./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test23-1.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_f7e4744c-6873-486b-8457-db1e93dc1d42/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/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 7597b1bdd5668cdbfa67e3bc4585b635c0270f49 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:10:26,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:10:26,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:10:26,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:10:26,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:10:26,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:10:26,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:10:26,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:10:26,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:10:26,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:10:26,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:10:26,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:10:26,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:10:26,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:10:26,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:10:26,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:10:26,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:10:26,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:10:26,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:10:26,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:10:26,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:10:26,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:10:26,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:10:26,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:10:26,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:10:26,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:10:26,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:10:26,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:10:26,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:10:26,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:10:26,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:10:26,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:10:26,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:10:26,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:10:26,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:10:26,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:10:26,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:10:26,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:10:26,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:10:26,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:10:26,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:10:26,863 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:10:26,908 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:10:26,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:10:26,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:10:26,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:10:26,915 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:10:26,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:10:26,915 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:10:26,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:10:26,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:10:26,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:10:26,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:10:26,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:10:26,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:10:26,918 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:10:26,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:10:26,919 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:10:26,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:10:26,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:10:26,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:10:26,920 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:10:26,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:10:26,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:10:26,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:10:26,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:10:26,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:10:26,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:10:26,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:10:26,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:10:26,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:10:26,922 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_f7e4744c-6873-486b-8457-db1e93dc1d42/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7597b1bdd5668cdbfa67e3bc4585b635c0270f49 [2020-11-30 01:10:27,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:10:27,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:10:27,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:10:27,238 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:10:27,239 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:10:27,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test23-1.c [2020-11-30 01:10:27,304 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/bin/uautomizer/data/85ce75773/05fb215c5f3b4808bec96fbc7a783eb0/FLAG00d6da7f2 [2020-11-30 01:10:27,773 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:10:27,774 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/sv-benchmarks/c/ldv-regression/test23-1.c [2020-11-30 01:10:27,781 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/bin/uautomizer/data/85ce75773/05fb215c5f3b4808bec96fbc7a783eb0/FLAG00d6da7f2 [2020-11-30 01:10:28,143 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/bin/uautomizer/data/85ce75773/05fb215c5f3b4808bec96fbc7a783eb0 [2020-11-30 01:10:28,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:10:28,147 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:10:28,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:10:28,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:10:28,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:10:28,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ca8941f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28, skipping insertion in model container [2020-11-30 01:10:28,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:10:28,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:10:28,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:10:28,381 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:10:28,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:10:28,442 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:10:28,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28 WrapperNode [2020-11-30 01:10:28,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:10:28,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:10:28,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:10:28,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:10:28,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:10:28,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:10:28,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:10:28,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:10:28,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:10:28,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:10:28,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:10:28,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:10:28,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/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 [2020-11-30 01:10:28,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:10:28,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:10:28,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:10:28,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:10:28,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:10:28,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 01:10:28,946 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:10:28,947 INFO L298 CfgBuilder]: Removed 15 assume(true) statements. [2020-11-30 01:10:28,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:28 BoogieIcfgContainer [2020-11-30 01:10:28,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:10:28,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:10:28,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:10:28,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:10:28,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:10:28" (1/3) ... [2020-11-30 01:10:28,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efb822c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:10:28, skipping insertion in model container [2020-11-30 01:10:28,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (2/3) ... [2020-11-30 01:10:28,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efb822c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:10:28, skipping insertion in model container [2020-11-30 01:10:28,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:28" (3/3) ... [2020-11-30 01:10:28,958 INFO L111 eAbstractionObserver]: Analyzing ICFG test23-1.c [2020-11-30 01:10:28,970 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:10:28,974 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:10:28,987 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:10:29,012 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:10:29,013 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:10:29,013 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:10:29,013 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:10:29,013 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:10:29,013 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:10:29,013 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:10:29,014 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:10:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-30 01:10:29,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 01:10:29,032 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:29,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:29,033 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:29,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2100293056, now seen corresponding path program 1 times [2020-11-30 01:10:29,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:29,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090290699] [2020-11-30 01:10:29,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:29,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090290699] [2020-11-30 01:10:29,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:10:29,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:10:29,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584676727] [2020-11-30 01:10:29,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:10:29,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:29,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:10:29,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:10:29,274 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-11-30 01:10:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:29,292 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-11-30 01:10:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:10:29,294 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-11-30 01:10:29,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:29,314 INFO L225 Difference]: With dead ends: 31 [2020-11-30 01:10:29,315 INFO L226 Difference]: Without dead ends: 17 [2020-11-30 01:10:29,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:10:29,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-30 01:10:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-30 01:10:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-30 01:10:29,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-11-30 01:10:29,355 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2020-11-30 01:10:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:29,357 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-11-30 01:10:29,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:10:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-11-30 01:10:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 01:10:29,358 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:29,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:29,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:10:29,360 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:29,363 INFO L82 PathProgramCache]: Analyzing trace with hash 478567452, now seen corresponding path program 1 times [2020-11-30 01:10:29,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:29,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699243043] [2020-11-30 01:10:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:29,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699243043] [2020-11-30 01:10:29,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:10:29,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-30 01:10:29,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914449781] [2020-11-30 01:10:29,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:10:29,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:29,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:10:29,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:10:29,763 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 11 states. [2020-11-30 01:10:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:30,440 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-11-30 01:10:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-30 01:10:30,445 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-11-30 01:10:30,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:30,447 INFO L225 Difference]: With dead ends: 63 [2020-11-30 01:10:30,448 INFO L226 Difference]: Without dead ends: 58 [2020-11-30 01:10:30,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-11-30 01:10:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-30 01:10:30,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 19. [2020-11-30 01:10:30,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-30 01:10:30,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-11-30 01:10:30,466 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-11-30 01:10:30,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:30,467 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-11-30 01:10:30,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:10:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-11-30 01:10:30,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 01:10:30,471 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:30,472 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:30,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:10:30,473 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:30,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:30,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1851619425, now seen corresponding path program 1 times [2020-11-30 01:10:30,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:30,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275062393] [2020-11-30 01:10:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:30,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275062393] [2020-11-30 01:10:30,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473588982] [2020-11-30 01:10:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/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 [2020-11-30 01:10:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:30,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 01:10:30,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:31,117 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2020-11-30 01:10:31,118 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:10:31,136 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:10:31,142 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:10:31,143 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:80, output treesize:76 [2020-11-30 01:10:31,363 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-30 01:10:31,366 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:10:31,367 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 19 [2020-11-30 01:10:31,368 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:10:31,382 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:10:31,388 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:10:31,389 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:78, output treesize:33 [2020-11-30 01:10:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:31,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:31,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-11-30 01:10:31,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519100309] [2020-11-30 01:10:31,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-30 01:10:31,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:31,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-30 01:10:31,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=362, Unknown=1, NotChecked=0, Total=420 [2020-11-30 01:10:31,985 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 21 states. [2020-11-30 01:10:41,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:41,117 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-11-30 01:10:41,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-30 01:10:41,120 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 18 [2020-11-30 01:10:41,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:41,122 INFO L225 Difference]: With dead ends: 71 [2020-11-30 01:10:41,122 INFO L226 Difference]: Without dead ends: 66 [2020-11-30 01:10:41,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=328, Invalid=1307, Unknown=5, NotChecked=0, Total=1640 [2020-11-30 01:10:41,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-30 01:10:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 21. [2020-11-30 01:10:41,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 01:10:41,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-11-30 01:10:41,133 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-11-30 01:10:41,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:41,134 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-11-30 01:10:41,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-30 01:10:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-11-30 01:10:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 01:10:41,136 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:41,136 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:41,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 01:10:41,362 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:41,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:41,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1495361690, now seen corresponding path program 2 times [2020-11-30 01:10:41,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:41,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302060395] [2020-11-30 01:10:41,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:41,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302060395] [2020-11-30 01:10:41,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562286325] [2020-11-30 01:10:41,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/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 [2020-11-30 01:10:41,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:10:41,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:41,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-30 01:10:41,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:41,924 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2020-11-30 01:10:41,924 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:10:41,943 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:10:41,947 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:10:41,947 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:83, output treesize:79 [2020-11-30 01:10:42,187 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-30 01:10:42,191 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:10:42,192 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 19 [2020-11-30 01:10:42,193 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:10:42,207 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:10:42,212 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:10:42,212 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:78, output treesize:33 [2020-11-30 01:10:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:42,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:42,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-11-30 01:10:42,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719268375] [2020-11-30 01:10:42,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-30 01:10:42,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:42,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-30 01:10:42,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=437, Unknown=1, NotChecked=0, Total=506 [2020-11-30 01:10:42,768 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 23 states. [2020-11-30 01:10:43,650 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-11-30 01:10:57,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:57,872 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-11-30 01:10:57,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-30 01:10:57,877 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2020-11-30 01:10:57,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:57,878 INFO L225 Difference]: With dead ends: 79 [2020-11-30 01:10:57,878 INFO L226 Difference]: Without dead ends: 74 [2020-11-30 01:10:57,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=514, Invalid=2029, Unknown=7, NotChecked=0, Total=2550 [2020-11-30 01:10:57,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-30 01:10:57,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 23. [2020-11-30 01:10:57,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 01:10:57,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-11-30 01:10:57,887 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-11-30 01:10:57,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:57,888 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-11-30 01:10:57,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-30 01:10:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-11-30 01:10:57,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 01:10:57,889 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:57,889 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:58,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:58,107 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:58,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:58,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1013708501, now seen corresponding path program 3 times [2020-11-30 01:10:58,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:58,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270387563] [2020-11-30 01:10:58,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:58,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270387563] [2020-11-30 01:10:58,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007077082] [2020-11-30 01:10:58,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/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 [2020-11-30 01:10:58,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-30 01:10:58,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:58,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-30 01:10:58,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:58,634 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2020-11-30 01:10:58,634 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:10:58,647 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:10:58,650 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:10:58,650 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:83, output treesize:79 [2020-11-30 01:10:58,951 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-30 01:10:58,955 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:10:58,956 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 19 [2020-11-30 01:10:58,956 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:10:58,987 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:10:58,991 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:10:58,991 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:78, output treesize:33 [2020-11-30 01:11:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:01,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:11:01,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-11-30 01:11:01,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831006789] [2020-11-30 01:11:01,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-30 01:11:01,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:01,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-30 01:11:01,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=517, Unknown=1, NotChecked=0, Total=600 [2020-11-30 01:11:01,462 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 25 states. [2020-11-30 01:11:02,877 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-11-30 01:11:03,107 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-30 01:11:08,796 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-11-30 01:11:09,042 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-11-30 01:11:20,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:20,448 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2020-11-30 01:11:20,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-30 01:11:20,466 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 22 [2020-11-30 01:11:20,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:20,467 INFO L225 Difference]: With dead ends: 87 [2020-11-30 01:11:20,467 INFO L226 Difference]: Without dead ends: 82 [2020-11-30 01:11:20,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=742, Invalid=2909, Unknown=9, NotChecked=0, Total=3660 [2020-11-30 01:11:20,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-30 01:11:20,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 25. [2020-11-30 01:11:20,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 01:11:20,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-30 01:11:20,477 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-11-30 01:11:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:20,477 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-30 01:11:20,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-30 01:11:20,477 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-30 01:11:20,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 01:11:20,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:20,478 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:20,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:20,679 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:20,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:20,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2001461840, now seen corresponding path program 4 times [2020-11-30 01:11:20,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:20,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689434532] [2020-11-30 01:11:20,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:11:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:20,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689434532] [2020-11-30 01:11:20,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749418480] [2020-11-30 01:11:20,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/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 [2020-11-30 01:11:20,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:11:20,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:11:20,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 01:11:20,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:20,980 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2020-11-30 01:11:20,980 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:11:20,991 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:11:20,992 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 01:11:20,993 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:67 [2020-11-30 01:11:21,283 INFO L350 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2020-11-30 01:11:21,284 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 19 [2020-11-30 01:11:21,285 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:11:21,292 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:11:21,293 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:11:21,293 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:5 [2020-11-30 01:11:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:21,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:11:21,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2020-11-30 01:11:21,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295483474] [2020-11-30 01:11:21,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 01:11:21,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:21,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 01:11:21,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-11-30 01:11:21,307 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 20 states. [2020-11-30 01:11:40,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:40,467 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2020-11-30 01:11:40,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-30 01:11:40,468 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-30 01:11:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:40,469 INFO L225 Difference]: With dead ends: 95 [2020-11-30 01:11:40,469 INFO L226 Difference]: Without dead ends: 90 [2020-11-30 01:11:40,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=956, Invalid=3076, Unknown=0, NotChecked=0, Total=4032 [2020-11-30 01:11:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-30 01:11:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 27. [2020-11-30 01:11:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:11:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-11-30 01:11:40,479 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-11-30 01:11:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:40,480 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-11-30 01:11:40,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 01:11:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-11-30 01:11:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 01:11:40,481 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:40,481 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:40,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:40,694 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:40,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2044648203, now seen corresponding path program 5 times [2020-11-30 01:11:40,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:40,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152595037] [2020-11-30 01:11:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:11:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:40,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152595037] [2020-11-30 01:11:40,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389570385] [2020-11-30 01:11:40,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/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 [2020-11-30 01:11:40,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-30 01:11:40,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:11:40,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-30 01:11:40,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:41,234 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2020-11-30 01:11:41,234 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:11:41,257 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:11:41,260 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:11:41,260 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:91 [2020-11-30 01:11:41,829 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-30 01:11:41,832 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:11:41,832 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 18 [2020-11-30 01:11:41,833 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:11:41,855 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:11:41,858 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:11:41,859 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:86, output treesize:27 [2020-11-30 01:11:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:44,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:11:44,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-11-30 01:11:44,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846433786] [2020-11-30 01:11:44,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-30 01:11:44,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:44,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-30 01:11:44,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=692, Unknown=1, NotChecked=0, Total=812 [2020-11-30 01:11:44,010 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 29 states. [2020-11-30 01:12:24,617 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-11-30 01:12:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:12:34,795 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2020-11-30 01:12:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-30 01:12:34,798 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 26 [2020-11-30 01:12:34,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:12:34,799 INFO L225 Difference]: With dead ends: 103 [2020-11-30 01:12:34,800 INFO L226 Difference]: Without dead ends: 98 [2020-11-30 01:12:34,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=1276, Invalid=5185, Unknown=19, NotChecked=0, Total=6480 [2020-11-30 01:12:34,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-30 01:12:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 29. [2020-11-30 01:12:34,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-30 01:12:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-11-30 01:12:34,815 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2020-11-30 01:12:34,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:12:34,816 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-11-30 01:12:34,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-30 01:12:34,819 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-11-30 01:12:34,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 01:12:34,820 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:12:34,820 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:12:35,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-30 01:12:35,038 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:12:35,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:12:35,038 INFO L82 PathProgramCache]: Analyzing trace with hash -597070086, now seen corresponding path program 6 times [2020-11-30 01:12:35,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:12:35,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567004744] [2020-11-30 01:12:35,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:12:35,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:12:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:12:35,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567004744] [2020-11-30 01:12:35,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710833077] [2020-11-30 01:12:35,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/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 [2020-11-30 01:12:35,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-30 01:12:35,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:12:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-30 01:12:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:12:35,583 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2020-11-30 01:12:35,583 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:12:35,599 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:12:35,601 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:12:35,601 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:83, output treesize:79 [2020-11-30 01:12:36,335 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-30 01:12:36,338 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:12:36,338 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 19 [2020-11-30 01:12:36,339 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:12:36,358 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:12:36,361 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:12:36,361 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:78, output treesize:33 [2020-11-30 01:12:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:12:37,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:12:37,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-11-30 01:12:37,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276522432] [2020-11-30 01:12:37,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-30 01:12:37,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:12:37,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-30 01:12:37,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=787, Unknown=1, NotChecked=0, Total=930 [2020-11-30 01:12:37,468 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 31 states. [2020-11-30 01:12:44,936 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-11-30 01:12:45,818 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-30 01:12:50,731 WARN L193 SmtUtils]: Spent 995.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-11-30 01:12:51,474 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-30 01:12:57,063 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 56 [2020-11-30 01:13:04,737 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-11-30 01:13:23,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:13:23,690 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2020-11-30 01:13:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-11-30 01:13:23,691 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 28 [2020-11-30 01:13:23,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:13:23,692 INFO L225 Difference]: With dead ends: 111 [2020-11-30 01:13:23,692 INFO L226 Difference]: Without dead ends: 106 [2020-11-30 01:13:23,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=1678, Invalid=6497, Unknown=15, NotChecked=0, Total=8190 [2020-11-30 01:13:23,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-30 01:13:23,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 31. [2020-11-30 01:13:23,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 01:13:23,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-11-30 01:13:23,712 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-11-30 01:13:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:13:23,714 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-11-30 01:13:23,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-30 01:13:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-11-30 01:13:23,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-30 01:13:23,719 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:13:23,719 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:13:23,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:13:23,946 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:13:23,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:13:23,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1043903553, now seen corresponding path program 7 times [2020-11-30 01:13:23,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:13:23,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395675662] [2020-11-30 01:13:23,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:13:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:13:24,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395675662] [2020-11-30 01:13:24,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745621002] [2020-11-30 01:13:24,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/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 [2020-11-30 01:13:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:24,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-30 01:13:24,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:13:24,387 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2020-11-30 01:13:24,387 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:13:24,405 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:13:24,406 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:13:24,406 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2020-11-30 01:13:24,825 INFO L350 Elim1Store]: treesize reduction 31, result has 8.8 percent of original size [2020-11-30 01:13:24,826 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 29 [2020-11-30 01:13:24,826 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:13:24,831 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:13:24,832 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:13:24,832 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:82, output treesize:5 [2020-11-30 01:13:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:13:24,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:13:24,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2020-11-30 01:13:24,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231456768] [2020-11-30 01:13:24,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-30 01:13:24,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:13:24,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-30 01:13:24,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2020-11-30 01:13:24,840 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 26 states. [2020-11-30 01:13:29,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:13:29,020 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2020-11-30 01:13:29,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-11-30 01:13:29,034 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-11-30 01:13:29,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:13:29,035 INFO L225 Difference]: With dead ends: 119 [2020-11-30 01:13:29,035 INFO L226 Difference]: Without dead ends: 114 [2020-11-30 01:13:29,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2924 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1910, Invalid=6832, Unknown=0, NotChecked=0, Total=8742 [2020-11-30 01:13:29,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-30 01:13:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 33. [2020-11-30 01:13:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 01:13:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-11-30 01:13:29,048 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-11-30 01:13:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:13:29,048 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-11-30 01:13:29,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-30 01:13:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-11-30 01:13:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-30 01:13:29,049 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:13:29,049 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:13:29,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:13:29,273 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:13:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:13:29,274 INFO L82 PathProgramCache]: Analyzing trace with hash -954135740, now seen corresponding path program 8 times [2020-11-30 01:13:29,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:13:29,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377119439] [2020-11-30 01:13:29,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:13:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:13:29,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377119439] [2020-11-30 01:13:29,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485768900] [2020-11-30 01:13:29,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/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 [2020-11-30 01:13:29,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:13:29,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:13:29,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-30 01:13:29,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:13:29,970 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2020-11-30 01:13:29,970 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:13:29,989 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:13:29,991 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:13:29,992 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:83, output treesize:79 [2020-11-30 01:13:30,897 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-30 01:13:30,900 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:13:30,901 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 19 [2020-11-30 01:13:30,901 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:13:30,916 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:13:30,919 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:13:30,919 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:78, output treesize:33 [2020-11-30 01:13:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:13:34,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:13:34,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-11-30 01:13:34,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949471334] [2020-11-30 01:13:34,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-30 01:13:34,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:13:34,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-30 01:13:34,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=990, Unknown=3, NotChecked=0, Total=1190 [2020-11-30 01:13:34,999 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 35 states. [2020-11-30 01:13:36,151 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-11-30 01:13:42,666 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-11-30 01:13:43,472 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-30 01:13:55,422 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-11-30 01:13:56,433 WARN L193 SmtUtils]: Spent 946.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-30 01:14:07,128 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-11-30 01:14:07,324 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-30 01:14:13,272 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-11-30 01:14:26,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:14:26,639 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2020-11-30 01:14:26,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-11-30 01:14:26,640 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 32 [2020-11-30 01:14:26,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:14:26,640 INFO L225 Difference]: With dead ends: 127 [2020-11-30 01:14:26,641 INFO L226 Difference]: Without dead ends: 122 [2020-11-30 01:14:26,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3907 ImplicationChecksByTransitivity, 48.4s TimeCoverageRelationStatistics Valid=2512, Invalid=9677, Unknown=21, NotChecked=0, Total=12210 [2020-11-30 01:14:26,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-30 01:14:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 35. [2020-11-30 01:14:26,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 01:14:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-11-30 01:14:26,653 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2020-11-30 01:14:26,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:14:26,654 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-11-30 01:14:26,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-30 01:14:26,654 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-11-30 01:14:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-30 01:14:26,654 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:14:26,655 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:14:26,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-30 01:14:26,858 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:14:26,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:14:26,858 INFO L82 PathProgramCache]: Analyzing trace with hash -586613367, now seen corresponding path program 9 times [2020-11-30 01:14:26,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:14:26,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913605986] [2020-11-30 01:14:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:14:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:14:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:14:27,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913605986] [2020-11-30 01:14:27,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127828229] [2020-11-30 01:14:27,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/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 [2020-11-30 01:14:27,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-30 01:14:27,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:14:27,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-30 01:14:27,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:14:27,549 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2020-11-30 01:14:27,550 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:14:27,567 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:14:27,568 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:14:27,568 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:91 [2020-11-30 01:14:28,290 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-30 01:14:28,292 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:14:28,293 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 18 [2020-11-30 01:14:28,293 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:14:28,304 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:14:28,306 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:14:28,306 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:86, output treesize:27 [2020-11-30 01:14:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:14:30,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:14:30,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-11-30 01:14:30,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604721207] [2020-11-30 01:14:30,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-30 01:14:30,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:14:30,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-30 01:14:30,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1102, Unknown=1, NotChecked=0, Total=1332 [2020-11-30 01:14:30,407 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 37 states. [2020-11-30 01:15:52,537 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-11-30 01:16:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:16:08,033 INFO L93 Difference]: Finished difference Result 135 states and 141 transitions. [2020-11-30 01:16:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-11-30 01:16:08,034 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 34 [2020-11-30 01:16:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:16:08,035 INFO L225 Difference]: With dead ends: 135 [2020-11-30 01:16:08,035 INFO L226 Difference]: Without dead ends: 130 [2020-11-30 01:16:08,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4762 ImplicationChecksByTransitivity, 64.4s TimeCoverageRelationStatistics Valid=2872, Invalid=11617, Unknown=31, NotChecked=0, Total=14520 [2020-11-30 01:16:08,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-30 01:16:08,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 37. [2020-11-30 01:16:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-30 01:16:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-30 01:16:08,047 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2020-11-30 01:16:08,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:16:08,048 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-30 01:16:08,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-30 01:16:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-30 01:16:08,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-30 01:16:08,049 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:16:08,049 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:16:08,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:16:08,269 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:16:08,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:16:08,269 INFO L82 PathProgramCache]: Analyzing trace with hash 415068814, now seen corresponding path program 10 times [2020-11-30 01:16:08,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:16:08,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119367894] [2020-11-30 01:16:08,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:16:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:16:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:16:08,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119367894] [2020-11-30 01:16:08,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628975557] [2020-11-30 01:16:08,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/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 [2020-11-30 01:16:08,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:16:08,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:16:08,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-30 01:16:08,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:16:08,736 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2020-11-30 01:16:08,736 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:16:08,748 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:16:08,749 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 01:16:08,749 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:67 [2020-11-30 01:16:09,554 INFO L350 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2020-11-30 01:16:09,555 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 17 [2020-11-30 01:16:09,555 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:16:09,561 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:16:09,562 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:16:09,562 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:3 [2020-11-30 01:16:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:16:09,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:16:09,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2020-11-30 01:16:09,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561772144] [2020-11-30 01:16:09,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-30 01:16:09,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:16:09,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-30 01:16:09,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2020-11-30 01:16:09,571 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 32 states. [2020-11-30 01:16:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:16:28,171 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2020-11-30 01:16:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-11-30 01:16:28,173 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-11-30 01:16:28,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:16:28,174 INFO L225 Difference]: With dead ends: 143 [2020-11-30 01:16:28,174 INFO L226 Difference]: Without dead ends: 138 [2020-11-30 01:16:28,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5417 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=3566, Invalid=11686, Unknown=0, NotChecked=0, Total=15252 [2020-11-30 01:16:28,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-30 01:16:28,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 39. [2020-11-30 01:16:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-30 01:16:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-11-30 01:16:28,187 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2020-11-30 01:16:28,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:16:28,188 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-11-30 01:16:28,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-30 01:16:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-11-30 01:16:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-30 01:16:28,189 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:16:28,189 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:16:28,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:16:28,397 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:16:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:16:28,398 INFO L82 PathProgramCache]: Analyzing trace with hash 958970451, now seen corresponding path program 11 times [2020-11-30 01:16:28,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:16:28,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061528791] [2020-11-30 01:16:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:16:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:16:28,426 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:16:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:16:28,469 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:16:28,493 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:16:28,493 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:16:28,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-30 01:16:28,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:16:28 BoogieIcfgContainer [2020-11-30 01:16:28,560 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:16:28,561 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:16:28,561 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:16:28,561 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:16:28,562 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:28" (3/4) ... [2020-11-30 01:16:28,564 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:16:28,630 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f7e4744c-6873-486b-8457-db1e93dc1d42/bin/uautomizer/witness.graphml [2020-11-30 01:16:28,630 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:16:28,631 INFO L168 Benchmark]: Toolchain (without parser) took 360483.50 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 58.9 MB in the beginning and 45.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 53.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:16:28,632 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory was 47.6 MB in the beginning and 47.6 MB in the end (delta: 34.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:16:28,632 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.09 ms. Allocated memory is still 90.2 MB. Free memory was 58.7 MB in the beginning and 66.5 MB in the end (delta: -7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:16:28,633 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.23 ms. Allocated memory is still 90.2 MB. Free memory was 66.5 MB in the beginning and 64.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:16:28,633 INFO L168 Benchmark]: Boogie Preprocessor took 27.73 ms. Allocated memory is still 90.2 MB. Free memory was 64.8 MB in the beginning and 63.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:16:28,634 INFO L168 Benchmark]: RCFGBuilder took 417.24 ms. Allocated memory is still 90.2 MB. Free memory was 63.5 MB in the beginning and 47.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-30 01:16:28,634 INFO L168 Benchmark]: TraceAbstraction took 359609.95 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 46.7 MB in the beginning and 49.9 MB in the end (delta: -3.2 MB). Peak memory consumption was 39.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:16:28,634 INFO L168 Benchmark]: Witness Printer took 69.33 ms. Allocated memory is still 132.1 MB. Free memory was 49.9 MB in the beginning and 45.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:16:28,637 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory was 47.6 MB in the beginning and 47.6 MB in the end (delta: 34.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 296.09 ms. Allocated memory is still 90.2 MB. Free memory was 58.7 MB in the beginning and 66.5 MB in the end (delta: -7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.23 ms. Allocated memory is still 90.2 MB. Free memory was 66.5 MB in the beginning and 64.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.73 ms. Allocated memory is still 90.2 MB. Free memory was 64.8 MB in the beginning and 63.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 417.24 ms. Allocated memory is still 90.2 MB. Free memory was 63.5 MB in the beginning and 47.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 359609.95 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 46.7 MB in the beginning and 49.9 MB in the end (delta: -3.2 MB). Peak memory consumption was 39.5 MB. Max. memory is 16.1 GB. * Witness Printer took 69.33 ms. Allocated memory is still 132.1 MB. Free memory was 49.9 MB in the beginning and 45.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] struct dummy d1, d2; VAL [d1={5:0}, d2={9:0}] [L16] d1.a = __VERIFIER_nondet_int() [L17] d1.b = __VERIFIER_nondet_int() [L19] d2.a = __VERIFIER_nondet_int() [L20] d2.b = __VERIFIER_nondet_int() [L25] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [d1={5:0}, d2={9:0}] [L25] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L36] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L25] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [d1={5:0}, d2={9:0}] [L25] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L36] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L37] int i = __VERIFIER_nondet_int(); [L38] COND TRUE pd1 != 0 && pd1 == pd2 && i >= 0 && i < 10 [L39] pd2->array[i] = i [L40] int *pa = &pd1->array[i]; [L41] EXPR pd2->array[i] [L41] i = pd2->array[i] - 10 [L42] EXPR \read(*pa) VAL [d1={5:0}, d2={9:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={5:0}, d2={9:0}] [L42] EXPR \read(*pa) VAL [d1={5:0}, d2={9:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={5:0}, d2={9:0}] [L42] EXPR \read(*pa) VAL [d1={5:0}, d2={9:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={5:0}, d2={9:0}] [L42] EXPR \read(*pa) VAL [d1={5:0}, d2={9:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={5:0}, d2={9:0}] [L42] EXPR \read(*pa) VAL [d1={5:0}, d2={9:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={5:0}, d2={9:0}] [L42] EXPR \read(*pa) VAL [d1={5:0}, d2={9:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={5:0}, d2={9:0}] [L42] EXPR \read(*pa) VAL [d1={5:0}, d2={9:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={5:0}, d2={9:0}] [L42] EXPR \read(*pa) VAL [d1={5:0}, d2={9:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={5:0}, d2={9:0}] [L42] EXPR \read(*pa) VAL [d1={5:0}, d2={9:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={5:0}, d2={9:0}] [L42] EXPR \read(*pa) VAL [d1={5:0}, d2={9:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={5:0}, d2={9:0}] [L42] EXPR \read(*pa) VAL [d1={5:0}, d2={9:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={5:0}, d2={9:0}] [L42] EXPR \read(*pa) VAL [d1={5:0}, d2={9:0}] [L42] COND FALSE !(i <= *pa) [L30] EXPR s1->array[i] [L30] return s1->array[i] == i; [L45] COND TRUE !check(pd2, i) [L3] __assert_fail("0", "test23-1.c", 3, "reach_error") VAL [d1={5:0}, d2={9:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 359.4s, OverallIterations: 13, TraceHistogramMax: 12, AutomataDifference: 332.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 112 SDtfs, 2415 SDslu, 1285 SDs, 0 SdLazy, 2682 SolverSat, 984 SolverUnsat, 70 SolverUnknown, 0 SolverNotchecked, 116.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1001 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 840 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24412 ImplicationChecksByTransitivity, 234.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 759 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 23.3s InterpolantComputationTime, 609 NumberOfCodeBlocks, 597 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 549 ConstructedInterpolants, 112 QuantifiedInterpolants, 316980 SizeOfPredicates, 105 NumberOfNonLiveVariables, 1349 ConjunctsInSsa, 340 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 0/880 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...