./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c --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_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 e4be225ddf5726de15d96df20c7b0d434801c413 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:42:02,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:42:02,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:42:02,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:42:02,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:42:02,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:42:02,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:42:02,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:42:02,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:42:02,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:42:02,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:42:02,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:42:02,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:42:02,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:42:02,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:42:02,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:42:02,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:42:02,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:42:02,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:42:02,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:42:02,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:42:02,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:42:02,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:42:02,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:42:02,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:42:02,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:42:02,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:42:02,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:42:02,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:42:02,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:42:02,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:42:02,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:42:02,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:42:02,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:42:02,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:42:02,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:42:02,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:42:02,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:42:02,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:42:02,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:42:02,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:42:02,868 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:42:02,913 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:42:02,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:42:02,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:42:02,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:42:02,916 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:42:02,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:42:02,916 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:42:02,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:42:02,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:42:02,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:42:02,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:42:02,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:42:02,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:42:02,919 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:42:02,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:42:02,919 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:42:02,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:42:02,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:42:02,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:42:02,920 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:42:02,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:42:02,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:42:02,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:42:02,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:42:02,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:42:02,922 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:42:02,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:42:02,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:42:02,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:42:02,923 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_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4be225ddf5726de15d96df20c7b0d434801c413 [2020-11-29 19:42:03,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:42:03,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:42:03,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:42:03,283 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:42:03,285 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:42:03,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/bin/uautomizer/../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2020-11-29 19:42:03,370 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/bin/uautomizer/data/5f93595ba/c2e2bd8efa9b4d9895212188933caaf8/FLAGffee8be3c [2020-11-29 19:42:03,885 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:42:03,889 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2020-11-29 19:42:03,903 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/bin/uautomizer/data/5f93595ba/c2e2bd8efa9b4d9895212188933caaf8/FLAGffee8be3c [2020-11-29 19:42:04,234 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/bin/uautomizer/data/5f93595ba/c2e2bd8efa9b4d9895212188933caaf8 [2020-11-29 19:42:04,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:42:04,239 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:42:04,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:42:04,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:42:04,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:42:04,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:42:04" (1/1) ... [2020-11-29 19:42:04,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e81bbff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:04, skipping insertion in model container [2020-11-29 19:42:04,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:42:04" (1/1) ... [2020-11-29 19:42:04,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:42:04,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:42:04,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:42:04,554 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:42:04,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:42:04,625 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:42:04,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:04 WrapperNode [2020-11-29 19:42:04,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:42:04,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:42:04,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:42:04,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:42:04,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:04" (1/1) ... [2020-11-29 19:42:04,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:04" (1/1) ... [2020-11-29 19:42:04,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:42:04,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:42:04,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:42:04,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:42:04,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:04" (1/1) ... [2020-11-29 19:42:04,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:04" (1/1) ... [2020-11-29 19:42:04,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:04" (1/1) ... [2020-11-29 19:42:04,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:04" (1/1) ... [2020-11-29 19:42:04,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:04" (1/1) ... [2020-11-29 19:42:04,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:04" (1/1) ... [2020-11-29 19:42:04,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:04" (1/1) ... [2020-11-29 19:42:04,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:42:04,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:42:04,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:42:04,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:42:04,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:42:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:42:04,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:42:04,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:42:05,387 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:42:05,388 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 19:42:05,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:42:05 BoogieIcfgContainer [2020-11-29 19:42:05,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:42:05,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:42:05,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:42:05,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:42:05,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:42:04" (1/3) ... [2020-11-29 19:42:05,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30f52969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:42:05, skipping insertion in model container [2020-11-29 19:42:05,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:04" (2/3) ... [2020-11-29 19:42:05,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30f52969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:42:05, skipping insertion in model container [2020-11-29 19:42:05,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:42:05" (3/3) ... [2020-11-29 19:42:05,402 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2020-11-29 19:42:05,419 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:42:05,424 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:42:05,437 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 19:42:05,460 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:42:05,460 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:42:05,460 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:42:05,461 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:42:05,461 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:42:05,461 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:42:05,461 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:42:05,461 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:42:05,478 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-11-29 19:42:05,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:42:05,484 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:05,485 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] [2020-11-29 19:42:05,485 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:05,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:05,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1824896950, now seen corresponding path program 1 times [2020-11-29 19:42:05,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:05,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195573772] [2020-11-29 19:42:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:05,696 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 19:42:05,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195573772] [2020-11-29 19:42:05,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:42:05,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:42:05,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046001260] [2020-11-29 19:42:05,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:42:05,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:05,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:42:05,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:42:05,724 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-11-29 19:42:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:05,923 INFO L93 Difference]: Finished difference Result 53 states and 91 transitions. [2020-11-29 19:42:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:42:05,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-29 19:42:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:05,937 INFO L225 Difference]: With dead ends: 53 [2020-11-29 19:42:05,937 INFO L226 Difference]: Without dead ends: 25 [2020-11-29 19:42:05,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:42:05,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-29 19:42:05,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-29 19:42:05,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-29 19:42:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2020-11-29 19:42:05,993 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 23 [2020-11-29 19:42:05,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:05,994 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-11-29 19:42:05,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:42:05,995 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2020-11-29 19:42:05,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:42:05,996 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:05,996 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] [2020-11-29 19:42:05,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:42:05,997 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:05,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:05,999 INFO L82 PathProgramCache]: Analyzing trace with hash -40254331, now seen corresponding path program 1 times [2020-11-29 19:42:05,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:06,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267719259] [2020-11-29 19:42:06,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:06,103 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 19:42:06,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267719259] [2020-11-29 19:42:06,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:42:06,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:42:06,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894973158] [2020-11-29 19:42:06,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:42:06,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:06,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:42:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:42:06,107 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 4 states. [2020-11-29 19:42:06,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:06,331 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2020-11-29 19:42:06,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:42:06,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-29 19:42:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:06,333 INFO L225 Difference]: With dead ends: 44 [2020-11-29 19:42:06,333 INFO L226 Difference]: Without dead ends: 25 [2020-11-29 19:42:06,334 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 19:42:06,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-29 19:42:06,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-29 19:42:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-29 19:42:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2020-11-29 19:42:06,339 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 23 [2020-11-29 19:42:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:06,343 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2020-11-29 19:42:06,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:42:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2020-11-29 19:42:06,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:42:06,345 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:06,345 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] [2020-11-29 19:42:06,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 19:42:06,347 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:06,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:06,348 INFO L82 PathProgramCache]: Analyzing trace with hash 882733161, now seen corresponding path program 1 times [2020-11-29 19:42:06,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:06,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857913144] [2020-11-29 19:42:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:06,434 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 19:42:06,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857913144] [2020-11-29 19:42:06,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:42:06,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:42:06,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450458460] [2020-11-29 19:42:06,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:42:06,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:06,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:42:06,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:42:06,436 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 3 states. [2020-11-29 19:42:06,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:06,619 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2020-11-29 19:42:06,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:42:06,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-29 19:42:06,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:06,621 INFO L225 Difference]: With dead ends: 54 [2020-11-29 19:42:06,622 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 19:42:06,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:42:06,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 19:42:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-29 19:42:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-29 19:42:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-11-29 19:42:06,630 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 23 [2020-11-29 19:42:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:06,631 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-11-29 19:42:06,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:42:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-11-29 19:42:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:42:06,632 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:06,632 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] [2020-11-29 19:42:06,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 19:42:06,633 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:06,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1262496480, now seen corresponding path program 1 times [2020-11-29 19:42:06,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:06,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072219074] [2020-11-29 19:42:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:06,837 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 19:42:06,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072219074] [2020-11-29 19:42:06,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:42:06,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 19:42:06,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809425960] [2020-11-29 19:42:06,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:42:06,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:06,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:42:06,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:42:06,840 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 6 states. [2020-11-29 19:42:07,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:07,018 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-11-29 19:42:07,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:42:07,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-11-29 19:42:07,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:07,020 INFO L225 Difference]: With dead ends: 52 [2020-11-29 19:42:07,020 INFO L226 Difference]: Without dead ends: 35 [2020-11-29 19:42:07,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:42:07,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-29 19:42:07,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-29 19:42:07,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-29 19:42:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2020-11-29 19:42:07,027 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 23 [2020-11-29 19:42:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:07,027 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2020-11-29 19:42:07,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:42:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2020-11-29 19:42:07,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:42:07,029 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:07,029 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] [2020-11-29 19:42:07,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 19:42:07,029 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:07,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:07,030 INFO L82 PathProgramCache]: Analyzing trace with hash -542236975, now seen corresponding path program 1 times [2020-11-29 19:42:07,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:07,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650943389] [2020-11-29 19:42:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:07,131 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 19:42:07,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650943389] [2020-11-29 19:42:07,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:42:07,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-29 19:42:07,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94150256] [2020-11-29 19:42:07,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:42:07,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:07,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:42:07,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:42:07,133 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 8 states. [2020-11-29 19:42:07,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:07,324 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-11-29 19:42:07,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:42:07,328 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-11-29 19:42:07,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:07,329 INFO L225 Difference]: With dead ends: 44 [2020-11-29 19:42:07,329 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 19:42:07,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 19:42:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 19:42:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-29 19:42:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 19:42:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-11-29 19:42:07,335 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2020-11-29 19:42:07,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:07,335 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-11-29 19:42:07,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:42:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-11-29 19:42:07,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:42:07,342 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:07,343 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] [2020-11-29 19:42:07,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 19:42:07,343 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:07,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:07,344 INFO L82 PathProgramCache]: Analyzing trace with hash -218545361, now seen corresponding path program 1 times [2020-11-29 19:42:07,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:07,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440104896] [2020-11-29 19:42:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:07,415 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 19:42:07,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440104896] [2020-11-29 19:42:07,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:42:07,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:42:07,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417589806] [2020-11-29 19:42:07,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:42:07,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:07,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:42:07,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:42:07,417 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 3 states. [2020-11-29 19:42:07,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:07,484 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-11-29 19:42:07,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:42:07,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-29 19:42:07,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:07,486 INFO L225 Difference]: With dead ends: 34 [2020-11-29 19:42:07,486 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 19:42:07,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:42:07,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 19:42:07,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-29 19:42:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 19:42:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-11-29 19:42:07,492 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2020-11-29 19:42:07,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:07,492 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-11-29 19:42:07,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:42:07,493 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-11-29 19:42:07,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:42:07,493 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:07,494 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] [2020-11-29 19:42:07,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 19:42:07,494 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:07,495 INFO L82 PathProgramCache]: Analyzing trace with hash -217860168, now seen corresponding path program 1 times [2020-11-29 19:42:07,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:07,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624671640] [2020-11-29 19:42:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:07,681 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 19:42:07,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624671640] [2020-11-29 19:42:07,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:42:07,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-29 19:42:07,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75247831] [2020-11-29 19:42:07,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 19:42:07,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:07,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:42:07,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:42:07,683 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 11 states. [2020-11-29 19:42:07,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:07,830 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-11-29 19:42:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 19:42:07,831 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-11-29 19:42:07,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:07,831 INFO L225 Difference]: With dead ends: 36 [2020-11-29 19:42:07,831 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 19:42:07,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 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 19:42:07,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 19:42:07,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 19:42:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 19:42:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-29 19:42:07,837 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2020-11-29 19:42:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:07,837 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-29 19:42:07,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 19:42:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-29 19:42:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 19:42:07,838 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:07,838 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] [2020-11-29 19:42:07,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 19:42:07,839 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:07,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:07,839 INFO L82 PathProgramCache]: Analyzing trace with hash 423767145, now seen corresponding path program 1 times [2020-11-29 19:42:07,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:07,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135953118] [2020-11-29 19:42:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:42:08,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135953118] [2020-11-29 19:42:08,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:42:08,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-29 19:42:08,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534808304] [2020-11-29 19:42:08,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 19:42:08,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:08,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 19:42:08,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:42:08,014 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2020-11-29 19:42:08,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:08,181 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-11-29 19:42:08,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 19:42:08,181 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-11-29 19:42:08,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:08,188 INFO L225 Difference]: With dead ends: 34 [2020-11-29 19:42:08,188 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 19:42:08,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 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 19:42:08,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 19:42:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-29 19:42:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 19:42:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-11-29 19:42:08,193 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2020-11-29 19:42:08,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:08,193 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-11-29 19:42:08,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 19:42:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-11-29 19:42:08,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 19:42:08,194 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:08,195 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-29 19:42:08,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 19:42:08,195 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:08,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:08,200 INFO L82 PathProgramCache]: Analyzing trace with hash -875092666, now seen corresponding path program 1 times [2020-11-29 19:42:08,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:08,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827394339] [2020-11-29 19:42:08,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:42:08,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827394339] [2020-11-29 19:42:08,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064736226] [2020-11-29 19:42:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:08,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 19:42:08,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:42:08,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:08,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-29 19:42:08,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946558419] [2020-11-29 19:42:08,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 19:42:08,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:08,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 19:42:08,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:42:08,672 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 14 states. [2020-11-29 19:42:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:08,856 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-11-29 19:42:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 19:42:08,862 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-11-29 19:42:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:08,863 INFO L225 Difference]: With dead ends: 36 [2020-11-29 19:42:08,863 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 19:42:08,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:42:08,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 19:42:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-29 19:42:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 19:42:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-11-29 19:42:08,868 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2020-11-29 19:42:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:08,868 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-11-29 19:42:08,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 19:42:08,869 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-11-29 19:42:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 19:42:08,869 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:08,870 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-11-29 19:42:09,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 19:42:09,096 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:09,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:09,096 INFO L82 PathProgramCache]: Analyzing trace with hash 756112099, now seen corresponding path program 2 times [2020-11-29 19:42:09,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:09,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101269635] [2020-11-29 19:42:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:42:09,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101269635] [2020-11-29 19:42:09,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720559744] [2020-11-29 19:42:09,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:09,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:42:09,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:09,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 19:42:09,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:42:09,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:09,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-29 19:42:09,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229112274] [2020-11-29 19:42:09,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 19:42:09,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:09,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 19:42:09,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:42:09,436 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 15 states. [2020-11-29 19:42:09,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:09,595 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-11-29 19:42:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 19:42:09,596 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-11-29 19:42:09,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:09,597 INFO L225 Difference]: With dead ends: 38 [2020-11-29 19:42:09,597 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 19:42:09,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:42:09,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 19:42:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-29 19:42:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-29 19:42:09,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-11-29 19:42:09,602 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2020-11-29 19:42:09,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:09,602 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-11-29 19:42:09,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 19:42:09,602 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-11-29 19:42:09,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 19:42:09,603 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:09,603 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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 19:42:09,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-29 19:42:09,820 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:09,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:09,820 INFO L82 PathProgramCache]: Analyzing trace with hash 680828224, now seen corresponding path program 3 times [2020-11-29 19:42:09,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:09,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377601029] [2020-11-29 19:42:09,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:42:10,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377601029] [2020-11-29 19:42:10,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676549648] [2020-11-29 19:42:10,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:10,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 19:42:10,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:10,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:42:10,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 19:42:10,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:10,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4] total 17 [2020-11-29 19:42:10,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104564987] [2020-11-29 19:42:10,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 19:42:10,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:10,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 19:42:10,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-29 19:42:10,236 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-11-29 19:42:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:10,394 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-11-29 19:42:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 19:42:10,394 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-11-29 19:42:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:10,395 INFO L225 Difference]: With dead ends: 42 [2020-11-29 19:42:10,395 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 19:42:10,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 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 19:42:10,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 19:42:10,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-11-29 19:42:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 19:42:10,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-11-29 19:42:10,400 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-11-29 19:42:10,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:10,400 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-11-29 19:42:10,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 19:42:10,400 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-11-29 19:42:10,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 19:42:10,401 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:10,401 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 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 19:42:10,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-29 19:42:10,616 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:10,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:10,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2124419607, now seen corresponding path program 4 times [2020-11-29 19:42:10,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:10,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060094799] [2020-11-29 19:42:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:42:10,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060094799] [2020-11-29 19:42:10,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475391624] [2020-11-29 19:42:10,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:10,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:42:10,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:10,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 19:42:10,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:42:11,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:11,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-29 19:42:11,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788012927] [2020-11-29 19:42:11,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 19:42:11,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:11,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 19:42:11,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-29 19:42:11,016 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 17 states. [2020-11-29 19:42:11,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:11,139 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-11-29 19:42:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 19:42:11,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-11-29 19:42:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:11,141 INFO L225 Difference]: With dead ends: 44 [2020-11-29 19:42:11,141 INFO L226 Difference]: Without dead ends: 38 [2020-11-29 19:42:11,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-29 19:42:11,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-29 19:42:11,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-29 19:42:11,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-29 19:42:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-11-29 19:42:11,154 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-11-29 19:42:11,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:11,155 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-11-29 19:42:11,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 19:42:11,155 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-11-29 19:42:11,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 19:42:11,156 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:11,156 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 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 19:42:11,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:42:11,372 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:11,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:11,372 INFO L82 PathProgramCache]: Analyzing trace with hash 516774580, now seen corresponding path program 5 times [2020-11-29 19:42:11,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:11,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986749976] [2020-11-29 19:42:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:42:11,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986749976] [2020-11-29 19:42:11,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101690521] [2020-11-29 19:42:11,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:11,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-29 19:42:11,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:11,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:42:11,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 19:42:11,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:11,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2020-11-29 19:42:11,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432623633] [2020-11-29 19:42:11,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 19:42:11,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:11,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 19:42:11,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-29 19:42:11,939 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 21 states. [2020-11-29 19:42:12,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:12,117 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-11-29 19:42:12,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 19:42:12,117 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-11-29 19:42:12,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:12,118 INFO L225 Difference]: With dead ends: 51 [2020-11-29 19:42:12,118 INFO L226 Difference]: Without dead ends: 45 [2020-11-29 19:42:12,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-29 19:42:12,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-29 19:42:12,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-11-29 19:42:12,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-29 19:42:12,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-11-29 19:42:12,124 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 37 [2020-11-29 19:42:12,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:12,124 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-11-29 19:42:12,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 19:42:12,125 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-11-29 19:42:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-29 19:42:12,125 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:12,126 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 4, 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 19:42:12,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 19:42:12,340 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:12,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:12,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2055346949, now seen corresponding path program 6 times [2020-11-29 19:42:12,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:12,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352201728] [2020-11-29 19:42:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-29 19:42:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352201728] [2020-11-29 19:42:12,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500411227] [2020-11-29 19:42:12,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:12,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-29 19:42:12,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:12,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 19:42:12,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-29 19:42:12,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:12,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-29 19:42:12,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343590564] [2020-11-29 19:42:12,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 19:42:12,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:12,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 19:42:12,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-11-29 19:42:12,741 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 19 states. [2020-11-29 19:42:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:12,910 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-11-29 19:42:12,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 19:42:12,911 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-11-29 19:42:12,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:12,912 INFO L225 Difference]: With dead ends: 56 [2020-11-29 19:42:12,912 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 19:42:12,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-11-29 19:42:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 19:42:12,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-11-29 19:42:12,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-29 19:42:12,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-11-29 19:42:12,917 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2020-11-29 19:42:12,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:12,917 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-11-29 19:42:12,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 19:42:12,917 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-11-29 19:42:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-29 19:42:12,918 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:12,918 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 4, 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 19:42:13,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:42:13,140 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:13,140 INFO L82 PathProgramCache]: Analyzing trace with hash -891324766, now seen corresponding path program 7 times [2020-11-29 19:42:13,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:13,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293695904] [2020-11-29 19:42:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-29 19:42:13,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293695904] [2020-11-29 19:42:13,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141209946] [2020-11-29 19:42:13,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:13,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 19:42:13,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-29 19:42:13,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:13,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-29 19:42:13,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526809169] [2020-11-29 19:42:13,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 19:42:13,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:13,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 19:42:13,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-29 19:42:13,549 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 20 states. [2020-11-29 19:42:13,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:13,667 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-11-29 19:42:13,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 19:42:13,667 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-11-29 19:42:13,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:13,668 INFO L225 Difference]: With dead ends: 58 [2020-11-29 19:42:13,668 INFO L226 Difference]: Without dead ends: 48 [2020-11-29 19:42:13,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-29 19:42:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-29 19:42:13,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-11-29 19:42:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 19:42:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-11-29 19:42:13,674 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2020-11-29 19:42:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:13,674 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-11-29 19:42:13,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 19:42:13,674 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-11-29 19:42:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-29 19:42:13,675 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:13,675 INFO L422 BasicCegarLoop]: trace histogram [12, 8, 4, 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 19:42:13,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 19:42:13,892 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:13,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:13,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2035572479, now seen corresponding path program 8 times [2020-11-29 19:42:13,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:13,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143038619] [2020-11-29 19:42:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-29 19:42:14,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143038619] [2020-11-29 19:42:14,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891729475] [2020-11-29 19:42:14,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:14,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:42:14,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:14,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:42:14,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-11-29 19:42:14,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:14,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2020-11-29 19:42:14,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112793624] [2020-11-29 19:42:14,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-29 19:42:14,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:14,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-29 19:42:14,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-11-29 19:42:14,489 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 26 states. [2020-11-29 19:42:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:14,673 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2020-11-29 19:42:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-29 19:42:14,674 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 47 [2020-11-29 19:42:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:14,675 INFO L225 Difference]: With dead ends: 65 [2020-11-29 19:42:14,675 INFO L226 Difference]: Without dead ends: 55 [2020-11-29 19:42:14,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-11-29 19:42:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-29 19:42:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-11-29 19:42:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-29 19:42:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-11-29 19:42:14,681 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 47 [2020-11-29 19:42:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:14,682 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-11-29 19:42:14,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-29 19:42:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-11-29 19:42:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-29 19:42:14,683 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:14,683 INFO L422 BasicCegarLoop]: trace histogram [15, 9, 6, 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 19:42:14,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 19:42:14,900 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:14,900 INFO L82 PathProgramCache]: Analyzing trace with hash 512283024, now seen corresponding path program 9 times [2020-11-29 19:42:14,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:14,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112375506] [2020-11-29 19:42:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-29 19:42:15,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112375506] [2020-11-29 19:42:15,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874410872] [2020-11-29 19:42:15,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:15,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-11-29 19:42:15,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:15,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:42:15,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-11-29 19:42:15,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:15,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2020-11-29 19:42:15,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834843783] [2020-11-29 19:42:15,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-29 19:42:15,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:15,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-29 19:42:15,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-11-29 19:42:15,551 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 28 states. [2020-11-29 19:42:15,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:15,793 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2020-11-29 19:42:15,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-29 19:42:15,793 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 53 [2020-11-29 19:42:15,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:15,794 INFO L225 Difference]: With dead ends: 73 [2020-11-29 19:42:15,794 INFO L226 Difference]: Without dead ends: 59 [2020-11-29 19:42:15,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-11-29 19:42:15,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-29 19:42:15,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-11-29 19:42:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-29 19:42:15,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-11-29 19:42:15,801 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2020-11-29 19:42:15,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:15,801 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-11-29 19:42:15,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-29 19:42:15,802 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-11-29 19:42:15,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-29 19:42:15,802 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:15,803 INFO L422 BasicCegarLoop]: trace histogram [17, 10, 7, 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 19:42:16,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 19:42:16,028 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:16,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:16,028 INFO L82 PathProgramCache]: Analyzing trace with hash 632258215, now seen corresponding path program 10 times [2020-11-29 19:42:16,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:16,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016230595] [2020-11-29 19:42:16,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-29 19:42:16,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016230595] [2020-11-29 19:42:16,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648356802] [2020-11-29 19:42:16,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:16,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:42:16,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:16,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 19:42:16,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-29 19:42:16,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:16,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-29 19:42:16,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000377212] [2020-11-29 19:42:16,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 19:42:16,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:16,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 19:42:16,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-11-29 19:42:16,568 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 23 states. [2020-11-29 19:42:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:16,697 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-11-29 19:42:16,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 19:42:16,698 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-11-29 19:42:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:16,699 INFO L225 Difference]: With dead ends: 76 [2020-11-29 19:42:16,699 INFO L226 Difference]: Without dead ends: 60 [2020-11-29 19:42:16,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-11-29 19:42:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-29 19:42:16,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-11-29 19:42:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 19:42:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-11-29 19:42:16,705 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2020-11-29 19:42:16,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:16,705 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-11-29 19:42:16,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 19:42:16,705 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-11-29 19:42:16,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-29 19:42:16,706 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:16,706 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 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 19:42:16,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 19:42:16,922 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:16,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:16,923 INFO L82 PathProgramCache]: Analyzing trace with hash 698467204, now seen corresponding path program 11 times [2020-11-29 19:42:16,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:16,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522446270] [2020-11-29 19:42:16,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-29 19:42:17,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522446270] [2020-11-29 19:42:17,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589876640] [2020-11-29 19:42:17,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:17,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-11-29 19:42:17,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:17,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 19:42:17,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 81 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-11-29 19:42:17,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:17,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2020-11-29 19:42:17,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333224874] [2020-11-29 19:42:17,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-29 19:42:17,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:17,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-29 19:42:17,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 19:42:17,828 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 33 states. [2020-11-29 19:42:18,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:18,078 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-11-29 19:42:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-29 19:42:18,078 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 59 [2020-11-29 19:42:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:18,079 INFO L225 Difference]: With dead ends: 85 [2020-11-29 19:42:18,079 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 19:42:18,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 19:42:18,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 19:42:18,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-11-29 19:42:18,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 19:42:18,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-11-29 19:42:18,085 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 59 [2020-11-29 19:42:18,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:18,085 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-11-29 19:42:18,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-29 19:42:18,086 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-11-29 19:42:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-29 19:42:18,086 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:18,086 INFO L422 BasicCegarLoop]: trace histogram [22, 12, 10, 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 19:42:18,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:42:18,287 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:18,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:18,287 INFO L82 PathProgramCache]: Analyzing trace with hash -821055537, now seen corresponding path program 12 times [2020-11-29 19:42:18,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:18,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464962943] [2020-11-29 19:42:18,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 247 proven. 156 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-29 19:42:18,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464962943] [2020-11-29 19:42:18,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057190634] [2020-11-29 19:42:18,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:18,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-11-29 19:42:18,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:18,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 19:42:18,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 247 proven. 156 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-29 19:42:18,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:18,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-29 19:42:18,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775734190] [2020-11-29 19:42:18,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-29 19:42:18,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-29 19:42:18,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-11-29 19:42:18,799 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 25 states. [2020-11-29 19:42:18,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:18,939 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-11-29 19:42:18,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 19:42:18,940 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 67 [2020-11-29 19:42:18,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:18,941 INFO L225 Difference]: With dead ends: 92 [2020-11-29 19:42:18,941 INFO L226 Difference]: Without dead ends: 70 [2020-11-29 19:42:18,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-11-29 19:42:18,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-29 19:42:18,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-11-29 19:42:18,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-29 19:42:18,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-11-29 19:42:18,948 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2020-11-29 19:42:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:18,948 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-11-29 19:42:18,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-29 19:42:18,948 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-11-29 19:42:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-11-29 19:42:18,949 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:18,949 INFO L422 BasicCegarLoop]: trace histogram [23, 13, 10, 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 19:42:19,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:42:19,150 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:19,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:19,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1433093228, now seen corresponding path program 13 times [2020-11-29 19:42:19,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:19,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701510983] [2020-11-29 19:42:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-29 19:42:19,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701510983] [2020-11-29 19:42:19,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908807125] [2020-11-29 19:42:19,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:19,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 19:42:19,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-29 19:42:19,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:19,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-29 19:42:19,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849801498] [2020-11-29 19:42:19,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-29 19:42:19,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:19,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-29 19:42:19,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-11-29 19:42:19,691 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 26 states. [2020-11-29 19:42:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:19,883 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-11-29 19:42:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-29 19:42:19,883 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 69 [2020-11-29 19:42:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:19,884 INFO L225 Difference]: With dead ends: 94 [2020-11-29 19:42:19,884 INFO L226 Difference]: Without dead ends: 72 [2020-11-29 19:42:19,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-11-29 19:42:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-29 19:42:19,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-11-29 19:42:19,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 19:42:19,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-11-29 19:42:19,889 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2020-11-29 19:42:19,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:19,889 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-11-29 19:42:19,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-29 19:42:19,889 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-11-29 19:42:19,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-29 19:42:19,890 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:19,890 INFO L422 BasicCegarLoop]: trace histogram [24, 14, 10, 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 19:42:20,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-29 19:42:20,112 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:20,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1288428087, now seen corresponding path program 14 times [2020-11-29 19:42:20,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:20,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725938359] [2020-11-29 19:42:20,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 285 proven. 210 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-29 19:42:20,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725938359] [2020-11-29 19:42:20,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404167249] [2020-11-29 19:42:20,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:20,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:42:20,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:20,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-29 19:42:20,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 285 proven. 210 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-29 19:42:20,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:20,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-29 19:42:20,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143567978] [2020-11-29 19:42:20,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-29 19:42:20,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:20,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-29 19:42:20,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-11-29 19:42:20,745 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 27 states. [2020-11-29 19:42:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:20,888 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-11-29 19:42:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-29 19:42:20,890 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-11-29 19:42:20,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:20,891 INFO L225 Difference]: With dead ends: 96 [2020-11-29 19:42:20,891 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 19:42:20,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-11-29 19:42:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 19:42:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-11-29 19:42:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-29 19:42:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-11-29 19:42:20,900 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 71 [2020-11-29 19:42:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:20,900 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-11-29 19:42:20,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-29 19:42:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-11-29 19:42:20,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-29 19:42:20,901 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:20,902 INFO L422 BasicCegarLoop]: trace histogram [25, 15, 10, 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 19:42:21,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:42:21,128 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:21,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:21,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1035328538, now seen corresponding path program 15 times [2020-11-29 19:42:21,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:21,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554364420] [2020-11-29 19:42:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 304 proven. 240 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-29 19:42:21,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554364420] [2020-11-29 19:42:21,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033969943] [2020-11-29 19:42:21,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:21,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-11-29 19:42:21,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:21,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 19:42:21,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 315 proven. 100 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-11-29 19:42:22,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:22,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2020-11-29 19:42:22,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459711699] [2020-11-29 19:42:22,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-29 19:42:22,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:22,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-29 19:42:22,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 19:42:22,215 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 38 states. [2020-11-29 19:42:22,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:22,458 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2020-11-29 19:42:22,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-29 19:42:22,459 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 73 [2020-11-29 19:42:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:22,460 INFO L225 Difference]: With dead ends: 101 [2020-11-29 19:42:22,460 INFO L226 Difference]: Without dead ends: 79 [2020-11-29 19:42:22,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 19:42:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-29 19:42:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-11-29 19:42:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-29 19:42:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-11-29 19:42:22,465 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 73 [2020-11-29 19:42:22,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:22,465 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-11-29 19:42:22,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-29 19:42:22,465 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-11-29 19:42:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-29 19:42:22,466 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:22,466 INFO L422 BasicCegarLoop]: trace histogram [27, 16, 11, 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 19:42:22,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-29 19:42:22,667 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:22,667 INFO L82 PathProgramCache]: Analyzing trace with hash -782408963, now seen corresponding path program 16 times [2020-11-29 19:42:22,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:22,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441650573] [2020-11-29 19:42:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-29 19:42:23,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441650573] [2020-11-29 19:42:23,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699816523] [2020-11-29 19:42:23,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:23,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:42:23,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:23,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 19:42:23,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-29 19:42:23,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:23,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-29 19:42:23,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410338658] [2020-11-29 19:42:23,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-29 19:42:23,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:23,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-29 19:42:23,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-11-29 19:42:23,233 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 29 states. [2020-11-29 19:42:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:23,422 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-11-29 19:42:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-29 19:42:23,423 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 77 [2020-11-29 19:42:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:23,423 INFO L225 Difference]: With dead ends: 104 [2020-11-29 19:42:23,423 INFO L226 Difference]: Without dead ends: 80 [2020-11-29 19:42:23,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-11-29 19:42:23,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-29 19:42:23,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-11-29 19:42:23,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-29 19:42:23,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-11-29 19:42:23,428 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 77 [2020-11-29 19:42:23,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:23,428 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-11-29 19:42:23,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-29 19:42:23,428 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-11-29 19:42:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-29 19:42:23,429 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:23,429 INFO L422 BasicCegarLoop]: trace histogram [28, 17, 11, 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 19:42:23,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:42:23,629 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:23,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:23,630 INFO L82 PathProgramCache]: Analyzing trace with hash -376334502, now seen corresponding path program 17 times [2020-11-29 19:42:23,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:23,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575228807] [2020-11-29 19:42:23,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 378 proven. 306 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-29 19:42:24,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575228807] [2020-11-29 19:42:24,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033709367] [2020-11-29 19:42:24,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:24,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-11-29 19:42:24,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:24,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 19:42:24,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 405 proven. 169 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-11-29 19:42:24,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:24,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16] total 43 [2020-11-29 19:42:24,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042758819] [2020-11-29 19:42:24,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-29 19:42:24,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:24,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-29 19:42:25,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-11-29 19:42:25,000 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 43 states. [2020-11-29 19:42:25,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:25,235 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-11-29 19:42:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-29 19:42:25,235 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 79 [2020-11-29 19:42:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:25,236 INFO L225 Difference]: With dead ends: 113 [2020-11-29 19:42:25,236 INFO L226 Difference]: Without dead ends: 89 [2020-11-29 19:42:25,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-11-29 19:42:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-29 19:42:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-11-29 19:42:25,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-29 19:42:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-11-29 19:42:25,240 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 79 [2020-11-29 19:42:25,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:25,241 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-11-29 19:42:25,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-29 19:42:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-11-29 19:42:25,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-29 19:42:25,242 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:25,242 INFO L422 BasicCegarLoop]: trace histogram [32, 18, 14, 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 19:42:25,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-29 19:42:25,452 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:25,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:25,452 INFO L82 PathProgramCache]: Analyzing trace with hash -467322203, now seen corresponding path program 18 times [2020-11-29 19:42:25,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:25,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953797120] [2020-11-29 19:42:25,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 513 proven. 342 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-11-29 19:42:26,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953797120] [2020-11-29 19:42:26,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843207581] [2020-11-29 19:42:26,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:26,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2020-11-29 19:42:26,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:26,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 19:42:26,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 256 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-11-29 19:42:27,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:27,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 19] total 47 [2020-11-29 19:42:27,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317349001] [2020-11-29 19:42:27,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-29 19:42:27,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:27,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-29 19:42:27,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-11-29 19:42:27,063 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 47 states. [2020-11-29 19:42:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:27,312 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2020-11-29 19:42:27,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-29 19:42:27,313 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 87 [2020-11-29 19:42:27,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:27,314 INFO L225 Difference]: With dead ends: 127 [2020-11-29 19:42:27,314 INFO L226 Difference]: Without dead ends: 97 [2020-11-29 19:42:27,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-11-29 19:42:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-29 19:42:27,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-11-29 19:42:27,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-29 19:42:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-11-29 19:42:27,319 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 87 [2020-11-29 19:42:27,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:27,319 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-11-29 19:42:27,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-29 19:42:27,319 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-11-29 19:42:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-29 19:42:27,320 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:27,320 INFO L422 BasicCegarLoop]: trace histogram [36, 19, 17, 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 19:42:27,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-29 19:42:27,521 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash 319507632, now seen corresponding path program 19 times [2020-11-29 19:42:27,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:27,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605076592] [2020-11-29 19:42:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 660 proven. 380 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-11-29 19:42:28,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605076592] [2020-11-29 19:42:28,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183805122] [2020-11-29 19:42:28,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:28,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 19:42:28,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 660 proven. 380 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-11-29 19:42:28,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:28,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-29 19:42:28,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608468889] [2020-11-29 19:42:28,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-29 19:42:28,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:28,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-29 19:42:28,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-11-29 19:42:28,161 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 32 states. [2020-11-29 19:42:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:28,342 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2020-11-29 19:42:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-29 19:42:28,343 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 95 [2020-11-29 19:42:28,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:28,344 INFO L225 Difference]: With dead ends: 134 [2020-11-29 19:42:28,344 INFO L226 Difference]: Without dead ends: 98 [2020-11-29 19:42:28,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-11-29 19:42:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-29 19:42:28,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-11-29 19:42:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-29 19:42:28,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-11-29 19:42:28,349 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 95 [2020-11-29 19:42:28,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:28,350 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-11-29 19:42:28,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-29 19:42:28,350 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-11-29 19:42:28,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-29 19:42:28,351 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:28,351 INFO L422 BasicCegarLoop]: trace histogram [37, 20, 17, 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 19:42:28,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-29 19:42:28,551 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:28,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:28,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1493173197, now seen corresponding path program 20 times [2020-11-29 19:42:28,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:28,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273769738] [2020-11-29 19:42:28,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 693 proven. 420 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-11-29 19:42:29,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273769738] [2020-11-29 19:42:29,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196158847] [2020-11-29 19:42:29,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:29,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:42:29,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:29,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 19:42:29,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 693 proven. 420 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-11-29 19:42:29,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:29,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-29 19:42:29,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366067499] [2020-11-29 19:42:29,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-29 19:42:29,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:29,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-29 19:42:29,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 19:42:29,427 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 33 states. [2020-11-29 19:42:29,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:29,596 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2020-11-29 19:42:29,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-29 19:42:29,597 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2020-11-29 19:42:29,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:29,598 INFO L225 Difference]: With dead ends: 136 [2020-11-29 19:42:29,598 INFO L226 Difference]: Without dead ends: 100 [2020-11-29 19:42:29,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 19:42:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-29 19:42:29,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-11-29 19:42:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-29 19:42:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-11-29 19:42:29,603 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 97 [2020-11-29 19:42:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:29,604 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-11-29 19:42:29,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-29 19:42:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-11-29 19:42:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-11-29 19:42:29,605 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:29,606 INFO L422 BasicCegarLoop]: trace histogram [38, 21, 17, 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 19:42:29,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-29 19:42:29,824 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:29,824 INFO L82 PathProgramCache]: Analyzing trace with hash -190617686, now seen corresponding path program 21 times [2020-11-29 19:42:29,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:29,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964451757] [2020-11-29 19:42:29,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 726 proven. 462 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-11-29 19:42:30,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964451757] [2020-11-29 19:42:30,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771007621] [2020-11-29 19:42:30,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:30,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2020-11-29 19:42:30,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:30,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 19:42:30,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 735 proven. 289 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-11-29 19:42:31,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:31,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 20] total 51 [2020-11-29 19:42:31,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27964937] [2020-11-29 19:42:31,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-11-29 19:42:31,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:31,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-11-29 19:42:31,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-11-29 19:42:31,525 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 51 states. [2020-11-29 19:42:31,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:31,844 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2020-11-29 19:42:31,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-29 19:42:31,844 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 99 [2020-11-29 19:42:31,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:31,845 INFO L225 Difference]: With dead ends: 141 [2020-11-29 19:42:31,845 INFO L226 Difference]: Without dead ends: 105 [2020-11-29 19:42:31,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-11-29 19:42:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-11-29 19:42:31,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-11-29 19:42:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-11-29 19:42:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-11-29 19:42:31,854 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 99 [2020-11-29 19:42:31,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:31,854 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-11-29 19:42:31,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-11-29 19:42:31,854 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-11-29 19:42:31,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-29 19:42:31,856 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:31,856 INFO L422 BasicCegarLoop]: trace histogram [40, 22, 18, 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 19:42:32,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-29 19:42:32,080 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:32,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:32,080 INFO L82 PathProgramCache]: Analyzing trace with hash -363246719, now seen corresponding path program 22 times [2020-11-29 19:42:32,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:32,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99454051] [2020-11-29 19:42:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 805 proven. 506 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-11-29 19:42:32,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99454051] [2020-11-29 19:42:32,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543811137] [2020-11-29 19:42:32,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:32,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:42:32,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:32,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-29 19:42:32,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 805 proven. 506 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-11-29 19:42:32,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:32,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-29 19:42:32,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245477584] [2020-11-29 19:42:32,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-29 19:42:32,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:32,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-29 19:42:32,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-11-29 19:42:32,824 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 35 states. [2020-11-29 19:42:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:32,992 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-11-29 19:42:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-29 19:42:32,993 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-11-29 19:42:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:32,994 INFO L225 Difference]: With dead ends: 144 [2020-11-29 19:42:32,994 INFO L226 Difference]: Without dead ends: 106 [2020-11-29 19:42:32,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-11-29 19:42:32,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-29 19:42:33,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-11-29 19:42:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-29 19:42:33,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-11-29 19:42:33,001 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 103 [2020-11-29 19:42:33,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:33,002 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-11-29 19:42:33,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-29 19:42:33,002 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-11-29 19:42:33,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-29 19:42:33,003 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:33,003 INFO L422 BasicCegarLoop]: trace histogram [41, 23, 18, 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 19:42:33,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:42:33,215 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1285057122, now seen corresponding path program 23 times [2020-11-29 19:42:33,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:33,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683130261] [2020-11-29 19:42:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 840 proven. 552 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-11-29 19:42:33,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683130261] [2020-11-29 19:42:33,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954258179] [2020-11-29 19:42:33,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:33,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-11-29 19:42:33,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:33,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 19:42:33,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 400 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-11-29 19:42:34,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:34,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 23] total 56 [2020-11-29 19:42:34,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644236981] [2020-11-29 19:42:34,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-29 19:42:34,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:34,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-29 19:42:34,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-11-29 19:42:34,828 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 56 states. [2020-11-29 19:42:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:35,091 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2020-11-29 19:42:35,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-29 19:42:35,092 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 105 [2020-11-29 19:42:35,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:35,093 INFO L225 Difference]: With dead ends: 153 [2020-11-29 19:42:35,094 INFO L226 Difference]: Without dead ends: 115 [2020-11-29 19:42:35,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-11-29 19:42:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-29 19:42:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-11-29 19:42:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-29 19:42:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-11-29 19:42:35,104 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 105 [2020-11-29 19:42:35,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:35,105 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-11-29 19:42:35,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-29 19:42:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-11-29 19:42:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-11-29 19:42:35,106 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:35,106 INFO L422 BasicCegarLoop]: trace histogram [45, 24, 21, 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 19:42:35,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-29 19:42:35,320 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:35,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:35,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1116419159, now seen corresponding path program 24 times [2020-11-29 19:42:35,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:35,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166756264] [2020-11-29 19:42:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1025 proven. 600 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 19:42:36,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166756264] [2020-11-29 19:42:36,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563594262] [2020-11-29 19:42:36,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:36,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2020-11-29 19:42:36,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:36,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 19:42:36,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1025 proven. 600 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 19:42:36,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:36,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-11-29 19:42:36,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028775702] [2020-11-29 19:42:36,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-29 19:42:36,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:36,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-29 19:42:36,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 19:42:36,248 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 37 states. [2020-11-29 19:42:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:36,461 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2020-11-29 19:42:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-29 19:42:36,462 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 113 [2020-11-29 19:42:36,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:36,462 INFO L225 Difference]: With dead ends: 160 [2020-11-29 19:42:36,462 INFO L226 Difference]: Without dead ends: 116 [2020-11-29 19:42:36,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 19:42:36,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-29 19:42:36,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-11-29 19:42:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-11-29 19:42:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2020-11-29 19:42:36,468 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 113 [2020-11-29 19:42:36,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:36,468 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2020-11-29 19:42:36,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-29 19:42:36,468 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2020-11-29 19:42:36,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-29 19:42:36,469 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:36,469 INFO L422 BasicCegarLoop]: trace histogram [46, 25, 21, 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 19:42:36,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:42:36,684 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:36,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:36,684 INFO L82 PathProgramCache]: Analyzing trace with hash 110548358, now seen corresponding path program 25 times [2020-11-29 19:42:36,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:36,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134878605] [2020-11-29 19:42:36,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1066 proven. 650 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 19:42:37,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134878605] [2020-11-29 19:42:37,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338514782] [2020-11-29 19:42:37,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-29 19:42:37,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1066 proven. 650 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 19:42:37,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:37,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-11-29 19:42:37,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855791165] [2020-11-29 19:42:37,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-29 19:42:37,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:37,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-29 19:42:37,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 19:42:37,471 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 38 states. [2020-11-29 19:42:37,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:37,638 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-11-29 19:42:37,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-29 19:42:37,638 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 115 [2020-11-29 19:42:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:37,639 INFO L225 Difference]: With dead ends: 162 [2020-11-29 19:42:37,639 INFO L226 Difference]: Without dead ends: 118 [2020-11-29 19:42:37,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 19:42:37,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-29 19:42:37,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-11-29 19:42:37,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-11-29 19:42:37,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2020-11-29 19:42:37,645 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 115 [2020-11-29 19:42:37,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:37,645 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2020-11-29 19:42:37,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-29 19:42:37,646 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2020-11-29 19:42:37,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-11-29 19:42:37,646 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:37,647 INFO L422 BasicCegarLoop]: trace histogram [47, 26, 21, 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 19:42:37,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-29 19:42:37,860 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:37,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:37,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1889674205, now seen corresponding path program 26 times [2020-11-29 19:42:37,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:37,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604872915] [2020-11-29 19:42:37,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1107 proven. 702 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 19:42:38,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604872915] [2020-11-29 19:42:38,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062932048] [2020-11-29 19:42:38,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:38,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:42:38,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:38,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-29 19:42:38,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1107 proven. 702 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 19:42:38,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:38,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-11-29 19:42:38,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091509864] [2020-11-29 19:42:38,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-29 19:42:38,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:38,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-29 19:42:38,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-11-29 19:42:38,973 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 39 states. [2020-11-29 19:42:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:39,153 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2020-11-29 19:42:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-29 19:42:39,160 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 117 [2020-11-29 19:42:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:39,161 INFO L225 Difference]: With dead ends: 164 [2020-11-29 19:42:39,161 INFO L226 Difference]: Without dead ends: 120 [2020-11-29 19:42:39,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-11-29 19:42:39,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-29 19:42:39,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-11-29 19:42:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-29 19:42:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2020-11-29 19:42:39,166 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2020-11-29 19:42:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:39,166 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2020-11-29 19:42:39,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-29 19:42:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2020-11-29 19:42:39,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-11-29 19:42:39,167 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:39,167 INFO L422 BasicCegarLoop]: trace histogram [48, 27, 21, 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 19:42:39,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-29 19:42:39,391 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:39,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:39,392 INFO L82 PathProgramCache]: Analyzing trace with hash 41791360, now seen corresponding path program 27 times [2020-11-29 19:42:39,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:39,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249230878] [2020-11-29 19:42:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1148 proven. 756 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 19:42:40,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249230878] [2020-11-29 19:42:40,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105338801] [2020-11-29 19:42:40,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:40,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2020-11-29 19:42:40,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:40,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 19:42:40,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1161 proven. 441 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2020-11-29 19:42:41,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:41,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 24] total 61 [2020-11-29 19:42:41,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133546738] [2020-11-29 19:42:41,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-11-29 19:42:41,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:41,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-11-29 19:42:41,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-11-29 19:42:41,498 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 61 states. [2020-11-29 19:42:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:41,772 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2020-11-29 19:42:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-11-29 19:42:41,774 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 119 [2020-11-29 19:42:41,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:41,774 INFO L225 Difference]: With dead ends: 169 [2020-11-29 19:42:41,774 INFO L226 Difference]: Without dead ends: 125 [2020-11-29 19:42:41,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-11-29 19:42:41,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-11-29 19:42:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-11-29 19:42:41,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-11-29 19:42:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-11-29 19:42:41,781 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2020-11-29 19:42:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:41,781 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-11-29 19:42:41,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-11-29 19:42:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-11-29 19:42:41,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-11-29 19:42:41,782 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:41,782 INFO L422 BasicCegarLoop]: trace histogram [50, 28, 22, 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 19:42:41,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-29 19:42:41,983 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:41,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:41,983 INFO L82 PathProgramCache]: Analyzing trace with hash -948329129, now seen corresponding path program 28 times [2020-11-29 19:42:41,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:41,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040218048] [2020-11-29 19:42:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1247 proven. 812 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-11-29 19:42:42,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040218048] [2020-11-29 19:42:42,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168573201] [2020-11-29 19:42:42,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:43,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:42:43,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:43,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-29 19:42:43,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1247 proven. 812 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-11-29 19:42:43,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:43,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-11-29 19:42:43,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974681516] [2020-11-29 19:42:43,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-29 19:42:43,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:43,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-29 19:42:43,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-11-29 19:42:43,136 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 41 states. [2020-11-29 19:42:43,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:43,354 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-11-29 19:42:43,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-29 19:42:43,355 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 123 [2020-11-29 19:42:43,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:43,356 INFO L225 Difference]: With dead ends: 172 [2020-11-29 19:42:43,356 INFO L226 Difference]: Without dead ends: 126 [2020-11-29 19:42:43,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-11-29 19:42:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-29 19:42:43,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-11-29 19:42:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-29 19:42:43,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2020-11-29 19:42:43,362 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2020-11-29 19:42:43,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:43,362 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2020-11-29 19:42:43,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-29 19:42:43,362 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2020-11-29 19:42:43,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-29 19:42:43,363 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:43,363 INFO L422 BasicCegarLoop]: trace histogram [51, 29, 22, 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 19:42:43,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-29 19:42:43,580 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:43,580 INFO L82 PathProgramCache]: Analyzing trace with hash 567459572, now seen corresponding path program 29 times [2020-11-29 19:42:43,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:43,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483243901] [2020-11-29 19:42:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1290 proven. 870 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-11-29 19:42:44,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483243901] [2020-11-29 19:42:44,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846980002] [2020-11-29 19:42:44,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:44,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2020-11-29 19:42:44,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:44,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 19:42:44,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 625 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-11-29 19:42:46,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:46,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 28] total 67 [2020-11-29 19:42:46,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273921745] [2020-11-29 19:42:46,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-11-29 19:42:46,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:46,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-11-29 19:42:46,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-11-29 19:42:46,195 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 67 states. [2020-11-29 19:42:46,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:46,529 INFO L93 Difference]: Finished difference Result 183 states and 189 transitions. [2020-11-29 19:42:46,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-29 19:42:46,530 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 125 [2020-11-29 19:42:46,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:46,531 INFO L225 Difference]: With dead ends: 183 [2020-11-29 19:42:46,531 INFO L226 Difference]: Without dead ends: 137 [2020-11-29 19:42:46,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-11-29 19:42:46,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-11-29 19:42:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-11-29 19:42:46,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-29 19:42:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2020-11-29 19:42:46,538 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 125 [2020-11-29 19:42:46,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:46,539 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2020-11-29 19:42:46,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-11-29 19:42:46,539 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2020-11-29 19:42:46,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-29 19:42:46,540 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:46,540 INFO L422 BasicCegarLoop]: trace histogram [56, 30, 26, 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 19:42:46,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-29 19:42:46,764 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:46,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:46,764 INFO L82 PathProgramCache]: Analyzing trace with hash 651845945, now seen corresponding path program 30 times [2020-11-29 19:42:46,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:46,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999748495] [2020-11-29 19:42:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1581 proven. 930 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-11-29 19:42:47,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999748495] [2020-11-29 19:42:47,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681542815] [2020-11-29 19:42:47,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:47,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2020-11-29 19:42:47,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:47,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 19:42:47,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 784 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2020-11-29 19:42:49,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:49,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 31] total 71 [2020-11-29 19:42:49,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291913982] [2020-11-29 19:42:49,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-11-29 19:42:49,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:49,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-11-29 19:42:49,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-11-29 19:42:49,278 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 71 states. [2020-11-29 19:42:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:49,579 INFO L93 Difference]: Finished difference Result 199 states and 204 transitions. [2020-11-29 19:42:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-29 19:42:49,580 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 135 [2020-11-29 19:42:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:49,581 INFO L225 Difference]: With dead ends: 199 [2020-11-29 19:42:49,581 INFO L226 Difference]: Without dead ends: 145 [2020-11-29 19:42:49,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-11-29 19:42:49,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-29 19:42:49,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-11-29 19:42:49,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-29 19:42:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-11-29 19:42:49,588 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 135 [2020-11-29 19:42:49,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:49,589 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-11-29 19:42:49,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-11-29 19:42:49,589 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-11-29 19:42:49,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-11-29 19:42:49,590 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:49,590 INFO L422 BasicCegarLoop]: trace histogram [60, 31, 29, 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 19:42:49,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:42:49,815 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:49,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:49,816 INFO L82 PathProgramCache]: Analyzing trace with hash 403121732, now seen corresponding path program 31 times [2020-11-29 19:42:49,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:49,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861560163] [2020-11-29 19:42:49,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1824 proven. 992 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-11-29 19:42:50,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861560163] [2020-11-29 19:42:50,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434656827] [2020-11-29 19:42:50,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:50,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-29 19:42:50,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1824 proven. 992 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-11-29 19:42:50,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:50,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-11-29 19:42:50,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160425231] [2020-11-29 19:42:50,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-29 19:42:50,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:50,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-29 19:42:50,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-11-29 19:42:50,864 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 44 states. [2020-11-29 19:42:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:51,072 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2020-11-29 19:42:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-29 19:42:51,072 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 143 [2020-11-29 19:42:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:51,074 INFO L225 Difference]: With dead ends: 206 [2020-11-29 19:42:51,074 INFO L226 Difference]: Without dead ends: 146 [2020-11-29 19:42:51,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-11-29 19:42:51,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-29 19:42:51,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-11-29 19:42:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-11-29 19:42:51,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2020-11-29 19:42:51,080 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 143 [2020-11-29 19:42:51,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:51,081 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2020-11-29 19:42:51,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-29 19:42:51,081 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2020-11-29 19:42:51,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-29 19:42:51,083 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:51,083 INFO L422 BasicCegarLoop]: trace histogram [61, 32, 29, 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 19:42:51,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-29 19:42:51,308 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:51,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1973964641, now seen corresponding path program 32 times [2020-11-29 19:42:51,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:51,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576814876] [2020-11-29 19:42:51,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1881 proven. 1056 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-11-29 19:42:52,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576814876] [2020-11-29 19:42:52,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198157873] [2020-11-29 19:42:52,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:52,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:42:52,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:52,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-29 19:42:52,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1881 proven. 1056 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-11-29 19:42:52,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:52,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-11-29 19:42:52,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132758661] [2020-11-29 19:42:52,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-29 19:42:52,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:52,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-29 19:42:52,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 19:42:52,681 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand 45 states. [2020-11-29 19:42:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:52,944 INFO L93 Difference]: Finished difference Result 208 states and 210 transitions. [2020-11-29 19:42:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-29 19:42:52,945 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 145 [2020-11-29 19:42:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:52,946 INFO L225 Difference]: With dead ends: 208 [2020-11-29 19:42:52,946 INFO L226 Difference]: Without dead ends: 148 [2020-11-29 19:42:52,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 19:42:52,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-29 19:42:52,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-11-29 19:42:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-29 19:42:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2020-11-29 19:42:52,955 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 145 [2020-11-29 19:42:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:52,956 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2020-11-29 19:42:52,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-29 19:42:52,956 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2020-11-29 19:42:52,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-11-29 19:42:52,957 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:52,957 INFO L422 BasicCegarLoop]: trace histogram [62, 33, 29, 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 19:42:53,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-29 19:42:53,172 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:53,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:53,172 INFO L82 PathProgramCache]: Analyzing trace with hash -274488002, now seen corresponding path program 33 times [2020-11-29 19:42:53,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:53,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523029428] [2020-11-29 19:42:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1938 proven. 1122 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-11-29 19:42:54,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523029428] [2020-11-29 19:42:54,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872227476] [2020-11-29 19:42:54,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:54,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2020-11-29 19:42:54,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:54,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 19:42:54,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1947 proven. 841 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2020-11-29 19:42:56,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:56,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 32] total 75 [2020-11-29 19:42:56,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837989412] [2020-11-29 19:42:56,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-11-29 19:42:56,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:56,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-11-29 19:42:56,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-11-29 19:42:56,182 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 75 states. [2020-11-29 19:42:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:56,625 INFO L93 Difference]: Finished difference Result 213 states and 216 transitions. [2020-11-29 19:42:56,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-29 19:42:56,625 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 147 [2020-11-29 19:42:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:56,626 INFO L225 Difference]: With dead ends: 213 [2020-11-29 19:42:56,626 INFO L226 Difference]: Without dead ends: 153 [2020-11-29 19:42:56,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-11-29 19:42:56,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-29 19:42:56,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-11-29 19:42:56,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-29 19:42:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2020-11-29 19:42:56,632 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 147 [2020-11-29 19:42:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:56,632 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2020-11-29 19:42:56,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-11-29 19:42:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2020-11-29 19:42:56,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-11-29 19:42:56,634 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:56,634 INFO L422 BasicCegarLoop]: trace histogram [64, 34, 30, 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 19:42:56,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:42:56,847 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:56,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:56,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1397712405, now seen corresponding path program 34 times [2020-11-29 19:42:56,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:56,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543122049] [2020-11-29 19:42:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2065 proven. 1190 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-11-29 19:42:57,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543122049] [2020-11-29 19:42:57,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151493292] [2020-11-29 19:42:57,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:58,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:42:58,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:58,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-29 19:42:58,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2065 proven. 1190 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-11-29 19:42:58,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:42:58,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-11-29 19:42:58,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794119612] [2020-11-29 19:42:58,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-29 19:42:58,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:42:58,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-29 19:42:58,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-11-29 19:42:58,110 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 47 states. [2020-11-29 19:42:58,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:58,322 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2020-11-29 19:42:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-29 19:42:58,323 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 151 [2020-11-29 19:42:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:58,324 INFO L225 Difference]: With dead ends: 216 [2020-11-29 19:42:58,324 INFO L226 Difference]: Without dead ends: 154 [2020-11-29 19:42:58,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-11-29 19:42:58,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-29 19:42:58,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-11-29 19:42:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-11-29 19:42:58,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-11-29 19:42:58,330 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 151 [2020-11-29 19:42:58,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:58,331 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-11-29 19:42:58,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-29 19:42:58,331 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-11-29 19:42:58,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-11-29 19:42:58,332 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:58,332 INFO L422 BasicCegarLoop]: trace histogram [65, 35, 30, 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 19:42:58,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-29 19:42:58,548 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:58,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:58,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1098392114, now seen corresponding path program 35 times [2020-11-29 19:42:58,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:42:58,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402985016] [2020-11-29 19:42:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:42:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2124 proven. 1260 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-11-29 19:42:59,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402985016] [2020-11-29 19:42:59,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263907594] [2020-11-29 19:42:59,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:42:59,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-11-29 19:42:59,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:42:59,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 19:42:59,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2145 proven. 1024 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2020-11-29 19:43:01,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:43:01,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 35] total 80 [2020-11-29 19:43:01,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918934396] [2020-11-29 19:43:01,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-11-29 19:43:01,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:01,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-11-29 19:43:01,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-11-29 19:43:01,805 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 80 states. [2020-11-29 19:43:02,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:02,250 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2020-11-29 19:43:02,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-29 19:43:02,250 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 153 [2020-11-29 19:43:02,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:02,251 INFO L225 Difference]: With dead ends: 225 [2020-11-29 19:43:02,251 INFO L226 Difference]: Without dead ends: 163 [2020-11-29 19:43:02,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-11-29 19:43:02,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-29 19:43:02,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-11-29 19:43:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-11-29 19:43:02,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-11-29 19:43:02,259 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 153 [2020-11-29 19:43:02,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:02,259 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-11-29 19:43:02,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-11-29 19:43:02,260 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-11-29 19:43:02,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-11-29 19:43:02,260 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:02,261 INFO L422 BasicCegarLoop]: trace histogram [69, 36, 33, 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 19:43:02,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:43:02,468 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:02,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:02,468 INFO L82 PathProgramCache]: Analyzing trace with hash -510719171, now seen corresponding path program 36 times [2020-11-29 19:43:02,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:02,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166659327] [2020-11-29 19:43:02,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2405 proven. 1332 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-11-29 19:43:03,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166659327] [2020-11-29 19:43:03,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210435772] [2020-11-29 19:43:03,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:43:03,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 69 check-sat command(s) [2020-11-29 19:43:03,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:43:03,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 47 conjunts are in the unsatisfiable core [2020-11-29 19:43:03,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2405 proven. 1332 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-11-29 19:43:04,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:43:04,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-11-29 19:43:04,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490346557] [2020-11-29 19:43:04,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-29 19:43:04,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:04,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-29 19:43:04,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-11-29 19:43:04,035 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 49 states. [2020-11-29 19:43:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:04,303 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-11-29 19:43:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-29 19:43:04,304 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 161 [2020-11-29 19:43:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:04,305 INFO L225 Difference]: With dead ends: 232 [2020-11-29 19:43:04,305 INFO L226 Difference]: Without dead ends: 164 [2020-11-29 19:43:04,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-11-29 19:43:04,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-11-29 19:43:04,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2020-11-29 19:43:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-11-29 19:43:04,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2020-11-29 19:43:04,311 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 161 [2020-11-29 19:43:04,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:04,319 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2020-11-29 19:43:04,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-29 19:43:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2020-11-29 19:43:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-11-29 19:43:04,321 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:04,321 INFO L422 BasicCegarLoop]: trace histogram [70, 37, 33, 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 19:43:04,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-29 19:43:04,539 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:04,540 INFO L82 PathProgramCache]: Analyzing trace with hash 249890586, now seen corresponding path program 37 times [2020-11-29 19:43:04,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:04,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209475822] [2020-11-29 19:43:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2470 proven. 1406 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-11-29 19:43:05,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209475822] [2020-11-29 19:43:05,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613211255] [2020-11-29 19:43:05,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:43:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:05,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 48 conjunts are in the unsatisfiable core [2020-11-29 19:43:05,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2470 proven. 1406 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-11-29 19:43:05,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:43:05,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-11-29 19:43:05,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491775376] [2020-11-29 19:43:05,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-29 19:43:05,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:05,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-29 19:43:05,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-11-29 19:43:05,988 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 50 states. [2020-11-29 19:43:06,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:06,251 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2020-11-29 19:43:06,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-29 19:43:06,251 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 163 [2020-11-29 19:43:06,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:06,252 INFO L225 Difference]: With dead ends: 234 [2020-11-29 19:43:06,252 INFO L226 Difference]: Without dead ends: 166 [2020-11-29 19:43:06,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-11-29 19:43:06,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-11-29 19:43:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-11-29 19:43:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-11-29 19:43:06,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2020-11-29 19:43:06,258 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 163 [2020-11-29 19:43:06,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:06,258 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2020-11-29 19:43:06,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-29 19:43:06,259 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2020-11-29 19:43:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-29 19:43:06,260 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:06,260 INFO L422 BasicCegarLoop]: trace histogram [71, 38, 33, 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 19:43:06,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-29 19:43:06,472 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:06,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:06,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1051426743, now seen corresponding path program 38 times [2020-11-29 19:43:06,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:06,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845073411] [2020-11-29 19:43:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2535 proven. 1482 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-11-29 19:43:08,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845073411] [2020-11-29 19:43:08,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447647216] [2020-11-29 19:43:08,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:43:08,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:43:08,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:43:08,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 49 conjunts are in the unsatisfiable core [2020-11-29 19:43:08,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2535 proven. 1482 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-11-29 19:43:08,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:43:08,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-11-29 19:43:08,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358077726] [2020-11-29 19:43:08,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-11-29 19:43:08,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:08,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-11-29 19:43:08,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-11-29 19:43:08,151 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 51 states. [2020-11-29 19:43:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:08,334 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2020-11-29 19:43:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-29 19:43:08,335 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 165 [2020-11-29 19:43:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:08,336 INFO L225 Difference]: With dead ends: 236 [2020-11-29 19:43:08,336 INFO L226 Difference]: Without dead ends: 168 [2020-11-29 19:43:08,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-11-29 19:43:08,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-11-29 19:43:08,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-11-29 19:43:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-11-29 19:43:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2020-11-29 19:43:08,342 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2020-11-29 19:43:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:08,343 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2020-11-29 19:43:08,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-11-29 19:43:08,343 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2020-11-29 19:43:08,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-11-29 19:43:08,344 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:08,344 INFO L422 BasicCegarLoop]: trace histogram [72, 39, 33, 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 19:43:08,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-29 19:43:08,559 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:08,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:08,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1766439660, now seen corresponding path program 39 times [2020-11-29 19:43:08,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:08,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877721808] [2020-11-29 19:43:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2600 proven. 1560 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-11-29 19:43:09,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877721808] [2020-11-29 19:43:09,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108915468] [2020-11-29 19:43:09,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:43:09,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2020-11-29 19:43:09,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:43:09,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-29 19:43:09,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2613 proven. 1089 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2020-11-29 19:43:12,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:43:12,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 36] total 85 [2020-11-29 19:43:12,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970682546] [2020-11-29 19:43:12,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-11-29 19:43:12,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:12,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-11-29 19:43:12,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-11-29 19:43:12,092 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 85 states. [2020-11-29 19:43:12,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:12,517 INFO L93 Difference]: Finished difference Result 241 states and 244 transitions. [2020-11-29 19:43:12,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-11-29 19:43:12,518 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 167 [2020-11-29 19:43:12,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:12,519 INFO L225 Difference]: With dead ends: 241 [2020-11-29 19:43:12,519 INFO L226 Difference]: Without dead ends: 173 [2020-11-29 19:43:12,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-11-29 19:43:12,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-29 19:43:12,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2020-11-29 19:43:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-11-29 19:43:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2020-11-29 19:43:12,524 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2020-11-29 19:43:12,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:12,525 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2020-11-29 19:43:12,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-11-29 19:43:12,525 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2020-11-29 19:43:12,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-11-29 19:43:12,526 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:12,526 INFO L422 BasicCegarLoop]: trace histogram [74, 40, 34, 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 19:43:12,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-29 19:43:12,751 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:12,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:12,751 INFO L82 PathProgramCache]: Analyzing trace with hash -502982677, now seen corresponding path program 40 times [2020-11-29 19:43:12,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:12,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852352416] [2020-11-29 19:43:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2747 proven. 1640 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-11-29 19:43:14,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852352416] [2020-11-29 19:43:14,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424329684] [2020-11-29 19:43:14,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:43:14,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:43:14,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:43:14,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 51 conjunts are in the unsatisfiable core [2020-11-29 19:43:14,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2747 proven. 1640 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-11-29 19:43:14,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:43:14,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-11-29 19:43:14,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229184791] [2020-11-29 19:43:14,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-29 19:43:14,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:14,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-29 19:43:14,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-11-29 19:43:14,297 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 53 states. [2020-11-29 19:43:14,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:14,633 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2020-11-29 19:43:14,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-29 19:43:14,634 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 171 [2020-11-29 19:43:14,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:14,635 INFO L225 Difference]: With dead ends: 244 [2020-11-29 19:43:14,635 INFO L226 Difference]: Without dead ends: 174 [2020-11-29 19:43:14,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-11-29 19:43:14,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-11-29 19:43:14,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2020-11-29 19:43:14,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-11-29 19:43:14,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-11-29 19:43:14,641 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2020-11-29 19:43:14,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:14,642 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-11-29 19:43:14,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-29 19:43:14,642 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-11-29 19:43:14,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-11-29 19:43:14,643 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:14,643 INFO L422 BasicCegarLoop]: trace histogram [75, 41, 34, 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 19:43:14,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:43:14,844 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:14,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:14,844 INFO L82 PathProgramCache]: Analyzing trace with hash -305421432, now seen corresponding path program 41 times [2020-11-29 19:43:14,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:14,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169031251] [2020-11-29 19:43:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:18,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169031251] [2020-11-29 19:43:18,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628487858] [2020-11-29 19:43:18,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:43:18,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2020-11-29 19:43:18,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:43:18,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-29 19:43:18,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2850 proven. 1369 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2020-11-29 19:43:18,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:43:18,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 40] total 90 [2020-11-29 19:43:18,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775079995] [2020-11-29 19:43:18,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-11-29 19:43:18,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:18,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-11-29 19:43:18,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-11-29 19:43:18,832 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 90 states. [2020-11-29 19:43:19,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:19,251 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2020-11-29 19:43:19,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-11-29 19:43:19,252 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 173 [2020-11-29 19:43:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:19,253 INFO L225 Difference]: With dead ends: 186 [2020-11-29 19:43:19,253 INFO L226 Difference]: Without dead ends: 183 [2020-11-29 19:43:19,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-11-29 19:43:19,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-11-29 19:43:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2020-11-29 19:43:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-11-29 19:43:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2020-11-29 19:43:19,260 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 173 [2020-11-29 19:43:19,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:19,261 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2020-11-29 19:43:19,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-11-29 19:43:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2020-11-29 19:43:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-11-29 19:43:19,262 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:19,262 INFO L422 BasicCegarLoop]: trace histogram [79, 41, 38, 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 19:43:19,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-29 19:43:19,480 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:19,480 INFO L82 PathProgramCache]: Analyzing trace with hash -2140145552, now seen corresponding path program 42 times [2020-11-29 19:43:19,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:19,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467399156] [2020-11-29 19:43:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:23,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467399156] [2020-11-29 19:43:23,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819303665] [2020-11-29 19:43:23,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:43:23,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2020-11-29 19:43:23,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:43:23,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-29 19:43:23,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 1521 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2020-11-29 19:43:24,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:43:24,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 42] total 92 [2020-11-29 19:43:24,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089837602] [2020-11-29 19:43:24,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-11-29 19:43:24,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:24,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-11-29 19:43:24,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-11-29 19:43:24,055 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 92 states. [2020-11-29 19:43:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:24,483 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2020-11-29 19:43:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-11-29 19:43:24,483 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 181 [2020-11-29 19:43:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:24,485 INFO L225 Difference]: With dead ends: 190 [2020-11-29 19:43:24,485 INFO L226 Difference]: Without dead ends: 187 [2020-11-29 19:43:24,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-11-29 19:43:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-11-29 19:43:24,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2020-11-29 19:43:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-11-29 19:43:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2020-11-29 19:43:24,492 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 181 [2020-11-29 19:43:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:24,493 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2020-11-29 19:43:24,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-11-29 19:43:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2020-11-29 19:43:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-11-29 19:43:24,494 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:24,494 INFO L422 BasicCegarLoop]: trace histogram [81, 41, 40, 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 19:43:24,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-29 19:43:24,708 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:24,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:24,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1382163484, now seen corresponding path program 43 times [2020-11-29 19:43:24,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:24,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793206362] [2020-11-29 19:43:24,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:28,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793206362] [2020-11-29 19:43:28,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375249458] [2020-11-29 19:43:28,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:43:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:28,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 92 conjunts are in the unsatisfiable core [2020-11-29 19:43:28,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:28,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:43:28,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2020-11-29 19:43:28,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827328427] [2020-11-29 19:43:28,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-11-29 19:43:28,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:28,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-11-29 19:43:28,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-11-29 19:43:28,999 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 94 states. [2020-11-29 19:43:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:29,390 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2020-11-29 19:43:29,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-11-29 19:43:29,391 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 185 [2020-11-29 19:43:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:29,392 INFO L225 Difference]: With dead ends: 192 [2020-11-29 19:43:29,393 INFO L226 Difference]: Without dead ends: 189 [2020-11-29 19:43:29,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-11-29 19:43:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-29 19:43:29,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2020-11-29 19:43:29,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-11-29 19:43:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2020-11-29 19:43:29,417 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 185 [2020-11-29 19:43:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:29,418 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2020-11-29 19:43:29,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-11-29 19:43:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2020-11-29 19:43:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-11-29 19:43:29,421 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:29,421 INFO L422 BasicCegarLoop]: trace histogram [82, 41, 41, 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 19:43:29,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:43:29,632 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:29,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1121752098, now seen corresponding path program 44 times [2020-11-29 19:43:29,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:29,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561669199] [2020-11-29 19:43:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:33,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561669199] [2020-11-29 19:43:33,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584995818] [2020-11-29 19:43:33,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:43:33,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:43:33,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:43:33,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 93 conjunts are in the unsatisfiable core [2020-11-29 19:43:33,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:33,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:43:33,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2020-11-29 19:43:33,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557352326] [2020-11-29 19:43:33,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-11-29 19:43:33,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:33,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-11-29 19:43:33,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2020-11-29 19:43:33,863 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand 95 states. [2020-11-29 19:43:34,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:34,406 INFO L93 Difference]: Finished difference Result 194 states and 195 transitions. [2020-11-29 19:43:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-11-29 19:43:34,407 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 187 [2020-11-29 19:43:34,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:34,408 INFO L225 Difference]: With dead ends: 194 [2020-11-29 19:43:34,409 INFO L226 Difference]: Without dead ends: 191 [2020-11-29 19:43:34,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2020-11-29 19:43:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-11-29 19:43:34,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2020-11-29 19:43:34,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-11-29 19:43:34,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2020-11-29 19:43:34,415 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 187 [2020-11-29 19:43:34,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:34,416 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2020-11-29 19:43:34,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-11-29 19:43:34,416 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2020-11-29 19:43:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-11-29 19:43:34,417 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:34,417 INFO L422 BasicCegarLoop]: trace histogram [83, 42, 41, 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 19:43:34,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-11-29 19:43:34,618 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:34,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:34,618 INFO L82 PathProgramCache]: Analyzing trace with hash 25486680, now seen corresponding path program 45 times [2020-11-29 19:43:34,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:34,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155567034] [2020-11-29 19:43:34,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:39,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155567034] [2020-11-29 19:43:39,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289362667] [2020-11-29 19:43:39,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:43:39,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2020-11-29 19:43:39,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:43:39,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 94 conjunts are in the unsatisfiable core [2020-11-29 19:43:39,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:39,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:43:39,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2020-11-29 19:43:39,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906391749] [2020-11-29 19:43:39,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-11-29 19:43:39,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:39,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-11-29 19:43:39,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-11-29 19:43:39,331 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 96 states. [2020-11-29 19:43:39,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:39,908 INFO L93 Difference]: Finished difference Result 196 states and 197 transitions. [2020-11-29 19:43:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-11-29 19:43:39,908 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 189 [2020-11-29 19:43:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:39,910 INFO L225 Difference]: With dead ends: 196 [2020-11-29 19:43:39,910 INFO L226 Difference]: Without dead ends: 193 [2020-11-29 19:43:39,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-11-29 19:43:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-29 19:43:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2020-11-29 19:43:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-11-29 19:43:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2020-11-29 19:43:39,915 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2020-11-29 19:43:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:39,915 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2020-11-29 19:43:39,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-11-29 19:43:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2020-11-29 19:43:39,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-11-29 19:43:39,916 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:39,917 INFO L422 BasicCegarLoop]: trace histogram [84, 43, 41, 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 19:43:40,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:43:40,117 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:40,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:40,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1284642734, now seen corresponding path program 46 times [2020-11-29 19:43:40,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:40,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88857802] [2020-11-29 19:43:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:44,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88857802] [2020-11-29 19:43:44,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904722155] [2020-11-29 19:43:44,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:43:44,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:43:44,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:43:44,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 95 conjunts are in the unsatisfiable core [2020-11-29 19:43:44,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:44,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:43:44,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2020-11-29 19:43:44,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177099162] [2020-11-29 19:43:44,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-11-29 19:43:44,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:44,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-11-29 19:43:44,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-11-29 19:43:44,742 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 97 states. [2020-11-29 19:43:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:45,264 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2020-11-29 19:43:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-11-29 19:43:45,264 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 191 [2020-11-29 19:43:45,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:45,265 INFO L225 Difference]: With dead ends: 198 [2020-11-29 19:43:45,265 INFO L226 Difference]: Without dead ends: 195 [2020-11-29 19:43:45,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-11-29 19:43:45,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-11-29 19:43:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2020-11-29 19:43:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-29 19:43:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-11-29 19:43:45,272 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 191 [2020-11-29 19:43:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:45,273 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-11-29 19:43:45,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-11-29 19:43:45,273 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-11-29 19:43:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-11-29 19:43:45,274 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:45,275 INFO L422 BasicCegarLoop]: trace histogram [85, 44, 41, 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 19:43:45,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-11-29 19:43:45,500 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:45,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:45,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1893591860, now seen corresponding path program 47 times [2020-11-29 19:43:45,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:45,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484190889] [2020-11-29 19:43:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:50,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484190889] [2020-11-29 19:43:50,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798182296] [2020-11-29 19:43:50,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:43:50,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 86 check-sat command(s) [2020-11-29 19:43:50,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:43:50,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 47 conjunts are in the unsatisfiable core [2020-11-29 19:43:50,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3649 proven. 1936 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-11-29 19:43:50,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:43:50,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 47] total 97 [2020-11-29 19:43:50,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297025870] [2020-11-29 19:43:50,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-11-29 19:43:50,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:50,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-11-29 19:43:50,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-11-29 19:43:50,270 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 97 states. [2020-11-29 19:43:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:50,831 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2020-11-29 19:43:50,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-11-29 19:43:50,832 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 193 [2020-11-29 19:43:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:50,833 INFO L225 Difference]: With dead ends: 200 [2020-11-29 19:43:50,833 INFO L226 Difference]: Without dead ends: 197 [2020-11-29 19:43:50,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-11-29 19:43:50,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-11-29 19:43:50,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2020-11-29 19:43:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-11-29 19:43:50,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2020-11-29 19:43:50,841 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 193 [2020-11-29 19:43:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:50,841 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2020-11-29 19:43:50,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-11-29 19:43:50,841 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2020-11-29 19:43:50,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-11-29 19:43:50,843 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:50,843 INFO L422 BasicCegarLoop]: trace histogram [86, 45, 41, 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 19:43:51,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:43:51,048 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:51,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:51,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1316817606, now seen corresponding path program 48 times [2020-11-29 19:43:51,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:51,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974721173] [2020-11-29 19:43:51,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:55,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974721173] [2020-11-29 19:43:55,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101500876] [2020-11-29 19:43:55,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:43:55,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2020-11-29 19:43:55,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:43:55,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 48 conjunts are in the unsatisfiable core [2020-11-29 19:43:55,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3731 proven. 2025 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-11-29 19:43:55,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:43:55,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 48] total 98 [2020-11-29 19:43:55,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168278931] [2020-11-29 19:43:56,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-11-29 19:43:56,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:56,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-11-29 19:43:56,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2020-11-29 19:43:56,003 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand 98 states. [2020-11-29 19:43:56,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:56,687 INFO L93 Difference]: Finished difference Result 202 states and 203 transitions. [2020-11-29 19:43:56,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-11-29 19:43:56,687 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 195 [2020-11-29 19:43:56,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:56,688 INFO L225 Difference]: With dead ends: 202 [2020-11-29 19:43:56,688 INFO L226 Difference]: Without dead ends: 199 [2020-11-29 19:43:56,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2020-11-29 19:43:56,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-29 19:43:56,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2020-11-29 19:43:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-11-29 19:43:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2020-11-29 19:43:56,694 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2020-11-29 19:43:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:56,694 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2020-11-29 19:43:56,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-11-29 19:43:56,694 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2020-11-29 19:43:56,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-11-29 19:43:56,695 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:56,696 INFO L422 BasicCegarLoop]: trace histogram [87, 46, 41, 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 19:43:56,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-29 19:43:56,919 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:56,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:56,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1561171392, now seen corresponding path program 49 times [2020-11-29 19:43:56,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:56,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303345417] [2020-11-29 19:43:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:44:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:44:02,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303345417] [2020-11-29 19:44:02,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607488852] [2020-11-29 19:44:02,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:44:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:44:02,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 98 conjunts are in the unsatisfiable core [2020-11-29 19:44:02,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:44:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:44:02,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:44:02,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2020-11-29 19:44:02,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022602474] [2020-11-29 19:44:02,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-11-29 19:44:02,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:44:02,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-11-29 19:44:02,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2020-11-29 19:44:02,234 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 100 states. [2020-11-29 19:44:02,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:44:02,919 INFO L93 Difference]: Finished difference Result 204 states and 205 transitions. [2020-11-29 19:44:02,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-11-29 19:44:02,919 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 197 [2020-11-29 19:44:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:44:02,920 INFO L225 Difference]: With dead ends: 204 [2020-11-29 19:44:02,921 INFO L226 Difference]: Without dead ends: 201 [2020-11-29 19:44:02,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2020-11-29 19:44:02,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-29 19:44:02,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-11-29 19:44:02,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-11-29 19:44:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2020-11-29 19:44:02,925 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 197 [2020-11-29 19:44:02,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:44:02,926 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2020-11-29 19:44:02,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-11-29 19:44:02,926 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2020-11-29 19:44:02,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-11-29 19:44:02,927 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:44:02,928 INFO L422 BasicCegarLoop]: trace histogram [88, 47, 41, 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 19:44:03,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-29 19:44:03,152 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:44:03,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:44:03,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1349659846, now seen corresponding path program 50 times [2020-11-29 19:44:03,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:44:03,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949896818] [2020-11-29 19:44:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:44:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:44:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:44:08,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949896818] [2020-11-29 19:44:08,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186453756] [2020-11-29 19:44:08,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:44:08,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:44:08,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:44:08,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 99 conjunts are in the unsatisfiable core [2020-11-29 19:44:08,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:44:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:44:08,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:44:08,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2020-11-29 19:44:08,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467639932] [2020-11-29 19:44:08,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-11-29 19:44:08,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:44:08,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-11-29 19:44:08,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2020-11-29 19:44:08,594 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand 101 states. [2020-11-29 19:44:09,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:44:09,191 INFO L93 Difference]: Finished difference Result 206 states and 207 transitions. [2020-11-29 19:44:09,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-11-29 19:44:09,192 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 199 [2020-11-29 19:44:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:44:09,197 INFO L225 Difference]: With dead ends: 206 [2020-11-29 19:44:09,197 INFO L226 Difference]: Without dead ends: 203 [2020-11-29 19:44:09,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2020-11-29 19:44:09,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-29 19:44:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2020-11-29 19:44:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-11-29 19:44:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2020-11-29 19:44:09,204 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 199 [2020-11-29 19:44:09,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:44:09,205 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2020-11-29 19:44:09,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-11-29 19:44:09,205 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2020-11-29 19:44:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-11-29 19:44:09,206 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:44:09,207 INFO L422 BasicCegarLoop]: trace histogram [89, 48, 41, 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 19:44:09,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-29 19:44:09,423 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:44:09,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:44:09,424 INFO L82 PathProgramCache]: Analyzing trace with hash 49472948, now seen corresponding path program 51 times [2020-11-29 19:44:09,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:44:09,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006811132] [2020-11-29 19:44:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:44:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:44:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:44:14,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006811132] [2020-11-29 19:44:14,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828712340] [2020-11-29 19:44:14,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:44:14,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2020-11-29 19:44:14,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:44:14,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 100 conjunts are in the unsatisfiable core [2020-11-29 19:44:14,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:44:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:44:14,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:44:14,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2020-11-29 19:44:14,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264269043] [2020-11-29 19:44:14,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-11-29 19:44:14,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:44:14,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-11-29 19:44:14,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2020-11-29 19:44:14,705 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 102 states. [2020-11-29 19:44:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:44:15,424 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2020-11-29 19:44:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-11-29 19:44:15,425 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 201 [2020-11-29 19:44:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:44:15,426 INFO L225 Difference]: With dead ends: 208 [2020-11-29 19:44:15,426 INFO L226 Difference]: Without dead ends: 205 [2020-11-29 19:44:15,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2020-11-29 19:44:15,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-11-29 19:44:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2020-11-29 19:44:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-11-29 19:44:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-11-29 19:44:15,434 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2020-11-29 19:44:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:44:15,434 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-11-29 19:44:15,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-11-29 19:44:15,435 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-11-29 19:44:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-11-29 19:44:15,436 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:44:15,436 INFO L422 BasicCegarLoop]: trace histogram [90, 49, 41, 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 19:44:15,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-29 19:44:15,644 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:44:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:44:15,644 INFO L82 PathProgramCache]: Analyzing trace with hash 291324334, now seen corresponding path program 52 times [2020-11-29 19:44:15,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:44:15,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888366058] [2020-11-29 19:44:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:44:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:44:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:44:20,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888366058] [2020-11-29 19:44:20,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252733839] [2020-11-29 19:44:20,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:44:20,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:44:20,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:44:20,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 101 conjunts are in the unsatisfiable core [2020-11-29 19:44:20,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:44:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:44:21,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:44:21,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2020-11-29 19:44:21,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601553775] [2020-11-29 19:44:21,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-11-29 19:44:21,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:44:21,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-11-29 19:44:21,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-11-29 19:44:21,010 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 103 states. [2020-11-29 19:44:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:44:21,589 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2020-11-29 19:44:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-11-29 19:44:21,590 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 203 [2020-11-29 19:44:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:44:21,591 INFO L225 Difference]: With dead ends: 209 [2020-11-29 19:44:21,591 INFO L226 Difference]: Without dead ends: 206 [2020-11-29 19:44:21,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-11-29 19:44:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-11-29 19:44:21,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-11-29 19:44:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-11-29 19:44:21,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2020-11-29 19:44:21,598 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 203 [2020-11-29 19:44:21,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:44:21,598 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2020-11-29 19:44:21,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-11-29 19:44:21,598 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2020-11-29 19:44:21,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-11-29 19:44:21,599 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:44:21,599 INFO L422 BasicCegarLoop]: trace histogram [91, 50, 41, 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 19:44:21,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-29 19:44:21,800 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:44:21,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:44:21,800 INFO L82 PathProgramCache]: Analyzing trace with hash 782272296, now seen corresponding path program 53 times [2020-11-29 19:44:21,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:44:21,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453445649] [2020-11-29 19:44:21,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:44:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:44:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2020-11-29 19:44:23,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453445649] [2020-11-29 19:44:23,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794799019] [2020-11-29 19:44:23,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/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 19:44:23,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 92 check-sat command(s) [2020-11-29 19:44:23,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:44:23,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 105 conjunts are in the unsatisfiable core [2020-11-29 19:44:23,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:44:23,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:44:23,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:44:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2020-11-29 19:44:24,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:44:24,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-11-29 19:44:24,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98101244] [2020-11-29 19:44:24,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-11-29 19:44:24,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:44:24,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-11-29 19:44:24,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2020-11-29 19:44:24,115 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand 55 states. [2020-11-29 19:44:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:44:25,774 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2020-11-29 19:44:25,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-29 19:44:25,775 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 205 [2020-11-29 19:44:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:44:25,776 INFO L225 Difference]: With dead ends: 212 [2020-11-29 19:44:25,776 INFO L226 Difference]: Without dead ends: 209 [2020-11-29 19:44:25,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=113, Invalid=2967, Unknown=0, NotChecked=0, Total=3080 [2020-11-29 19:44:25,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-29 19:44:25,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2020-11-29 19:44:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-11-29 19:44:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2020-11-29 19:44:25,784 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 205 [2020-11-29 19:44:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:44:25,785 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2020-11-29 19:44:25,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-11-29 19:44:25,785 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2020-11-29 19:44:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-11-29 19:44:25,786 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:44:25,786 INFO L422 BasicCegarLoop]: trace histogram [92, 51, 41, 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 19:44:26,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-11-29 19:44:26,008 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:44:26,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:44:26,008 INFO L82 PathProgramCache]: Analyzing trace with hash 136861218, now seen corresponding path program 54 times [2020-11-29 19:44:26,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:44:26,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899604127] [2020-11-29 19:44:26,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:44:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:44:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 6742 proven. 0 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2020-11-29 19:44:27,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899604127] [2020-11-29 19:44:27,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:44:27,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-11-29 19:44:27,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743833627] [2020-11-29 19:44:27,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-29 19:44:27,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:44:27,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-29 19:44:27,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-11-29 19:44:27,438 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand 52 states. [2020-11-29 19:44:27,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:44:27,771 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2020-11-29 19:44:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-29 19:44:27,771 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 207 [2020-11-29 19:44:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:44:27,772 INFO L225 Difference]: With dead ends: 208 [2020-11-29 19:44:27,772 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 19:44:27,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-11-29 19:44:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 19:44:27,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 19:44:27,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 19:44:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 19:44:27,773 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 207 [2020-11-29 19:44:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:44:27,773 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:44:27,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-29 19:44:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 19:44:27,774 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 19:44:27,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-11-29 19:44:27,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 19:44:27,917 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 353 [2020-11-29 19:44:29,653 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 353 DAG size of output: 307 [2020-11-29 19:44:29,725 INFO L270 CegarLoopResult]: At program point L159(lines 43 160) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 5)) [2020-11-29 19:44:29,725 INFO L274 CegarLoopResult]: For program point L19(lines 19 208) no Hoare annotation was computed. [2020-11-29 19:44:29,725 INFO L270 CegarLoopResult]: At program point L135(lines 55 136) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= ULTIMATE.start_main_~main__x~0 7) (<= 50 ULTIMATE.start_main_~main__y~0)) [2020-11-29 19:44:29,725 INFO L274 CegarLoopResult]: For program point L94(lines 94 103) no Hoare annotation was computed. [2020-11-29 19:44:29,725 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 19:44:29,725 INFO L274 CegarLoopResult]: For program point L61(lines 61 124) no Hoare annotation was computed. [2020-11-29 19:44:29,725 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 19:44:29,727 INFO L270 CegarLoopResult]: At program point L111(lines 67 112) the Hoare annotation is: (or (and (< ULTIMATE.start_main_~main__x~0 68) (<= ULTIMATE.start_main_~main__y~0 67) (<= 67 ULTIMATE.start_main_~main__y~0) (<= 67 ULTIMATE.start_main_~main__x~0)) (and (<= ULTIMATE.start_main_~main__y~0 78) (<= 78 ULTIMATE.start_main_~main__y~0) (<= 78 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 78)) (and (<= 84 ULTIMATE.start_main_~main__x~0) (<= 84 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 84) (<= ULTIMATE.start_main_~main__x~0 84)) (and (<= 90 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 90) (<= 90 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 90)) (and (<= ULTIMATE.start_main_~main__y~0 75) (<= 75 ULTIMATE.start_main_~main__x~0) (< ULTIMATE.start_main_~main__x~0 76) (<= 75 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 81) (<= 81 ULTIMATE.start_main_~main__x~0) (< ULTIMATE.start_main_~main__x~0 82) (<= 81 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 88) (<= ULTIMATE.start_main_~main__x~0 88) (<= 88 ULTIMATE.start_main_~main__y~0) (<= 88 ULTIMATE.start_main_~main__x~0)) (and (<= ULTIMATE.start_main_~main__y~0 91) (<= 91 ULTIMATE.start_main_~main__x~0) (<= 91 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 91)) (and (< ULTIMATE.start_main_~main__x~0 54) (<= 53 ULTIMATE.start_main_~main__y~0) (<= 53 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 53)) (and (<= 66 ULTIMATE.start_main_~main__x~0) (<= 66 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 66) (< ULTIMATE.start_main_~main__x~0 67)) (and (<= 58 ULTIMATE.start_main_~main__y~0) (<= 58 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 58) (< ULTIMATE.start_main_~main__x~0 59)) (and (<= 57 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 57) (<= 57 ULTIMATE.start_main_~main__y~0) (< ULTIMATE.start_main_~main__x~0 58)) (and (<= ULTIMATE.start_main_~main__y~0 68) (<= 68 ULTIMATE.start_main_~main__y~0) (<= 68 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 68)) (and (<= 69 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 69) (<= 69 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 69)) (and (<= 87 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 87) (<= 87 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 87)) (and (<= ULTIMATE.start_main_~main__y~0 72) (<= 72 ULTIMATE.start_main_~main__y~0) (<= 72 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 72)) (and (<= 77 ULTIMATE.start_main_~main__x~0) (< ULTIMATE.start_main_~main__x~0 78) (<= ULTIMATE.start_main_~main__y~0 77) (<= 77 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 79) (<= 79 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 79) (<= 79 ULTIMATE.start_main_~main__y~0)) (and (< ULTIMATE.start_main_~main__x~0 81) (<= ULTIMATE.start_main_~main__y~0 80) (<= 80 ULTIMATE.start_main_~main__x~0) (<= 80 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 71) (<= 71 ULTIMATE.start_main_~main__x~0) (< ULTIMATE.start_main_~main__x~0 72) (<= 71 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 50) (< ULTIMATE.start_main_~main__x~0 51) (<= 50 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 93) (<= ULTIMATE.start_main_~main__x~0 93) (<= 93 ULTIMATE.start_main_~main__x~0) (<= 93 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 99) (<= ULTIMATE.start_main_~main__x~0 99) (<= 99 ULTIMATE.start_main_~main__y~0) (<= 99 ULTIMATE.start_main_~main__x~0)) (and (<= ULTIMATE.start_main_~main__x~0 82) (<= 82 ULTIMATE.start_main_~main__y~0) (<= 82 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 82)) (and (<= 96 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 96) (<= 96 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 96)) (and (<= 95 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 95) (<= ULTIMATE.start_main_~main__x~0 95) (<= 95 ULTIMATE.start_main_~main__y~0)) (and (<= 70 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 70) (<= 70 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 70)) (and (<= 51 ULTIMATE.start_main_~main__y~0) (<= 51 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 51) (<= ULTIMATE.start_main_~main__x~0 51)) (and (<= ULTIMATE.start_main_~main__x~0 92) (<= ULTIMATE.start_main_~main__y~0 92) (<= 92 ULTIMATE.start_main_~main__x~0) (<= 92 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 83) (< ULTIMATE.start_main_~main__x~0 84) (<= 83 ULTIMATE.start_main_~main__y~0) (<= 83 ULTIMATE.start_main_~main__x~0)) (and (<= ULTIMATE.start_main_~main__y~0 59) (<= 59 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 59) (<= 59 ULTIMATE.start_main_~main__x~0)) (and (<= 63 ULTIMATE.start_main_~main__x~0) (<= 63 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 63) (<= ULTIMATE.start_main_~main__y~0 63)) (and (<= 64 ULTIMATE.start_main_~main__x~0) (<= 64 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 64) (<= ULTIMATE.start_main_~main__x~0 64)) (and (<= 74 ULTIMATE.start_main_~main__y~0) (<= 74 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 74) (<= ULTIMATE.start_main_~main__x~0 74)) (and (<= 54 ULTIMATE.start_main_~main__y~0) (<= 54 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 54) (< ULTIMATE.start_main_~main__x~0 55)) (and (<= 56 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 56) (<= 56 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 56)) (and (<= ULTIMATE.start_main_~main__y~0 62) (<= 62 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 62) (<= 62 ULTIMATE.start_main_~main__y~0)) (and (<= 98 ULTIMATE.start_main_~main__y~0) (<= 98 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 98) (<= ULTIMATE.start_main_~main__y~0 98)) (and (<= ULTIMATE.start_main_~main__y~0 55) (<= 55 ULTIMATE.start_main_~main__y~0) (<= 55 ULTIMATE.start_main_~main__x~0) (< ULTIMATE.start_main_~main__x~0 56)) (and (<= ULTIMATE.start_main_~main__y~0 60) (<= 60 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 60) (<= 60 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 89) (<= ULTIMATE.start_main_~main__y~0 89) (<= 89 ULTIMATE.start_main_~main__y~0) (<= 89 ULTIMATE.start_main_~main__x~0)) (and (<= 65 ULTIMATE.start_main_~main__y~0) (<= 65 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 65) (< ULTIMATE.start_main_~main__x~0 66)) (and (<= 52 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 52) (<= ULTIMATE.start_main_~main__x~0 52) (<= 52 ULTIMATE.start_main_~main__y~0)) (and (<= 85 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 85) (<= 85 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 85)) (and (<= 73 ULTIMATE.start_main_~main__x~0) (<= 73 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 73) (<= ULTIMATE.start_main_~main__y~0 73)) (and (<= 94 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 94) (<= 94 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 94)) (and (<= 100 ULTIMATE.start_main_~main__x~0) (<= 100 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 100)) (and (<= ULTIMATE.start_main_~main__y~0 76) (<= ULTIMATE.start_main_~main__x~0 76) (<= 76 ULTIMATE.start_main_~main__y~0) (<= 76 ULTIMATE.start_main_~main__x~0)) (and (<= 61 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 61) (<= ULTIMATE.start_main_~main__y~0 61) (<= 61 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 86) (<= 86 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 86) (<= 86 ULTIMATE.start_main_~main__y~0)) (and (<= 97 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 97) (<= 97 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 97))) [2020-11-29 19:44:29,727 INFO L274 CegarLoopResult]: For program point L37(lines 37 172) no Hoare annotation was computed. [2020-11-29 19:44:29,727 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-11-29 19:44:29,727 INFO L274 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-11-29 19:44:29,727 INFO L270 CegarLoopResult]: At program point L195(lines 25 196) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= ULTIMATE.start_main_~main__x~0 2) (<= 50 ULTIMATE.start_main_~main__y~0)) [2020-11-29 19:44:29,727 INFO L274 CegarLoopResult]: For program point L55(lines 55 136) no Hoare annotation was computed. [2020-11-29 19:44:29,727 INFO L277 CegarLoopResult]: At program point L212(lines 13 214) the Hoare annotation is: true [2020-11-29 19:44:29,728 INFO L270 CegarLoopResult]: At program point L171(lines 37 172) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= ULTIMATE.start_main_~main__x~0 4) (<= 50 ULTIMATE.start_main_~main__y~0)) [2020-11-29 19:44:29,728 INFO L274 CegarLoopResult]: For program point L31(lines 31 184) no Hoare annotation was computed. [2020-11-29 19:44:29,728 INFO L270 CegarLoopResult]: At program point L147(lines 49 148) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= ULTIMATE.start_main_~main__x~0 6) (<= 50 ULTIMATE.start_main_~main__y~0)) [2020-11-29 19:44:29,728 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 19:44:29,728 INFO L270 CegarLoopResult]: At program point L123(lines 61 124) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= ULTIMATE.start_main_~main__x~0 8) (<= 50 ULTIMATE.start_main_~main__y~0)) [2020-11-29 19:44:29,728 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-29 19:44:29,728 INFO L274 CegarLoopResult]: For program point L49(lines 49 148) no Hoare annotation was computed. [2020-11-29 19:44:29,728 INFO L274 CegarLoopResult]: For program point L74(lines 74 85) no Hoare annotation was computed. [2020-11-29 19:44:29,728 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 19:44:29,728 INFO L274 CegarLoopResult]: For program point L25(lines 25 196) no Hoare annotation was computed. [2020-11-29 19:44:29,728 INFO L274 CegarLoopResult]: For program point L17(lines 17 213) no Hoare annotation was computed. [2020-11-29 19:44:29,728 INFO L270 CegarLoopResult]: At program point L207(lines 19 208) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= ULTIMATE.start_main_~main__x~0 1) (<= 50 ULTIMATE.start_main_~main__y~0)) [2020-11-29 19:44:29,728 INFO L274 CegarLoopResult]: For program point L67(lines 67 112) no Hoare annotation was computed. [2020-11-29 19:44:29,728 INFO L270 CegarLoopResult]: At program point L183(lines 31 184) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= ULTIMATE.start_main_~main__x~0 3) (<= 50 ULTIMATE.start_main_~main__y~0)) [2020-11-29 19:44:29,728 INFO L274 CegarLoopResult]: For program point L43(lines 43 160) no Hoare annotation was computed. [2020-11-29 19:44:29,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:44:29 BoogieIcfgContainer [2020-11-29 19:44:29,763 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:44:29,764 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:44:29,764 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:44:29,764 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:44:29,764 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:42:05" (3/4) ... [2020-11-29 19:44:29,767 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 19:44:29,778 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-29 19:44:29,778 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 19:44:29,779 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:44:29,779 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:44:29,823 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c587f0d4-1ec3-406e-ac9c-8dae83a2d032/bin/uautomizer/witness.graphml [2020-11-29 19:44:29,824 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:44:29,825 INFO L168 Benchmark]: Toolchain (without parser) took 145585.13 ms. Allocated memory was 81.8 MB in the beginning and 436.2 MB in the end (delta: 354.4 MB). Free memory was 51.2 MB in the beginning and 186.2 MB in the end (delta: -135.0 MB). Peak memory consumption was 218.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:44:29,825 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 81.8 MB. Free memory was 42.7 MB in the beginning and 42.6 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:44:29,825 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.80 ms. Allocated memory is still 81.8 MB. Free memory was 51.0 MB in the beginning and 59.6 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:44:29,826 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.82 ms. Allocated memory is still 81.8 MB. Free memory was 59.6 MB in the beginning and 57.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:44:29,826 INFO L168 Benchmark]: Boogie Preprocessor took 38.35 ms. Allocated memory is still 81.8 MB. Free memory was 57.9 MB in the beginning and 57.0 MB in the end (delta: 949.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:44:29,826 INFO L168 Benchmark]: RCFGBuilder took 665.03 ms. Allocated memory is still 81.8 MB. Free memory was 57.0 MB in the beginning and 40.6 MB in the end (delta: 16.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:44:29,827 INFO L168 Benchmark]: TraceAbstraction took 144370.45 ms. Allocated memory was 81.8 MB in the beginning and 436.2 MB in the end (delta: 354.4 MB). Free memory was 39.8 MB in the beginning and 190.4 MB in the end (delta: -150.5 MB). Peak memory consumption was 242.3 MB. Max. memory is 16.1 GB. [2020-11-29 19:44:29,827 INFO L168 Benchmark]: Witness Printer took 60.28 ms. Allocated memory is still 436.2 MB. Free memory was 190.4 MB in the beginning and 186.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:44:29,829 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 81.8 MB. Free memory was 42.7 MB in the beginning and 42.6 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 384.80 ms. Allocated memory is still 81.8 MB. Free memory was 51.0 MB in the beginning and 59.6 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.82 ms. Allocated memory is still 81.8 MB. Free memory was 59.6 MB in the beginning and 57.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.35 ms. Allocated memory is still 81.8 MB. Free memory was 57.9 MB in the beginning and 57.0 MB in the end (delta: 949.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 665.03 ms. Allocated memory is still 81.8 MB. Free memory was 57.0 MB in the beginning and 40.6 MB in the end (delta: 16.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 144370.45 ms. Allocated memory was 81.8 MB in the beginning and 436.2 MB in the end (delta: 354.4 MB). Free memory was 39.8 MB in the beginning and 190.4 MB in the end (delta: -150.5 MB). Peak memory consumption was 242.3 MB. Max. memory is 16.1 GB. * Witness Printer took 60.28 ms. Allocated memory is still 436.2 MB. Free memory was 190.4 MB in the beginning and 186.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 1) && 50 <= main__y - InvariantResult [Line: 43]: Loop Invariant Derived loop invariant: (main__y <= 50 && 50 <= main__y) && main__x <= 5 - InvariantResult [Line: 67]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((main__x < 68 && main__y <= 67) && 67 <= main__y) && 67 <= main__x) || (((main__y <= 78 && 78 <= main__y) && 78 <= main__x) && main__x <= 78)) || (((84 <= main__x && 84 <= main__y) && main__y <= 84) && main__x <= 84)) || (((90 <= main__x && main__y <= 90) && 90 <= main__y) && main__x <= 90)) || (((main__y <= 75 && 75 <= main__x) && main__x < 76) && 75 <= main__y)) || (((main__y <= 81 && 81 <= main__x) && main__x < 82) && 81 <= main__y)) || (((main__y <= 88 && main__x <= 88) && 88 <= main__y) && 88 <= main__x)) || (((main__y <= 91 && 91 <= main__x) && 91 <= main__y) && main__x <= 91)) || (((main__x < 54 && 53 <= main__y) && 53 <= main__x) && main__y <= 53)) || (((66 <= main__x && 66 <= main__y) && main__y <= 66) && main__x < 67)) || (((58 <= main__y && 58 <= main__x) && main__y <= 58) && main__x < 59)) || (((57 <= main__x && main__y <= 57) && 57 <= main__y) && main__x < 58)) || (((main__y <= 68 && 68 <= main__y) && 68 <= main__x) && main__x <= 68)) || (((69 <= main__y && main__x <= 69) && 69 <= main__x) && main__y <= 69)) || (((87 <= main__x && main__x <= 87) && 87 <= main__y) && main__y <= 87)) || (((main__y <= 72 && 72 <= main__y) && 72 <= main__x) && main__x <= 72)) || (((77 <= main__x && main__x < 78) && main__y <= 77) && 77 <= main__y)) || (((main__y <= 79 && 79 <= main__x) && main__x <= 79) && 79 <= main__y)) || (((main__x < 81 && main__y <= 80) && 80 <= main__x) && 80 <= main__y)) || (((main__y <= 71 && 71 <= main__x) && main__x < 72) && 71 <= main__y)) || ((main__y <= 50 && main__x < 51) && 50 <= main__y)) || (((main__y <= 93 && main__x <= 93) && 93 <= main__x) && 93 <= main__y)) || (((main__y <= 99 && main__x <= 99) && 99 <= main__y) && 99 <= main__x)) || (((main__x <= 82 && 82 <= main__y) && 82 <= main__x) && main__y <= 82)) || (((96 <= main__y && main__y <= 96) && 96 <= main__x) && main__x <= 96)) || (((95 <= main__x && main__y <= 95) && main__x <= 95) && 95 <= main__y)) || (((70 <= main__y && main__y <= 70) && 70 <= main__x) && main__x <= 70)) || (((51 <= main__y && 51 <= main__x) && main__y <= 51) && main__x <= 51)) || (((main__x <= 92 && main__y <= 92) && 92 <= main__x) && 92 <= main__y)) || (((main__y <= 83 && main__x < 84) && 83 <= main__y) && 83 <= main__x)) || (((main__y <= 59 && 59 <= main__y) && main__x <= 59) && 59 <= main__x)) || (((63 <= main__x && 63 <= main__y) && main__x <= 63) && main__y <= 63)) || (((64 <= main__x && 64 <= main__y) && main__y <= 64) && main__x <= 64)) || (((74 <= main__y && 74 <= main__x) && main__y <= 74) && main__x <= 74)) || (((54 <= main__y && 54 <= main__x) && main__y <= 54) && main__x < 55)) || (((56 <= main__x && main__x <= 56) && 56 <= main__y) && main__y <= 56)) || (((main__y <= 62 && 62 <= main__x) && main__x <= 62) && 62 <= main__y)) || (((98 <= main__y && 98 <= main__x) && main__x <= 98) && main__y <= 98)) || (((main__y <= 55 && 55 <= main__y) && 55 <= main__x) && main__x < 56)) || (((main__y <= 60 && 60 <= main__x) && main__x <= 60) && 60 <= main__y)) || (((main__x <= 89 && main__y <= 89) && 89 <= main__y) && 89 <= main__x)) || (((65 <= main__y && 65 <= main__x) && main__y <= 65) && main__x < 66)) || (((52 <= main__x && main__y <= 52) && main__x <= 52) && 52 <= main__y)) || (((85 <= main__x && main__x <= 85) && 85 <= main__y) && main__y <= 85)) || (((73 <= main__x && 73 <= main__y) && main__x <= 73) && main__y <= 73)) || (((94 <= main__y && main__x <= 94) && 94 <= main__x) && main__y <= 94)) || ((100 <= main__x && 100 <= main__y) && main__y <= 100)) || (((main__y <= 76 && main__x <= 76) && 76 <= main__y) && 76 <= main__x)) || (((61 <= main__x && main__x <= 61) && main__y <= 61) && 61 <= main__y)) || (((main__x <= 86 && 86 <= main__x) && main__y <= 86) && 86 <= main__y)) || (((97 <= main__x && main__x <= 97) && 97 <= main__y) && main__y <= 97) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 4) && 50 <= main__y - InvariantResult [Line: 61]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 8) && 50 <= main__y - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 3) && 50 <= main__y - InvariantResult [Line: 55]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 7) && 50 <= main__y - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 2) && 50 <= main__y - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 6) && 50 <= main__y - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 142.3s, OverallIterations: 62, TraceHistogramMax: 92, AutomataDifference: 19.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 532 SDtfs, 2482 SDslu, 8528 SDs, 0 SdLazy, 17014 SolverSat, 2274 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8954 GetRequests, 6142 SyntacticMatches, 5 SemanticMatches, 2807 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3035 ImplicationChecksByTransitivity, 98.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred 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: 0.3s AutomataMinimizationTime, 62 MinimizatonAttempts, 28 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 10 PreInvPairs, 111 NumberOfFragments, 739 HoareAnnotationTreeSize, 10 FomulaSimplifications, 592 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 10 FomulaSimplificationsInter, 325 FormulaSimplificationTreeSizeReductionInter, 1.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 4.3s SatisfiabilityAnalysisTime, 103.6s InterpolantComputationTime, 13187 NumberOfCodeBlocks, 13127 NumberOfCodeBlocksAsserted, 1399 NumberOfCheckSat, 13072 ConstructedInterpolants, 0 QuantifiedInterpolants, 5031452 SizeOfPredicates, 31 NumberOfNonLiveVariables, 17099 ConjunctsInSsa, 2131 ConjunctsInUnsatCore, 115 InterpolantComputations, 9 PerfectInterpolantSequences, 138585/345523 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 correct! Received shutdown request...