,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:22,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545973486] [2020-11-29 20:13:22,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:22,800 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:13:22,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052652044] [2020-11-29 20:13:22,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:22,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 20:13:22,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1775 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-11-29 20:13:23,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545973486] [2020-11-29 20:13:23,243 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:13:23,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052652044] [2020-11-29 20:13:23,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:13:23,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-29 20:13:23,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25777196] [2020-11-29 20:13:23,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 20:13:23,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:23,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 20:13:23,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-29 20:13:23,245 INFO L87 Difference]: Start difference. First operand 232 states and 254 transitions. Second operand 20 states. [2020-11-29 20:13:23,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:23,622 INFO L93 Difference]: Finished difference Result 383 states and 428 transitions. [2020-11-29 20:13:23,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 20:13:23,622 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 231 [2020-11-29 20:13:23,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:23,623 INFO L225 Difference]: With dead ends: 383 [2020-11-29 20:13:23,624 INFO L226 Difference]: Without dead ends: 247 [2020-11-29 20:13:23,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-29 20:13:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-11-29 20:13:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 241. [2020-11-29 20:13:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-11-29 20:13:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 266 transitions. [2020-11-29 20:13:23,633 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 266 transitions. Word has length 231 [2020-11-29 20:13:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:23,634 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 266 transitions. [2020-11-29 20:13:23,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 20:13:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 266 transitions. [2020-11-29 20:13:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-11-29 20:13:23,636 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:23,636 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 18, 18, 11, 11, 11, 10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:23,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-29 20:13:23,851 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:23,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:23,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1781238973, now seen corresponding path program 38 times [2020-11-29 20:13:23,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:23,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541872586] [2020-11-29 20:13:23,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:23,877 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:13:23,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954454768] [2020-11-29 20:13:23,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:24,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:13:24,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:24,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 20:13:24,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1931 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1454 trivial. 0 not checked. [2020-11-29 20:13:24,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541872586] [2020-11-29 20:13:24,481 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:13:24,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954454768] [2020-11-29 20:13:24,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:13:24,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-11-29 20:13:24,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947476105] [2020-11-29 20:13:24,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 20:13:24,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:24,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 20:13:24,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-29 20:13:24,483 INFO L87 Difference]: Start difference. First operand 241 states and 266 transitions. Second operand 21 states. [2020-11-29 20:13:24,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:24,864 INFO L93 Difference]: Finished difference Result 398 states and 448 transitions. [2020-11-29 20:13:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 20:13:24,865 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 240 [2020-11-29 20:13:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:24,866 INFO L225 Difference]: With dead ends: 398 [2020-11-29 20:13:24,866 INFO L226 Difference]: Without dead ends: 256 [2020-11-29 20:13:24,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-29 20:13:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-11-29 20:13:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 250. [2020-11-29 20:13:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-11-29 20:13:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 278 transitions. [2020-11-29 20:13:24,877 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 278 transitions. Word has length 240 [2020-11-29 20:13:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:24,877 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 278 transitions. [2020-11-29 20:13:24,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 20:13:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 278 transitions. [2020-11-29 20:13:24,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-11-29 20:13:24,880 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:24,880 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 11, 11, 11, 10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:25,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:25,107 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:25,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:25,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1278788062, now seen corresponding path program 39 times [2020-11-29 20:13:25,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:25,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118413249] [2020-11-29 20:13:25,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:25,124 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:13:25,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778472361] [2020-11-29 20:13:25,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:26,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-29 20:13:26,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:26,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:13:26,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2096 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1996 trivial. 0 not checked. [2020-11-29 20:13:26,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118413249] [2020-11-29 20:13:26,445 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:13:26,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778472361] [2020-11-29 20:13:26,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:13:26,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 20:13:26,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14303677] [2020-11-29 20:13:26,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 20:13:26,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:26,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 20:13:26,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:13:26,447 INFO L87 Difference]: Start difference. First operand 250 states and 278 transitions. Second operand 13 states. [2020-11-29 20:13:26,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:26,496 INFO L93 Difference]: Finished difference Result 318 states and 355 transitions. [2020-11-29 20:13:26,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:13:26,496 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 249 [2020-11-29 20:13:26,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:26,498 INFO L225 Difference]: With dead ends: 318 [2020-11-29 20:13:26,499 INFO L226 Difference]: Without dead ends: 253 [2020-11-29 20:13:26,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:13:26,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-11-29 20:13:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2020-11-29 20:13:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-11-29 20:13:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 280 transitions. [2020-11-29 20:13:26,510 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 280 transitions. Word has length 249 [2020-11-29 20:13:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:26,510 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 280 transitions. [2020-11-29 20:13:26,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 20:13:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 280 transitions. [2020-11-29 20:13:26,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-11-29 20:13:26,513 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:26,513 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 11, 11, 11, 11, 11, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:26,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:26,722 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:26,722 INFO L82 PathProgramCache]: Analyzing trace with hash 33701532, now seen corresponding path program 40 times [2020-11-29 20:13:26,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:26,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748456009] [2020-11-29 20:13:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:26,738 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:13:26,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146464667] [2020-11-29 20:13:26,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:26,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:13:26,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:26,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 20:13:26,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1585 trivial. 0 not checked. [2020-11-29 20:13:27,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748456009] [2020-11-29 20:13:27,414 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:13:27,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146464667] [2020-11-29 20:13:27,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:13:27,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-29 20:13:27,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484221358] [2020-11-29 20:13:27,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 20:13:27,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:27,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 20:13:27,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:13:27,416 INFO L87 Difference]: Start difference. First operand 252 states and 280 transitions. Second operand 22 states. [2020-11-29 20:13:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:27,939 INFO L93 Difference]: Finished difference Result 411 states and 463 transitions. [2020-11-29 20:13:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 20:13:27,939 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 251 [2020-11-29 20:13:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:27,940 INFO L225 Difference]: With dead ends: 411 [2020-11-29 20:13:27,940 INFO L226 Difference]: Without dead ends: 261 [2020-11-29 20:13:27,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:13:27,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-11-29 20:13:27,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2020-11-29 20:13:27,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-11-29 20:13:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 292 transitions. [2020-11-29 20:13:27,949 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 292 transitions. Word has length 251 [2020-11-29 20:13:27,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:27,949 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 292 transitions. [2020-11-29 20:13:27,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 20:13:27,949 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 292 transitions. [2020-11-29 20:13:27,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-11-29 20:13:27,951 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:27,951 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 11, 11, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:28,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-11-29 20:13:28,171 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:28,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:28,172 INFO L82 PathProgramCache]: Analyzing trace with hash 344593439, now seen corresponding path program 41 times [2020-11-29 20:13:28,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:28,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395844526] [2020-11-29 20:13:28,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:28,188 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:13:28,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081952826] [2020-11-29 20:13:28,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:53,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-11-29 20:13:53,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:53,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 20:13:53,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2020-11-29 20:13:54,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395844526] [2020-11-29 20:13:54,051 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:13:54,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081952826] [2020-11-29 20:13:54,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:13:54,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-29 20:13:54,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040139573] [2020-11-29 20:13:54,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 20:13:54,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:54,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 20:13:54,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:13:54,053 INFO L87 Difference]: Start difference. First operand 261 states and 292 transitions. Second operand 14 states. [2020-11-29 20:13:54,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:54,101 INFO L93 Difference]: Finished difference Result 332 states and 373 transitions. [2020-11-29 20:13:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 20:13:54,101 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 260 [2020-11-29 20:13:54,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:54,103 INFO L225 Difference]: With dead ends: 332 [2020-11-29 20:13:54,103 INFO L226 Difference]: Without dead ends: 264 [2020-11-29 20:13:54,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:13:54,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-11-29 20:13:54,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2020-11-29 20:13:54,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-11-29 20:13:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 294 transitions. [2020-11-29 20:13:54,111 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 294 transitions. Word has length 260 [2020-11-29 20:13:54,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:54,112 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 294 transitions. [2020-11-29 20:13:54,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 20:13:54,112 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 294 transitions. [2020-11-29 20:13:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-11-29 20:13:54,114 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:54,114 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 12, 12, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:54,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:54,327 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:54,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:54,328 INFO L82 PathProgramCache]: Analyzing trace with hash -197065759, now seen corresponding path program 42 times [2020-11-29 20:13:54,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:54,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402504573] [2020-11-29 20:13:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:54,344 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:13:54,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004092347] [2020-11-29 20:13:54,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:03,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-11-29 20:14:03,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:03,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 20:14:03,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2020-11-29 20:14:03,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402504573] [2020-11-29 20:14:03,354 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:14:03,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004092347] [2020-11-29 20:14:03,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:14:03,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-11-29 20:14:03,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677071544] [2020-11-29 20:14:03,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 20:14:03,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:03,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 20:14:03,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-29 20:14:03,355 INFO L87 Difference]: Start difference. First operand 263 states and 294 transitions. Second operand 15 states. [2020-11-29 20:14:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:03,405 INFO L93 Difference]: Finished difference Result 334 states and 375 transitions. [2020-11-29 20:14:03,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 20:14:03,405 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 262 [2020-11-29 20:14:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:03,406 INFO L225 Difference]: With dead ends: 334 [2020-11-29 20:14:03,407 INFO L226 Difference]: Without dead ends: 266 [2020-11-29 20:14:03,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-29 20:14:03,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-11-29 20:14:03,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2020-11-29 20:14:03,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-11-29 20:14:03,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 296 transitions. [2020-11-29 20:14:03,417 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 296 transitions. Word has length 262 [2020-11-29 20:14:03,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:03,418 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 296 transitions. [2020-11-29 20:14:03,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 20:14:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 296 transitions. [2020-11-29 20:14:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-11-29 20:14:03,420 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:03,420 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:03,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-29 20:14:03,647 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:03,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:03,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1040512221, now seen corresponding path program 43 times [2020-11-29 20:14:03,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:03,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144816474] [2020-11-29 20:14:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:03,661 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:14:03,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029436045] [2020-11-29 20:14:03,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:03,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 20:14:03,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2339 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2020-11-29 20:14:04,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144816474] [2020-11-29 20:14:04,120 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:14:04,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029436045] [2020-11-29 20:14:04,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:14:04,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-29 20:14:04,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266004414] [2020-11-29 20:14:04,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 20:14:04,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:04,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 20:14:04,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:14:04,122 INFO L87 Difference]: Start difference. First operand 265 states and 296 transitions. Second operand 16 states. [2020-11-29 20:14:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:04,184 INFO L93 Difference]: Finished difference Result 336 states and 377 transitions. [2020-11-29 20:14:04,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 20:14:04,184 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 264 [2020-11-29 20:14:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:04,186 INFO L225 Difference]: With dead ends: 336 [2020-11-29 20:14:04,186 INFO L226 Difference]: Without dead ends: 268 [2020-11-29 20:14:04,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:14:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-11-29 20:14:04,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2020-11-29 20:14:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-11-29 20:14:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 298 transitions. [2020-11-29 20:14:04,196 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 298 transitions. Word has length 264 [2020-11-29 20:14:04,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:04,196 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 298 transitions. [2020-11-29 20:14:04,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 20:14:04,196 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 298 transitions. [2020-11-29 20:14:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-11-29 20:14:04,198 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:04,199 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:04,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-29 20:14:04,411 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:04,412 INFO L82 PathProgramCache]: Analyzing trace with hash 156256741, now seen corresponding path program 44 times [2020-11-29 20:14:04,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:04,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031561970] [2020-11-29 20:14:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:04,429 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:14:04,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281840318] [2020-11-29 20:14:04,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:04,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:14:04,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:04,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 20:14:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2366 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2020-11-29 20:14:05,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031561970] [2020-11-29 20:14:05,219 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:14:05,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281840318] [2020-11-29 20:14:05,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:14:05,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-11-29 20:14:05,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088137586] [2020-11-29 20:14:05,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 20:14:05,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:05,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 20:14:05,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-29 20:14:05,221 INFO L87 Difference]: Start difference. First operand 267 states and 298 transitions. Second operand 17 states. [2020-11-29 20:14:05,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:05,296 INFO L93 Difference]: Finished difference Result 338 states and 379 transitions. [2020-11-29 20:14:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 20:14:05,296 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 266 [2020-11-29 20:14:05,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:05,298 INFO L225 Difference]: With dead ends: 338 [2020-11-29 20:14:05,298 INFO L226 Difference]: Without dead ends: 270 [2020-11-29 20:14:05,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-29 20:14:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-11-29 20:14:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2020-11-29 20:14:05,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-11-29 20:14:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 300 transitions. [2020-11-29 20:14:05,309 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 300 transitions. Word has length 266 [2020-11-29 20:14:05,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:05,309 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 300 transitions. [2020-11-29 20:14:05,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 20:14:05,309 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 300 transitions. [2020-11-29 20:14:05,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-11-29 20:14:05,311 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:05,311 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 15, 15, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:05,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:05,515 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:05,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:05,516 INFO L82 PathProgramCache]: Analyzing trace with hash -800006105, now seen corresponding path program 45 times [2020-11-29 20:14:05,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:05,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081740172] [2020-11-29 20:14:05,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:05,532 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:14:05,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929162869] [2020-11-29 20:14:05,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:09,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-29 20:14:09,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:09,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-29 20:14:09,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2020-11-29 20:14:10,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081740172] [2020-11-29 20:14:10,239 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:14:10,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929162869] [2020-11-29 20:14:10,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:14:10,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-29 20:14:10,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394246118] [2020-11-29 20:14:10,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 20:14:10,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:10,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 20:14:10,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:14:10,244 INFO L87 Difference]: Start difference. First operand 269 states and 300 transitions. Second operand 18 states. [2020-11-29 20:14:10,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:10,325 INFO L93 Difference]: Finished difference Result 340 states and 381 transitions. [2020-11-29 20:14:10,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 20:14:10,326 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 268 [2020-11-29 20:14:10,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:10,327 INFO L225 Difference]: With dead ends: 340 [2020-11-29 20:14:10,327 INFO L226 Difference]: Without dead ends: 272 [2020-11-29 20:14:10,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:14:10,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-11-29 20:14:10,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2020-11-29 20:14:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-11-29 20:14:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 302 transitions. [2020-11-29 20:14:10,339 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 302 transitions. Word has length 268 [2020-11-29 20:14:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:10,340 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 302 transitions. [2020-11-29 20:14:10,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 20:14:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 302 transitions. [2020-11-29 20:14:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-11-29 20:14:10,341 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:10,342 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 16, 16, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:10,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-29 20:14:10,554 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:10,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:10,554 INFO L82 PathProgramCache]: Analyzing trace with hash -645599767, now seen corresponding path program 46 times [2020-11-29 20:14:10,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:10,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529561457] [2020-11-29 20:14:10,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:10,566 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:14:10,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211877051] [2020-11-29 20:14:10,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:10,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:14:10,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:10,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 20:14:10,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2020-11-29 20:14:11,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529561457] [2020-11-29 20:14:11,016 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:14:11,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211877051] [2020-11-29 20:14:11,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:14:11,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-11-29 20:14:11,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611891519] [2020-11-29 20:14:11,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 20:14:11,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:11,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 20:14:11,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-11-29 20:14:11,017 INFO L87 Difference]: Start difference. First operand 271 states and 302 transitions. Second operand 19 states. [2020-11-29 20:14:11,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:11,076 INFO L93 Difference]: Finished difference Result 342 states and 383 transitions. [2020-11-29 20:14:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 20:14:11,076 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 270 [2020-11-29 20:14:11,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:11,078 INFO L225 Difference]: With dead ends: 342 [2020-11-29 20:14:11,078 INFO L226 Difference]: Without dead ends: 274 [2020-11-29 20:14:11,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-11-29 20:14:11,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-11-29 20:14:11,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2020-11-29 20:14:11,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-11-29 20:14:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 304 transitions. [2020-11-29 20:14:11,091 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 304 transitions. Word has length 270 [2020-11-29 20:14:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:11,091 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 304 transitions. [2020-11-29 20:14:11,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 20:14:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 304 transitions. [2020-11-29 20:14:11,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-11-29 20:14:11,093 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:11,093 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 17, 17, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:11,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:11,303 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:11,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:11,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1710002987, now seen corresponding path program 47 times [2020-11-29 20:14:11,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:11,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179907427] [2020-11-29 20:14:11,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:11,320 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:14:11,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306022368] [2020-11-29 20:14:11,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:00,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-11-29 20:16:00,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:16:02,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 20:16:02,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2020-11-29 20:16:03,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179907427] [2020-11-29 20:16:03,275 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:16:03,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306022368] [2020-11-29 20:16:03,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:16:03,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-29 20:16:03,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089078138] [2020-11-29 20:16:03,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 20:16:03,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:03,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 20:16:03,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-29 20:16:03,277 INFO L87 Difference]: Start difference. First operand 273 states and 304 transitions. Second operand 20 states. [2020-11-29 20:16:03,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:16:03,346 INFO L93 Difference]: Finished difference Result 344 states and 385 transitions. [2020-11-29 20:16:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 20:16:03,347 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 272 [2020-11-29 20:16:03,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:16:03,349 INFO L225 Difference]: With dead ends: 344 [2020-11-29 20:16:03,349 INFO L226 Difference]: Without dead ends: 276 [2020-11-29 20:16:03,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-29 20:16:03,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-11-29 20:16:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2020-11-29 20:16:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-11-29 20:16:03,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 306 transitions. [2020-11-29 20:16:03,359 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 306 transitions. Word has length 272 [2020-11-29 20:16:03,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:16:03,359 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 306 transitions. [2020-11-29 20:16:03,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 20:16:03,360 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 306 transitions. [2020-11-29 20:16:03,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-11-29 20:16:03,362 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:16:03,362 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 18, 18, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:03,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-29 20:16:03,575 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:03,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1996484589, now seen corresponding path program 48 times [2020-11-29 20:16:03,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:03,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563903949] [2020-11-29 20:16:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:03,589 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:16:03,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189055794] [2020-11-29 20:16:03,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:33,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-11-29 20:16:33,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:16:33,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 68 conjunts are in the unsatisfiable core [2020-11-29 20:16:33,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 155 proven. 324 refuted. 0 times theorem prover too weak. 2015 trivial. 0 not checked. [2020-11-29 20:16:34,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563903949] [2020-11-29 20:16:34,305 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:16:34,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189055794] [2020-11-29 20:16:34,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:16:34,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-11-29 20:16:34,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097627166] [2020-11-29 20:16:34,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-29 20:16:34,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:34,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-29 20:16:34,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=380, Unknown=0, NotChecked=0, Total=600 [2020-11-29 20:16:34,308 INFO L87 Difference]: Start difference. First operand 275 states and 306 transitions. Second operand 25 states. [2020-11-29 20:16:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:16:34,989 INFO L93 Difference]: Finished difference Result 345 states and 386 transitions. [2020-11-29 20:16:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-29 20:16:34,990 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 274 [2020-11-29 20:16:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:16:34,991 INFO L225 Difference]: With dead ends: 345 [2020-11-29 20:16:34,991 INFO L226 Difference]: Without dead ends: 277 [2020-11-29 20:16:34,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=686, Invalid=1384, Unknown=0, NotChecked=0, Total=2070 [2020-11-29 20:16:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-11-29 20:16:35,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2020-11-29 20:16:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-11-29 20:16:35,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 308 transitions. [2020-11-29 20:16:35,002 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 308 transitions. Word has length 274 [2020-11-29 20:16:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:16:35,003 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 308 transitions. [2020-11-29 20:16:35,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-29 20:16:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 308 transitions. [2020-11-29 20:16:35,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-11-29 20:16:35,005 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:16:35,006 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:35,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:35,231 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:35,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:35,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1867570129, now seen corresponding path program 49 times [2020-11-29 20:16:35,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:35,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77258875] [2020-11-29 20:16:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:35,252 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:16:35,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534998393] [2020-11-29 20:16:35,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:16:40,044 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:16:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:16:44,711 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:16:45,134 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:16:45,134 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 20:16:45,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-11-29 20:16:45,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:16:45 BoogieIcfgContainer [2020-11-29 20:16:45,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:16:45,623 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:16:45,623 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:16:45,624 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:16:45,624 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:12:26" (3/4) ... [2020-11-29 20:16:45,627 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 20:16:45,823 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_461404f3-1500-4fbe-abf7-a3c75b48ee33/bin/uautomizer/witness.graphml [2020-11-29 20:16:45,824 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:16:45,826 INFO L168 Benchmark]: Toolchain (without parser) took 260416.81 ms. Allocated memory was 88.1 MB in the beginning and 234.9 MB in the end (delta: 146.8 MB). Free memory was 54.0 MB in the beginning and 177.8 MB in the end (delta: -123.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.1 GB. [2020-11-29 20:16:45,826 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 88.1 MB. Free memory was 61.9 MB in the beginning and 61.9 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:16:45,827 INFO L168 Benchmark]: CACSL2BoogieTranslator took 433.02 ms. Allocated memory is still 88.1 MB. Free memory was 53.9 MB in the beginning and 64.8 MB in the end (delta: -11.0 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-11-29 20:16:45,827 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.34 ms. Allocated memory is still 88.1 MB. Free memory was 64.8 MB in the beginning and 62.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:16:45,828 INFO L168 Benchmark]: Boogie Preprocessor took 70.12 ms. Allocated memory is still 88.1 MB. Free memory was 62.8 MB in the beginning and 61.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:16:45,828 INFO L168 Benchmark]: RCFGBuilder took 659.58 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 61.4 MB in the beginning and 88.8 MB in the end (delta: -27.4 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2020-11-29 20:16:45,829 INFO L168 Benchmark]: TraceAbstraction took 258968.02 ms. Allocated memory was 111.1 MB in the beginning and 234.9 MB in the end (delta: 123.7 MB). Free memory was 88.3 MB in the beginning and 198.8 MB in the end (delta: -110.5 MB). Peak memory consumption was 145.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:16:45,830 INFO L168 Benchmark]: Witness Printer took 200.57 ms. Allocated memory is still 234.9 MB. Free memory was 198.8 MB in the beginning and 177.8 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-29 20:16:45,832 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 88.1 MB. Free memory was 61.9 MB in the beginning and 61.9 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 433.02 ms. Allocated memory is still 88.1 MB. Free memory was 53.9 MB in the beginning and 64.8 MB in the end (delta: -11.0 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.34 ms. Allocated memory is still 88.1 MB. Free memory was 64.8 MB in the beginning and 62.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.12 ms. Allocated memory is still 88.1 MB. Free memory was 62.8 MB in the beginning and 61.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 659.58 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 61.4 MB in the beginning and 88.8 MB in the end (delta: -27.4 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 258968.02 ms. Allocated memory was 111.1 MB in the beginning and 234.9 MB in the end (delta: 123.7 MB). Free memory was 88.3 MB in the beginning and 198.8 MB in the end (delta: -110.5 MB). Peak memory consumption was 145.1 MB. Max. memory is 16.1 GB. * Witness Printer took 200.57 ms. Allocated memory is still 234.9 MB. Free memory was 198.8 MB in the beginning and 177.8 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L42] int x[20]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 20) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<20 -1) [L57] x[20 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "rangesum20.c", 18, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 258.6s, OverallIterations: 62, TraceHistogramMax: 20, AutomataDifference: 7.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1812 SDtfs, 2568 SDslu, 3818 SDs, 0 SdLazy, 2958 SolverSat, 1296 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8760 GetRequests, 8161 SyntacticMatches, 0 SemanticMatches, 599 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 8.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=277occurred in iteration=61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 61 MinimizatonAttempts, 184 StatesRemovedByMinimization, 55 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.9s SsaConstructionTime, 212.7s SatisfiabilityAnalysisTime, 13.9s InterpolantComputationTime, 9274 NumberOfCodeBlocks, 8206 NumberOfCodeBlocksAsserted, 356 NumberOfCheckSat, 8931 ConstructedInterpolants, 0 QuantifiedInterpolants, 2132297 SizeOfPredicates, 83 NumberOfNonLiveVariables, 20576 ConjunctsInSsa, 694 ConjunctsInUnsatCore, 67 InterpolantComputations, 8 PerfectInterpolantSequences, 47974/54660 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...